/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/popl20/send-receive-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 15:41:39,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 15:41:39,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 15:41:39,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 15:41:39,758 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 15:41:39,786 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 15:41:39,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 15:41:39,786 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 15:41:39,786 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 15:41:39,788 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 15:41:39,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 15:41:39,788 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 15:41:39,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 15:41:39,789 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 15:41:39,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 15:41:39,789 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 15:41:39,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 15:41:39,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 15:41:39,790 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 15:41:39,790 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 15:41:39,790 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 15:41:39,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 15:41:39,790 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 15:41:39,790 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 15:41:39,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 15:41:39,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 15:41:39,790 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 15:41:39,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 15:41:39,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:41:39,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 15:41:39,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 15:41:39,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 15:41:39,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 15:41:39,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 15:41:39,791 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 15:41:39,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 15:41:39,791 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 15:41:39,791 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 15:41:40,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 15:41:40,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 15:41:40,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 15:41:40,074 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 15:41:40,075 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 15:41:40,076 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive-alt.wvr.bpl [2021-06-05 15:41:40,076 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive-alt.wvr.bpl' [2021-06-05 15:41:40,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 15:41:40,103 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 15:41:40,105 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 15:41:40,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 15:41:40,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 15:41:40,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:41:40" (1/1) ... [2021-06-05 15:41:40,118 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:41:40" (1/1) ... [2021-06-05 15:41:40,123 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 15:41:40,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 15:41:40,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 15:41:40,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 15:41:40,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:41:40" (1/1) ... [2021-06-05 15:41:40,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:41:40" (1/1) ... [2021-06-05 15:41:40,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:41:40" (1/1) ... [2021-06-05 15:41:40,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:41:40" (1/1) ... [2021-06-05 15:41:40,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:41:40" (1/1) ... [2021-06-05 15:41:40,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:41:40" (1/1) ... [2021-06-05 15:41:40,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:41:40" (1/1) ... [2021-06-05 15:41:40,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 15:41:40,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 15:41:40,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 15:41:40,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 15:41:40,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:41:40" (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 15:41:40,184 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 15:41:40,184 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 15:41:40,184 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 15:41:40,184 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 15:41:40,184 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 15:41:40,184 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 15:41:40,184 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 15:41:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 15:41:40,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 15:41:40,185 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 15:41:40,298 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 15:41:40,298 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 15:41:40,299 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 15:41:40,300 INFO L202 PluginConnector]: Adding new model send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:41:40 BoogieIcfgContainer [2021-06-05 15:41:40,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 15:41:40,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 15:41:40,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 15:41:40,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 15:41:40,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:41:40" (1/2) ... [2021-06-05 15:41:40,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e639d2 and model type send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:41:40, skipping insertion in model container [2021-06-05 15:41:40,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:41:40" (2/2) ... [2021-06-05 15:41:40,304 INFO L111 eAbstractionObserver]: Analyzing ICFG send-receive-alt.wvr.bpl [2021-06-05 15:41:40,308 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 15:41:40,308 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 15:41:40,308 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 15:41:40,309 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 15:41:40,328 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 15:41:40,341 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 15:41:40,353 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 15:41:40,353 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 15:41:40,353 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 15:41:40,354 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 15:41:40,354 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 15:41:40,354 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 15:41:40,354 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 15:41:40,354 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 15:41:40,360 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 58 flow [2021-06-05 15:41:40,370 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:40,381 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:40,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 15:41:40,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:40,391 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:40,391 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:40,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:40,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1070659179, now seen corresponding path program 1 times [2021-06-05 15:41:40,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:40,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336879235] [2021-06-05 15:41:40,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:40,513 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 15:41:40,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:40,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336879235] [2021-06-05 15:41:40,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336879235] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:41:40,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:41:40,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:41:40,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943060083] [2021-06-05 15:41:40,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:41:40,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:40,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:41:40,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:41:40,527 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 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 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:40,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:40,539 INFO L93 Difference]: Finished difference Result 42 states and 82 transitions. [2021-06-05 15:41:40,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:41:40,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 15:41:40,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:40,546 INFO L225 Difference]: With dead ends: 42 [2021-06-05 15:41:40,546 INFO L226 Difference]: Without dead ends: 30 [2021-06-05 15:41:40,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:41:40,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-06-05 15:41:40,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-06-05 15:41:40,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:40,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 57 transitions. [2021-06-05 15:41:40,573 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 57 transitions. Word has length 11 [2021-06-05 15:41:40,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:40,574 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 57 transitions. [2021-06-05 15:41:40,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:40,575 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 57 transitions. [2021-06-05 15:41:40,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 15:41:40,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:40,575 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:40,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 15:41:40,576 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:40,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:40,581 INFO L82 PathProgramCache]: Analyzing trace with hash -616411682, now seen corresponding path program 1 times [2021-06-05 15:41:40,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:40,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301004259] [2021-06-05 15:41:40,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:40,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:40,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301004259] [2021-06-05 15:41:40,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301004259] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:41:40,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:41:40,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 15:41:40,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248191696] [2021-06-05 15:41:40,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:41:40,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:40,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:41:40,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:41:40,619 INFO L87 Difference]: Start difference. First operand 30 states and 57 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:40,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:40,634 INFO L93 Difference]: Finished difference Result 32 states and 57 transitions. [2021-06-05 15:41:40,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:41:40,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 15:41:40,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:40,636 INFO L225 Difference]: With dead ends: 32 [2021-06-05 15:41:40,636 INFO L226 Difference]: Without dead ends: 31 [2021-06-05 15:41:40,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:41:40,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-06-05 15:41:40,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-06-05 15:41:40,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 56 transitions. [2021-06-05 15:41:40,649 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 56 transitions. Word has length 12 [2021-06-05 15:41:40,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:40,649 INFO L482 AbstractCegarLoop]: Abstraction has 31 states and 56 transitions. [2021-06-05 15:41:40,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:40,649 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 56 transitions. [2021-06-05 15:41:40,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 15:41:40,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:40,650 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:40,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 15:41:40,650 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:40,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:40,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1444335643, now seen corresponding path program 1 times [2021-06-05 15:41:40,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:40,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978555509] [2021-06-05 15:41:40,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:40,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:40,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:40,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978555509] [2021-06-05 15:41:40,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978555509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:40,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747249216] [2021-06-05 15:41:40,724 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 15:41:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:40,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:41:40,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:40,884 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 16 treesize of output 10 [2021-06-05 15:41:40,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:40,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:40,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:40,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:7 [2021-06-05 15:41:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:40,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747249216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:40,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:40,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 15:41:40,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157037217] [2021-06-05 15:41:40,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:41:40,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:40,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:41:40,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:41:40,929 INFO L87 Difference]: Start difference. First operand 31 states and 56 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:40,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:40,985 INFO L93 Difference]: Finished difference Result 52 states and 101 transitions. [2021-06-05 15:41:40,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:41:40,986 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 15:41:40,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:40,986 INFO L225 Difference]: With dead ends: 52 [2021-06-05 15:41:40,986 INFO L226 Difference]: Without dead ends: 41 [2021-06-05 15:41:40,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:41:40,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-06-05 15:41:40,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-06-05 15:41:40,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:40,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-06-05 15:41:40,990 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 15 [2021-06-05 15:41:40,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:40,991 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-06-05 15:41:40,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:40,991 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-06-05 15:41:40,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 15:41:40,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:40,991 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:41,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 15:41:41,209 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:41,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:41,209 INFO L82 PathProgramCache]: Analyzing trace with hash -559632325, now seen corresponding path program 1 times [2021-06-05 15:41:41,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:41,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547129287] [2021-06-05 15:41:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:41,219 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 15:41:41,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:41,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547129287] [2021-06-05 15:41:41,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547129287] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:41:41,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:41:41,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:41:41,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270340005] [2021-06-05 15:41:41,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:41:41,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:41,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:41:41,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:41:41,221 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:41,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:41,230 INFO L93 Difference]: Finished difference Result 40 states and 75 transitions. [2021-06-05 15:41:41,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:41:41,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 15:41:41,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:41,231 INFO L225 Difference]: With dead ends: 40 [2021-06-05 15:41:41,231 INFO L226 Difference]: Without dead ends: 40 [2021-06-05 15:41:41,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:41:41,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-06-05 15:41:41,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2021-06-05 15:41:41,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:41,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 65 transitions. [2021-06-05 15:41:41,235 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 65 transitions. Word has length 15 [2021-06-05 15:41:41,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:41,235 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 65 transitions. [2021-06-05 15:41:41,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:41,235 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 65 transitions. [2021-06-05 15:41:41,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 15:41:41,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:41,236 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:41,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 15:41:41,236 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:41,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:41,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1654899146, now seen corresponding path program 2 times [2021-06-05 15:41:41,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:41,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093858615] [2021-06-05 15:41:41,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:41,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:41,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:41,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:41,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093858615] [2021-06-05 15:41:41,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093858615] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:41:41,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:41:41,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 15:41:41,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22924723] [2021-06-05 15:41:41,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:41:41,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:41,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:41:41,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:41:41,277 INFO L87 Difference]: Start difference. First operand 35 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:41,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:41,305 INFO L93 Difference]: Finished difference Result 86 states and 160 transitions. [2021-06-05 15:41:41,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:41:41,312 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 15:41:41,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:41,314 INFO L225 Difference]: With dead ends: 86 [2021-06-05 15:41:41,314 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 15:41:41,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:41:41,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 15:41:41,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 58. [2021-06-05 15:41:41,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 117 transitions. [2021-06-05 15:41:41,322 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 117 transitions. Word has length 16 [2021-06-05 15:41:41,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:41,322 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 117 transitions. [2021-06-05 15:41:41,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:41,322 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 117 transitions. [2021-06-05 15:41:41,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:41:41,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:41,322 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:41,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 15:41:41,323 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:41,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:41,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1100878499, now seen corresponding path program 3 times [2021-06-05 15:41:41,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:41,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259341833] [2021-06-05 15:41:41,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:41,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:41,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:41,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259341833] [2021-06-05 15:41:41,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259341833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:41,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171241098] [2021-06-05 15:41:41,344 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 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 15:41:41,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:41:41,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:41,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 15:41:41,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:41,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171241098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:41,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:41,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 15:41:41,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861820857] [2021-06-05 15:41:41,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:41:41,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:41,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:41:41,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:41:41,419 INFO L87 Difference]: Start difference. First operand 58 states and 117 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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 15:41:41,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:41,430 INFO L93 Difference]: Finished difference Result 79 states and 150 transitions. [2021-06-05 15:41:41,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:41:41,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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 15:41:41,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:41,433 INFO L225 Difference]: With dead ends: 79 [2021-06-05 15:41:41,433 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 15:41:41,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:41:41,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 15:41:41,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-06-05 15:41:41,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:41,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 139 transitions. [2021-06-05 15:41:41,440 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 139 transitions. Word has length 19 [2021-06-05 15:41:41,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:41,440 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 139 transitions. [2021-06-05 15:41:41,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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 15:41:41,440 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 139 transitions. [2021-06-05 15:41:41,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:41:41,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:41,441 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:41,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:41,657 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:41,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:41,657 INFO L82 PathProgramCache]: Analyzing trace with hash -903089469, now seen corresponding path program 1 times [2021-06-05 15:41:41,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:41,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729337841] [2021-06-05 15:41:41,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:41,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:41,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729337841] [2021-06-05 15:41:41,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729337841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:41,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71987112] [2021-06-05 15:41:41,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:41:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:41,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:41:41,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:41,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:41,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:41,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:41,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 15:41:41,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:41,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:41,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:41,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:7 [2021-06-05 15:41:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:41,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71987112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:41,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:41,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 15:41:41,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381103912] [2021-06-05 15:41:41,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:41:41,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:41,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:41:41,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:41:41,930 INFO L87 Difference]: Start difference. First operand 69 states and 139 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:41,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:41,974 INFO L93 Difference]: Finished difference Result 106 states and 220 transitions. [2021-06-05 15:41:41,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:41:41,975 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 15:41:41,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:41,976 INFO L225 Difference]: With dead ends: 106 [2021-06-05 15:41:41,976 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 15:41:41,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:41:41,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 15:41:41,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2021-06-05 15:41:41,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:41,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-06-05 15:41:41,988 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 19 [2021-06-05 15:41:41,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:41,988 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-06-05 15:41:41,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:41,988 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-06-05 15:41:41,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:41:41,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:41,989 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:42,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:42,195 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:42,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:42,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1021604339, now seen corresponding path program 2 times [2021-06-05 15:41:42,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:42,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599699635] [2021-06-05 15:41:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:42,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:42,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:42,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599699635] [2021-06-05 15:41:42,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599699635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:42,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788639680] [2021-06-05 15:41:42,276 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 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 15:41:42,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:41:42,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:42,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:41:42,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:42,375 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:41:42,375 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 15:41:42,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:42,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:42,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:42,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:7 [2021-06-05 15:41:42,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:42,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788639680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:42,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:42,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 15:41:42,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165647140] [2021-06-05 15:41:42,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:41:42,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:42,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:41:42,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:41:42,391 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:42,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:42,425 INFO L93 Difference]: Finished difference Result 111 states and 224 transitions. [2021-06-05 15:41:42,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:41:42,425 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 15:41:42,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:42,426 INFO L225 Difference]: With dead ends: 111 [2021-06-05 15:41:42,426 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 15:41:42,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:41:42,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 15:41:42,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2021-06-05 15:41:42,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 81 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:42,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 163 transitions. [2021-06-05 15:41:42,438 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 163 transitions. Word has length 19 [2021-06-05 15:41:42,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:42,438 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 163 transitions. [2021-06-05 15:41:42,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:42,438 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 163 transitions. [2021-06-05 15:41:42,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:41:42,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:42,441 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:42,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:42,658 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:42,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:42,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1435130610, now seen corresponding path program 3 times [2021-06-05 15:41:42,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:42,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914827353] [2021-06-05 15:41:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:42,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:42,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:42,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914827353] [2021-06-05 15:41:42,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914827353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:42,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552857209] [2021-06-05 15:41:42,689 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 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 15:41:42,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:41:42,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:42,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:41:42,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:42,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552857209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:42,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:42,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 15:41:42,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384876445] [2021-06-05 15:41:42,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:41:42,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:42,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:41:42,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:41:42,763 INFO L87 Difference]: Start difference. First operand 82 states and 163 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 15:41:42,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:42,784 INFO L93 Difference]: Finished difference Result 178 states and 344 transitions. [2021-06-05 15:41:42,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:41:42,784 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 20 [2021-06-05 15:41:42,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:42,785 INFO L225 Difference]: With dead ends: 178 [2021-06-05 15:41:42,785 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 15:41:42,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:41:42,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 15:41:42,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 100. [2021-06-05 15:41:42,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.090909090909091) internal successors, (207), 99 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:42,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 207 transitions. [2021-06-05 15:41:42,794 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 207 transitions. Word has length 20 [2021-06-05 15:41:42,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:42,794 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 207 transitions. [2021-06-05 15:41:42,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 15:41:42,794 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 207 transitions. [2021-06-05 15:41:42,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:41:42,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:42,795 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:43,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:43,009 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:43,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:43,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1953390261, now seen corresponding path program 4 times [2021-06-05 15:41:43,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:43,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029410867] [2021-06-05 15:41:43,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:43,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:43,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029410867] [2021-06-05 15:41:43,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029410867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:43,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657226360] [2021-06-05 15:41:43,169 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 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 15:41:43,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:41:43,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:43,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:41:43,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:43,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:43,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:43,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:43,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:43,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:43,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:43,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:43,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-06-05 15:41:43,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:43,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:43,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:43,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 15:41:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:43,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657226360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:43,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:43,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 15:41:43,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176772763] [2021-06-05 15:41:43,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:41:43,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:43,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:41:43,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:41:43,333 INFO L87 Difference]: Start difference. First operand 100 states and 207 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 15:41:43,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:43,458 INFO L93 Difference]: Finished difference Result 229 states and 467 transitions. [2021-06-05 15:41:43,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:41:43,458 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 23 [2021-06-05 15:41:43,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:43,460 INFO L225 Difference]: With dead ends: 229 [2021-06-05 15:41:43,460 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 15:41:43,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 200.2ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:41:43,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 15:41:43,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 124. [2021-06-05 15:41:43,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.048780487804878) internal successors, (252), 123 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:43,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 252 transitions. [2021-06-05 15:41:43,463 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 252 transitions. Word has length 23 [2021-06-05 15:41:43,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:43,463 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 252 transitions. [2021-06-05 15:41:43,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 15:41:43,463 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 252 transitions. [2021-06-05 15:41:43,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:41:43,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:43,464 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:43,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:43,681 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:43,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:43,681 INFO L82 PathProgramCache]: Analyzing trace with hash -39199557, now seen corresponding path program 5 times [2021-06-05 15:41:43,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:43,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904431698] [2021-06-05 15:41:43,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:43,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:43,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904431698] [2021-06-05 15:41:43,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904431698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:43,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83505494] [2021-06-05 15:41:43,804 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 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 15:41:43,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:41:43,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:43,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:41:43,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:43,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:43,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:43,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:43,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:43,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:43,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:43,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-06-05 15:41:43,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:43,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:43,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:43,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 15:41:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:43,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83505494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:43,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:43,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 15:41:43,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980428094] [2021-06-05 15:41:43,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:41:43,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:43,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:41:43,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:41:43,977 INFO L87 Difference]: Start difference. First operand 124 states and 252 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 15:41:44,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:44,063 INFO L93 Difference]: Finished difference Result 242 states and 510 transitions. [2021-06-05 15:41:44,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:41:44,063 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 23 [2021-06-05 15:41:44,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:44,064 INFO L225 Difference]: With dead ends: 242 [2021-06-05 15:41:44,065 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 15:41:44,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:41:44,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 15:41:44,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 127. [2021-06-05 15:41:44,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.0476190476190474) internal successors, (258), 126 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:44,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 258 transitions. [2021-06-05 15:41:44,068 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 258 transitions. Word has length 23 [2021-06-05 15:41:44,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:44,069 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 258 transitions. [2021-06-05 15:41:44,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 15:41:44,069 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 258 transitions. [2021-06-05 15:41:44,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:41:44,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:44,069 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:44,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:44,285 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:44,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:44,285 INFO L82 PathProgramCache]: Analyzing trace with hash -493418373, now seen corresponding path program 6 times [2021-06-05 15:41:44,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:44,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978476399] [2021-06-05 15:41:44,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:44,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:44,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:44,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978476399] [2021-06-05 15:41:44,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978476399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:44,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076878944] [2021-06-05 15:41:44,398 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 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 15:41:44,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:41:44,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:44,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:41:44,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:44,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:44,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:44,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:44,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:44,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-06-05 15:41:44,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:44,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:44,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:44,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 15:41:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:44,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076878944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:44,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:44,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 15:41:44,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715856933] [2021-06-05 15:41:44,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:41:44,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:44,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:41:44,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:41:44,561 INFO L87 Difference]: Start difference. First operand 127 states and 258 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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 15:41:44,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:44,691 INFO L93 Difference]: Finished difference Result 370 states and 737 transitions. [2021-06-05 15:41:44,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:41:44,692 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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 23 [2021-06-05 15:41:44,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:44,693 INFO L225 Difference]: With dead ends: 370 [2021-06-05 15:41:44,693 INFO L226 Difference]: Without dead ends: 231 [2021-06-05 15:41:44,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 196.0ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:41:44,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-05 15:41:44,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 139. [2021-06-05 15:41:44,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 138 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:44,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 279 transitions. [2021-06-05 15:41:44,698 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 279 transitions. Word has length 23 [2021-06-05 15:41:44,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:44,698 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 279 transitions. [2021-06-05 15:41:44,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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 15:41:44,698 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 279 transitions. [2021-06-05 15:41:44,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:41:44,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:44,699 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:44,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 15:41:44,909 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:44,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:44,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1420772331, now seen corresponding path program 7 times [2021-06-05 15:41:44,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:44,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295780486] [2021-06-05 15:41:44,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:44,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:44,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:44,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295780486] [2021-06-05 15:41:44,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295780486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:44,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025068777] [2021-06-05 15:41:44,995 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 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 15:41:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:45,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:41:45,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:45,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:45,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:45,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:45,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:45,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-06-05 15:41:45,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:45,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:45,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:45,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 15:41:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:45,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025068777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:45,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:45,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 15:41:45,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437247325] [2021-06-05 15:41:45,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:41:45,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:45,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:41:45,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:41:45,173 INFO L87 Difference]: Start difference. First operand 139 states and 279 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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 15:41:45,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:45,264 INFO L93 Difference]: Finished difference Result 296 states and 627 transitions. [2021-06-05 15:41:45,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:41:45,265 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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 23 [2021-06-05 15:41:45,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:45,267 INFO L225 Difference]: With dead ends: 296 [2021-06-05 15:41:45,267 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 15:41:45,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:41:45,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 15:41:45,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 115. [2021-06-05 15:41:45,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0526315789473686) internal successors, (234), 114 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:45,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 234 transitions. [2021-06-05 15:41:45,270 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 234 transitions. Word has length 23 [2021-06-05 15:41:45,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:45,270 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 234 transitions. [2021-06-05 15:41:45,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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 15:41:45,270 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 234 transitions. [2021-06-05 15:41:45,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:41:45,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:45,271 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:45,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:45,481 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:45,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:45,481 INFO L82 PathProgramCache]: Analyzing trace with hash 631142011, now seen corresponding path program 8 times [2021-06-05 15:41:45,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:45,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541536694] [2021-06-05 15:41:45,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:45,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:45,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:45,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541536694] [2021-06-05 15:41:45,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541536694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:45,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516452445] [2021-06-05 15:41:45,606 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 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 15:41:45,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:41:45,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:45,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:41:45,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:45,731 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:41:45,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 24 [2021-06-05 15:41:45,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:45,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:45,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:45,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:7 [2021-06-05 15:41:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:45,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516452445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:45,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:45,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 15:41:45,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903241113] [2021-06-05 15:41:45,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:41:45,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:45,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:41:45,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:41:45,747 INFO L87 Difference]: Start difference. First operand 115 states and 234 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 15:41:45,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:45,823 INFO L93 Difference]: Finished difference Result 174 states and 355 transitions. [2021-06-05 15:41:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:41:45,823 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 23 [2021-06-05 15:41:45,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:45,824 INFO L225 Difference]: With dead ends: 174 [2021-06-05 15:41:45,824 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 15:41:45,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:41:45,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 15:41:45,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2021-06-05 15:41:45,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.0578512396694215) internal successors, (249), 121 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:45,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 249 transitions. [2021-06-05 15:41:45,826 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 249 transitions. Word has length 23 [2021-06-05 15:41:45,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:45,826 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 249 transitions. [2021-06-05 15:41:45,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 15:41:45,827 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 249 transitions. [2021-06-05 15:41:45,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:41:45,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:45,827 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:46,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:46,042 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:46,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:46,042 INFO L82 PathProgramCache]: Analyzing trace with hash -2079266966, now seen corresponding path program 9 times [2021-06-05 15:41:46,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:46,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729951913] [2021-06-05 15:41:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:46,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:46,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729951913] [2021-06-05 15:41:46,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729951913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:46,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132959131] [2021-06-05 15:41:46,069 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 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 15:41:46,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:41:46,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:46,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:41:46,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:46,141 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:46,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132959131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:46,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:46,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 15:41:46,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925005617] [2021-06-05 15:41:46,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:41:46,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:46,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:41:46,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:41:46,143 INFO L87 Difference]: Start difference. First operand 122 states and 249 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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 15:41:46,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:46,161 INFO L93 Difference]: Finished difference Result 258 states and 510 transitions. [2021-06-05 15:41:46,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:41:46,161 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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 15:41:46,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:46,163 INFO L225 Difference]: With dead ends: 258 [2021-06-05 15:41:46,163 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 15:41:46,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:41:46,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 15:41:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 144. [2021-06-05 15:41:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.104895104895105) internal successors, (301), 143 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:46,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 301 transitions. [2021-06-05 15:41:46,172 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 301 transitions. Word has length 24 [2021-06-05 15:41:46,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:46,172 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 301 transitions. [2021-06-05 15:41:46,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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 15:41:46,172 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 301 transitions. [2021-06-05 15:41:46,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:41:46,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:46,173 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:46,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 15:41:46,381 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:46,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:46,381 INFO L82 PathProgramCache]: Analyzing trace with hash 573026147, now seen corresponding path program 10 times [2021-06-05 15:41:46,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:46,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098898946] [2021-06-05 15:41:46,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:46,530 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:46,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:46,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098898946] [2021-06-05 15:41:46,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098898946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:46,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522321805] [2021-06-05 15:41:46,531 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 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 15:41:46,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:41:46,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:46,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:41:46,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:46,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:46,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:46,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:46,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:46,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:46,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:46,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:46,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:46,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:46,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:46,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:46,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:46,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-06-05 15:41:46,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:46,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:46,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:46,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 15:41:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:46,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522321805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:46,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:46,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 15:41:46,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50563283] [2021-06-05 15:41:46,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:41:46,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:46,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:41:46,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:41:46,785 INFO L87 Difference]: Start difference. First operand 144 states and 301 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 15:41:46,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:46,985 INFO L93 Difference]: Finished difference Result 412 states and 832 transitions. [2021-06-05 15:41:46,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:41:46,986 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 27 [2021-06-05 15:41:46,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:46,987 INFO L225 Difference]: With dead ends: 412 [2021-06-05 15:41:46,987 INFO L226 Difference]: Without dead ends: 275 [2021-06-05 15:41:46,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 299.5ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:41:46,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-06-05 15:41:46,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 186. [2021-06-05 15:41:46,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.0324324324324325) internal successors, (376), 185 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:46,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 376 transitions. [2021-06-05 15:41:46,991 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 376 transitions. Word has length 27 [2021-06-05 15:41:46,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:46,991 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 376 transitions. [2021-06-05 15:41:46,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 15:41:46,991 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 376 transitions. [2021-06-05 15:41:46,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:41:46,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:46,991 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:47,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 15:41:47,205 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:47,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:47,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1797247341, now seen corresponding path program 11 times [2021-06-05 15:41:47,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:47,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180412480] [2021-06-05 15:41:47,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:47,342 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:47,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:47,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180412480] [2021-06-05 15:41:47,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180412480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:47,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300001279] [2021-06-05 15:41:47,343 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 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 15:41:47,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:41:47,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:47,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:41:47,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:47,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:47,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:47,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:47,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:47,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:47,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:47,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:47,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:47,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:47,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:47,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:47,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:47,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:47,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:47,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-06-05 15:41:47,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:47,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:47,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:47,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 15:41:47,603 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:47,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300001279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:47,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:47,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 15:41:47,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405799509] [2021-06-05 15:41:47,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:41:47,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:47,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:41:47,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:41:47,605 INFO L87 Difference]: Start difference. First operand 186 states and 376 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 15:41:47,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:47,709 INFO L93 Difference]: Finished difference Result 449 states and 948 transitions. [2021-06-05 15:41:47,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:41:47,709 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 27 [2021-06-05 15:41:47,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:47,711 INFO L225 Difference]: With dead ends: 449 [2021-06-05 15:41:47,711 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 15:41:47,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 230.2ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:41:47,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 15:41:47,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 204. [2021-06-05 15:41:47,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.0295566502463056) internal successors, (412), 203 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 412 transitions. [2021-06-05 15:41:47,715 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 412 transitions. Word has length 27 [2021-06-05 15:41:47,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:47,715 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 412 transitions. [2021-06-05 15:41:47,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 15:41:47,715 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 412 transitions. [2021-06-05 15:41:47,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:41:47,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:47,715 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:47,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 15:41:47,916 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:47,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:47,917 INFO L82 PathProgramCache]: Analyzing trace with hash 2033685859, now seen corresponding path program 12 times [2021-06-05 15:41:47,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:47,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94552761] [2021-06-05 15:41:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:48,059 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:48,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:48,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94552761] [2021-06-05 15:41:48,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94552761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:48,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291838099] [2021-06-05 15:41:48,059 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 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 15:41:48,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:41:48,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:48,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:41:48,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:48,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:48,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:48,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:48,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:48,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:48,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:48,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:48,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:48,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:48,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:48,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:48,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:48,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:48,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-06-05 15:41:48,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:48,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:48,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:48,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 15:41:48,318 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:48,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291838099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:48,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:48,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:41:48,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300918057] [2021-06-05 15:41:48,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:41:48,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:48,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:41:48,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:41:48,320 INFO L87 Difference]: Start difference. First operand 204 states and 412 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 15:41:48,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:48,442 INFO L93 Difference]: Finished difference Result 418 states and 869 transitions. [2021-06-05 15:41:48,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:41:48,442 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 27 [2021-06-05 15:41:48,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:48,444 INFO L225 Difference]: With dead ends: 418 [2021-06-05 15:41:48,444 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 15:41:48,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 241.5ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:41:48,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 15:41:48,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 204. [2021-06-05 15:41:48,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.0295566502463056) internal successors, (412), 203 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 412 transitions. [2021-06-05 15:41:48,447 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 412 transitions. Word has length 27 [2021-06-05 15:41:48,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:48,448 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 412 transitions. [2021-06-05 15:41:48,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 15:41:48,448 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 412 transitions. [2021-06-05 15:41:48,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:41:48,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:48,448 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:48,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:48,661 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:48,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:48,661 INFO L82 PathProgramCache]: Analyzing trace with hash 482737811, now seen corresponding path program 13 times [2021-06-05 15:41:48,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:48,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815522774] [2021-06-05 15:41:48,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:48,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:48,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815522774] [2021-06-05 15:41:48,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815522774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:48,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107372115] [2021-06-05 15:41:48,782 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 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 15:41:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:48,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:41:48,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:48,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:48,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:48,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:48,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:48,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:48,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:48,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:48,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:48,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:48,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:48,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:48,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-06-05 15:41:48,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:48,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:48,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:48,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 15:41:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:48,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107372115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:48,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:48,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-06-05 15:41:48,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661423953] [2021-06-05 15:41:48,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:41:48,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:48,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:41:48,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:41:48,986 INFO L87 Difference]: Start difference. First operand 204 states and 412 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 15:41:49,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:49,220 INFO L93 Difference]: Finished difference Result 607 states and 1212 transitions. [2021-06-05 15:41:49,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:41:49,221 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 27 [2021-06-05 15:41:49,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:49,222 INFO L225 Difference]: With dead ends: 607 [2021-06-05 15:41:49,222 INFO L226 Difference]: Without dead ends: 443 [2021-06-05 15:41:49,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 274.3ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:41:49,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-05 15:41:49,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 261. [2021-06-05 15:41:49,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.9923076923076923) internal successors, (518), 260 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:49,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 518 transitions. [2021-06-05 15:41:49,227 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 518 transitions. Word has length 27 [2021-06-05 15:41:49,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:49,227 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 518 transitions. [2021-06-05 15:41:49,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 15:41:49,227 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 518 transitions. [2021-06-05 15:41:49,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:41:49,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:49,227 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:49,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:49,441 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:49,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:49,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1943397523, now seen corresponding path program 14 times [2021-06-05 15:41:49,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:49,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32503340] [2021-06-05 15:41:49,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:49,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:49,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32503340] [2021-06-05 15:41:49,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32503340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:49,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872652133] [2021-06-05 15:41:49,560 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 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 15:41:49,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:41:49,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:49,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:41:49,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:49,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:49,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:49,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:49,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:49,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:49,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:49,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:49,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:49,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:49,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-06-05 15:41:49,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:49,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:49,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:49,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 15:41:49,794 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:49,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872652133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:49,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:49,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 15:41:49,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593212163] [2021-06-05 15:41:49,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:41:49,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:49,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:41:49,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:41:49,795 INFO L87 Difference]: Start difference. First operand 261 states and 518 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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 15:41:49,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:49,960 INFO L93 Difference]: Finished difference Result 566 states and 1153 transitions. [2021-06-05 15:41:49,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:41:49,960 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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 27 [2021-06-05 15:41:49,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:49,962 INFO L225 Difference]: With dead ends: 566 [2021-06-05 15:41:49,962 INFO L226 Difference]: Without dead ends: 514 [2021-06-05 15:41:49,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 197.5ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:41:49,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-05 15:41:49,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 291. [2021-06-05 15:41:49,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.9758620689655173) internal successors, (573), 290 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 15:41:49,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 573 transitions. [2021-06-05 15:41:49,967 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 573 transitions. Word has length 27 [2021-06-05 15:41:49,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:49,967 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 573 transitions. [2021-06-05 15:41:49,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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 15:41:49,967 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 573 transitions. [2021-06-05 15:41:49,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:41:49,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:49,968 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:50,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:50,181 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:50,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:50,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1497798365, now seen corresponding path program 15 times [2021-06-05 15:41:50,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:50,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700894489] [2021-06-05 15:41:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:50,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:50,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700894489] [2021-06-05 15:41:50,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700894489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:50,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724391283] [2021-06-05 15:41:50,326 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 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 15:41:50,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:41:50,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:50,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:41:50,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:50,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:50,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:50,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:50,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:50,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:50,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:50,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:50,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:50,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:50,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 31 [2021-06-05 15:41:50,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:50,946 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-06-05 15:41:50,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:50,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:88, output treesize:7 [2021-06-05 15:41:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:50,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724391283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:50,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:50,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-06-05 15:41:50,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692414051] [2021-06-05 15:41:50,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:41:50,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:50,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:41:50,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:41:50,958 INFO L87 Difference]: Start difference. First operand 291 states and 573 transitions. Second operand has 16 states, 16 states have (on average 2.1875) 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 15:41:51,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:51,312 INFO L93 Difference]: Finished difference Result 619 states and 1231 transitions. [2021-06-05 15:41:51,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:41:51,313 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) 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 27 [2021-06-05 15:41:51,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:51,314 INFO L225 Difference]: With dead ends: 619 [2021-06-05 15:41:51,314 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 15:41:51,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 671.2ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:41:51,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 15:41:51,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 321. [2021-06-05 15:41:51,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.971875) internal successors, (631), 320 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:51,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 631 transitions. [2021-06-05 15:41:51,319 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 631 transitions. Word has length 27 [2021-06-05 15:41:51,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:51,320 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 631 transitions. [2021-06-05 15:41:51,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) 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 15:41:51,320 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 631 transitions. [2021-06-05 15:41:51,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:41:51,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:51,320 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:51,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 15:41:51,534 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:51,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:51,534 INFO L82 PathProgramCache]: Analyzing trace with hash -37138653, now seen corresponding path program 16 times [2021-06-05 15:41:51,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:51,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582718478] [2021-06-05 15:41:51,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:51,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:51,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582718478] [2021-06-05 15:41:51,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582718478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:51,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034246816] [2021-06-05 15:41:51,695 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 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 15:41:51,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:41:51,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:51,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:41:51,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:51,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:51,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:51,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:51,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:51,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:51,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:51,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:51,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-06-05 15:41:51,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:51,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:51,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:51,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 15:41:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:51,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034246816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:51,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:51,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 15:41:51,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328707677] [2021-06-05 15:41:51,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:41:51,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:51,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:41:51,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:41:51,907 INFO L87 Difference]: Start difference. First operand 321 states and 631 transitions. Second operand has 16 states, 16 states have (on average 2.125) 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 15:41:52,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:52,060 INFO L93 Difference]: Finished difference Result 631 states and 1284 transitions. [2021-06-05 15:41:52,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:41:52,061 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) 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 27 [2021-06-05 15:41:52,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:52,062 INFO L225 Difference]: With dead ends: 631 [2021-06-05 15:41:52,063 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 15:41:52,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 219.3ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:41:52,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 15:41:52,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 321. [2021-06-05 15:41:52,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.971875) internal successors, (631), 320 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:52,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 631 transitions. [2021-06-05 15:41:52,068 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 631 transitions. Word has length 27 [2021-06-05 15:41:52,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:52,068 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 631 transitions. [2021-06-05 15:41:52,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) 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 15:41:52,068 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 631 transitions. [2021-06-05 15:41:52,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:41:52,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:52,068 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:52,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 15:41:52,277 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:52,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:52,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1537293741, now seen corresponding path program 17 times [2021-06-05 15:41:52,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:52,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348943896] [2021-06-05 15:41:52,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:52,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:52,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348943896] [2021-06-05 15:41:52,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348943896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:52,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374183137] [2021-06-05 15:41:52,395 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 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 15:41:52,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:41:52,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:52,425 WARN L261 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:41:52,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:52,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:52,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:52,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:52,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:52,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:52,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:52,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:52,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:52,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-06-05 15:41:52,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:52,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:52,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:52,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 15:41:52,625 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:52,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374183137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:52,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:52,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 15:41:52,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839867629] [2021-06-05 15:41:52,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:41:52,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:52,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:41:52,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:41:52,626 INFO L87 Difference]: Start difference. First operand 321 states and 631 transitions. Second operand has 16 states, 16 states have (on average 2.0) 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 15:41:52,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:52,804 INFO L93 Difference]: Finished difference Result 654 states and 1288 transitions. [2021-06-05 15:41:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:41:52,805 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) 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 27 [2021-06-05 15:41:52,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:52,808 INFO L225 Difference]: With dead ends: 654 [2021-06-05 15:41:52,808 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 15:41:52,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:41:52,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 15:41:52,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 355. [2021-06-05 15:41:52,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.9802259887005649) internal successors, (701), 354 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:52,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 701 transitions. [2021-06-05 15:41:52,813 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 701 transitions. Word has length 27 [2021-06-05 15:41:52,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:52,813 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 701 transitions. [2021-06-05 15:41:52,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) 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 15:41:52,813 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 701 transitions. [2021-06-05 15:41:52,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:41:52,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:52,814 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:53,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 15:41:53,029 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:53,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:53,029 INFO L82 PathProgramCache]: Analyzing trace with hash -326297685, now seen corresponding path program 18 times [2021-06-05 15:41:53,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:53,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846918058] [2021-06-05 15:41:53,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:53,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:53,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846918058] [2021-06-05 15:41:53,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846918058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:53,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188449434] [2021-06-05 15:41:53,189 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 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 15:41:53,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:41:53,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:53,229 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:41:53,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:53,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:53,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:53,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:53,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:53,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:53,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:53,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:53,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:53,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:53,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:53,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:53,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:53,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:53,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:53,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:53,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:53,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:53,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:53,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:53,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:53,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 15:41:53,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:53,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:53,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:53,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 15:41:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:53,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188449434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:53,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:53,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 15:41:53,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896510437] [2021-06-05 15:41:53,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:41:53,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:53,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:41:53,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:41:53,520 INFO L87 Difference]: Start difference. First operand 355 states and 701 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:53,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:53,699 INFO L93 Difference]: Finished difference Result 666 states and 1349 transitions. [2021-06-05 15:41:53,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:41:53,699 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:41:53,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:53,701 INFO L225 Difference]: With dead ends: 666 [2021-06-05 15:41:53,701 INFO L226 Difference]: Without dead ends: 629 [2021-06-05 15:41:53,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 321.7ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:41:53,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-05 15:41:53,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 364. [2021-06-05 15:41:53,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 1.9724517906336088) internal successors, (716), 363 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:53,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 716 transitions. [2021-06-05 15:41:53,707 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 716 transitions. Word has length 31 [2021-06-05 15:41:53,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:53,707 INFO L482 AbstractCegarLoop]: Abstraction has 364 states and 716 transitions. [2021-06-05 15:41:53,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:53,707 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 716 transitions. [2021-06-05 15:41:53,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:41:53,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:53,707 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:53,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 15:41:53,929 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:53,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:53,929 INFO L82 PathProgramCache]: Analyzing trace with hash 656635163, now seen corresponding path program 19 times [2021-06-05 15:41:53,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:53,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177924026] [2021-06-05 15:41:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:54,069 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:54,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:54,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177924026] [2021-06-05 15:41:54,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177924026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:54,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636656079] [2021-06-05 15:41:54,069 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 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 15:41:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:54,094 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:41:54,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:54,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:54,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:54,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:54,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:54,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:54,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:54,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:54,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:54,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:54,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:54,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:54,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:54,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:54,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:54,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:54,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:54,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:54,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:54,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:54,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:54,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:54,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:54,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:54,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 15:41:54,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:54,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:54,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:54,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 15:41:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:54,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636656079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:54,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:54,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 15:41:54,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041950188] [2021-06-05 15:41:54,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:41:54,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:54,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:41:54,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:41:54,393 INFO L87 Difference]: Start difference. First operand 364 states and 716 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:54,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:54,600 INFO L93 Difference]: Finished difference Result 559 states and 1114 transitions. [2021-06-05 15:41:54,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:41:54,600 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:41:54,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:54,602 INFO L225 Difference]: With dead ends: 559 [2021-06-05 15:41:54,602 INFO L226 Difference]: Without dead ends: 532 [2021-06-05 15:41:54,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 375.4ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:41:54,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-05 15:41:54,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 332. [2021-06-05 15:41:54,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.9667673716012084) internal successors, (651), 331 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:54,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 651 transitions. [2021-06-05 15:41:54,607 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 651 transitions. Word has length 31 [2021-06-05 15:41:54,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:54,607 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 651 transitions. [2021-06-05 15:41:54,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:54,607 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 651 transitions. [2021-06-05 15:41:54,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:41:54,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:54,608 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:54,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 15:41:54,821 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:54,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:54,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1781195547, now seen corresponding path program 20 times [2021-06-05 15:41:54,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:54,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052221307] [2021-06-05 15:41:54,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:54,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:54,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052221307] [2021-06-05 15:41:54,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052221307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:54,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654945796] [2021-06-05 15:41:54,951 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 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 15:41:54,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:41:54,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:54,976 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:41:54,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:55,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:55,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:55,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:55,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:55,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:55,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:55,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:55,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:55,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:55,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:55,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:55,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:55,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:55,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:55,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:55,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:55,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:55,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:55,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:55,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:55,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:55,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:55,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:55,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 15:41:55,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:55,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:55,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:55,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 15:41:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:55,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654945796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:55,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:55,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 15:41:55,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373399452] [2021-06-05 15:41:55,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:41:55,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:55,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:41:55,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:41:55,261 INFO L87 Difference]: Start difference. First operand 332 states and 651 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:55,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:55,410 INFO L93 Difference]: Finished difference Result 724 states and 1487 transitions. [2021-06-05 15:41:55,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:41:55,410 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:41:55,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:55,412 INFO L225 Difference]: With dead ends: 724 [2021-06-05 15:41:55,412 INFO L226 Difference]: Without dead ends: 666 [2021-06-05 15:41:55,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 296.2ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:41:55,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-06-05 15:41:55,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 287. [2021-06-05 15:41:55,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.013986013986014) internal successors, (576), 286 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:55,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 576 transitions. [2021-06-05 15:41:55,417 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 576 transitions. Word has length 31 [2021-06-05 15:41:55,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:55,417 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 576 transitions. [2021-06-05 15:41:55,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:55,418 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 576 transitions. [2021-06-05 15:41:55,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:41:55,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:55,418 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:55,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:55,626 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:55,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:55,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1328876565, now seen corresponding path program 21 times [2021-06-05 15:41:55,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:55,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517381320] [2021-06-05 15:41:55,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:55,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:55,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517381320] [2021-06-05 15:41:55,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517381320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:55,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529256843] [2021-06-05 15:41:55,797 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 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 15:41:55,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:41:55,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:55,823 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:41:55,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:56,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:56,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:56,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:56,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:56,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 15:41:56,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:56,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:56,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:56,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 15:41:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:56,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529256843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:56,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:56,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 15:41:56,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11883606] [2021-06-05 15:41:56,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:41:56,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:56,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:41:56,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:41:56,111 INFO L87 Difference]: Start difference. First operand 287 states and 576 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:56,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:56,307 INFO L93 Difference]: Finished difference Result 700 states and 1406 transitions. [2021-06-05 15:41:56,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:41:56,307 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:41:56,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:56,308 INFO L225 Difference]: With dead ends: 700 [2021-06-05 15:41:56,308 INFO L226 Difference]: Without dead ends: 523 [2021-06-05 15:41:56,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 388.0ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:41:56,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-05 15:41:56,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 326. [2021-06-05 15:41:56,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.9938461538461538) internal successors, (648), 325 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:56,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 648 transitions. [2021-06-05 15:41:56,319 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 648 transitions. Word has length 31 [2021-06-05 15:41:56,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:56,319 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 648 transitions. [2021-06-05 15:41:56,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:56,319 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 648 transitions. [2021-06-05 15:41:56,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:41:56,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:56,320 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:56,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 15:41:56,539 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:56,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:56,541 INFO L82 PathProgramCache]: Analyzing trace with hash -204316181, now seen corresponding path program 22 times [2021-06-05 15:41:56,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:56,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840220841] [2021-06-05 15:41:56,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:56,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:56,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840220841] [2021-06-05 15:41:56,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840220841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:56,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534797463] [2021-06-05 15:41:56,693 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 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 15:41:56,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:41:56,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:56,721 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:41:56,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:56,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:56,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:56,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:57,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:57,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:57,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:57,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:57,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:57,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:57,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:57,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:57,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:57,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:57,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:57,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:57,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:57,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:57,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:57,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 15:41:57,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:57,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:57,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:57,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 15:41:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:57,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534797463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:57,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:57,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 15:41:57,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926201027] [2021-06-05 15:41:57,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:41:57,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:57,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:41:57,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:41:57,026 INFO L87 Difference]: Start difference. First operand 326 states and 648 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:57,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:57,321 INFO L93 Difference]: Finished difference Result 672 states and 1391 transitions. [2021-06-05 15:41:57,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:41:57,322 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:41:57,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:57,323 INFO L225 Difference]: With dead ends: 672 [2021-06-05 15:41:57,323 INFO L226 Difference]: Without dead ends: 617 [2021-06-05 15:41:57,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 330.0ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:41:57,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-06-05 15:41:57,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 293. [2021-06-05 15:41:57,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.0136986301369864) internal successors, (588), 292 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:57,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 588 transitions. [2021-06-05 15:41:57,329 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 588 transitions. Word has length 31 [2021-06-05 15:41:57,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:57,329 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 588 transitions. [2021-06-05 15:41:57,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:57,329 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 588 transitions. [2021-06-05 15:41:57,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:41:57,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:57,330 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:57,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:57,545 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:57,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:57,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1086947675, now seen corresponding path program 23 times [2021-06-05 15:41:57,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:57,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071318404] [2021-06-05 15:41:57,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:57,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:57,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071318404] [2021-06-05 15:41:57,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071318404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:57,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484845039] [2021-06-05 15:41:57,701 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 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 15:41:57,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:41:57,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:57,727 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 15:41:57,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:58,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:58,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:58,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:58,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:58,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:58,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:58,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:58,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:58,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:58,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:58,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:58,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:58,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:58,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:58,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:58,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:58,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:58,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:58,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:58,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:58,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:58,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:58,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:58,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:58,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:58,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 28 [2021-06-05 15:41:58,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:58,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:58,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:58,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:3 [2021-06-05 15:41:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:58,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484845039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:58,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:58,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 15:41:58,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804323041] [2021-06-05 15:41:58,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:41:58,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:58,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:41:58,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:41:58,081 INFO L87 Difference]: Start difference. First operand 293 states and 588 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:58,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:58,965 INFO L93 Difference]: Finished difference Result 703 states and 1400 transitions. [2021-06-05 15:41:58,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:41:58,965 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:41:58,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:58,967 INFO L225 Difference]: With dead ends: 703 [2021-06-05 15:41:58,967 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 15:41:58,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 833.4ms TimeCoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:41:58,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 15:41:58,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 323. [2021-06-05 15:41:58,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.9968944099378882) internal successors, (643), 322 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:58,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 643 transitions. [2021-06-05 15:41:58,972 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 643 transitions. Word has length 31 [2021-06-05 15:41:58,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:58,972 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 643 transitions. [2021-06-05 15:41:58,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:58,972 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 643 transitions. [2021-06-05 15:41:58,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:41:58,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:58,973 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:59,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 15:41:59,173 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:59,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:59,173 INFO L82 PathProgramCache]: Analyzing trace with hash 407681163, now seen corresponding path program 24 times [2021-06-05 15:41:59,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:59,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102894762] [2021-06-05 15:41:59,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:59,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:59,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102894762] [2021-06-05 15:41:59,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102894762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:59,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780477829] [2021-06-05 15:41:59,339 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 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 15:41:59,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:41:59,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:59,372 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:41:59,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:59,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:59,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:59,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:59,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:59,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:59,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:59,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:59,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:59,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:59,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:59,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:59,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:59,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:59,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:59,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:59,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:59,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:59,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:59,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:59,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 15:41:59,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:59,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:59,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:59,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 15:41:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:59,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780477829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:59,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:59,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 15:41:59,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127983766] [2021-06-05 15:41:59,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:41:59,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:59,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:41:59,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:41:59,687 INFO L87 Difference]: Start difference. First operand 323 states and 643 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:59,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:59,910 INFO L93 Difference]: Finished difference Result 636 states and 1284 transitions. [2021-06-05 15:41:59,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:41:59,910 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:41:59,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:59,912 INFO L225 Difference]: With dead ends: 636 [2021-06-05 15:41:59,912 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 15:41:59,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 315.1ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:41:59,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 15:41:59,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 305. [2021-06-05 15:41:59,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.0065789473684212) internal successors, (610), 304 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:59,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 610 transitions. [2021-06-05 15:41:59,921 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 610 transitions. Word has length 31 [2021-06-05 15:41:59,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:59,921 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 610 transitions. [2021-06-05 15:41:59,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:59,921 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 610 transitions. [2021-06-05 15:41:59,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:41:59,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:59,921 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:00,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:00,137 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:00,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:00,137 INFO L82 PathProgramCache]: Analyzing trace with hash -574822485, now seen corresponding path program 25 times [2021-06-05 15:42:00,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:00,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272434683] [2021-06-05 15:42:00,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:00,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:00,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272434683] [2021-06-05 15:42:00,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272434683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:00,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931530119] [2021-06-05 15:42:00,297 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 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 15:42:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:00,320 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:42:00,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:00,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:00,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:00,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:00,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:00,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:00,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:00,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:00,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:00,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:00,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:00,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:00,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:00,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:00,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 15:42:00,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:00,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:00,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:00,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 15:42:00,561 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:00,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931530119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:00,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:00,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-06-05 15:42:00,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096954413] [2021-06-05 15:42:00,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:42:00,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:00,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:42:00,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:42:00,562 INFO L87 Difference]: Start difference. First operand 305 states and 610 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:00,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:00,893 INFO L93 Difference]: Finished difference Result 779 states and 1533 transitions. [2021-06-05 15:42:00,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:42:00,893 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:42:00,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:00,894 INFO L225 Difference]: With dead ends: 779 [2021-06-05 15:42:00,894 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 15:42:00,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 415.3ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:42:00,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 15:42:00,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 352. [2021-06-05 15:42:00,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.9658119658119657) internal successors, (690), 351 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:00,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 690 transitions. [2021-06-05 15:42:00,899 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 690 transitions. Word has length 31 [2021-06-05 15:42:00,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:00,899 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 690 transitions. [2021-06-05 15:42:00,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:00,900 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 690 transitions. [2021-06-05 15:42:00,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:42:00,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:00,900 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:01,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 15:42:01,116 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:01,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:01,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1100362325, now seen corresponding path program 26 times [2021-06-05 15:42:01,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:01,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365920049] [2021-06-05 15:42:01,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:01,293 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:01,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:01,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365920049] [2021-06-05 15:42:01,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365920049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:01,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497608205] [2021-06-05 15:42:01,294 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 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 15:42:01,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:42:01,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:01,317 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:42:01,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:01,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:01,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:01,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:01,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:01,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:01,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:01,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:01,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:01,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:01,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:01,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:01,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:01,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:01,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 15:42:01,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:01,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:01,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:01,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 15:42:01,588 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:01,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497608205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:01,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:01,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-06-05 15:42:01,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293984604] [2021-06-05 15:42:01,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:42:01,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:01,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:42:01,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:42:01,589 INFO L87 Difference]: Start difference. First operand 352 states and 690 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:01,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:01,905 INFO L93 Difference]: Finished difference Result 731 states and 1404 transitions. [2021-06-05 15:42:01,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:42:01,906 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:42:01,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:01,907 INFO L225 Difference]: With dead ends: 731 [2021-06-05 15:42:01,907 INFO L226 Difference]: Without dead ends: 505 [2021-06-05 15:42:01,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 427.6ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:42:01,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-05 15:42:01,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 260. [2021-06-05 15:42:01,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.8725868725868726) internal successors, (485), 259 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:01,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 485 transitions. [2021-06-05 15:42:01,916 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 485 transitions. Word has length 31 [2021-06-05 15:42:01,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:01,916 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 485 transitions. [2021-06-05 15:42:01,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:01,916 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 485 transitions. [2021-06-05 15:42:01,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:42:01,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:01,916 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:02,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:02,129 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:02,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:02,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1315461915, now seen corresponding path program 27 times [2021-06-05 15:42:02,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:02,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734465608] [2021-06-05 15:42:02,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:02,288 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:02,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:02,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734465608] [2021-06-05 15:42:02,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734465608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:02,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048120439] [2021-06-05 15:42:02,288 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 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 15:42:02,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:42:02,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:02,313 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 15:42:02,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:02,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:02,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:02,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:02,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:02,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:02,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:02,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:02,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:02,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:02,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:02,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:02,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:02,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:02,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:02,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:02,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:02,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:02,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:02,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:02,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:02,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 15:42:02,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:02,605 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 15:42:02,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:02,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:110, output treesize:7 [2021-06-05 15:42:02,614 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:02,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048120439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:02,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:02,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 15:42:02,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106646710] [2021-06-05 15:42:02,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:42:02,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:02,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:42:02,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:42:02,615 INFO L87 Difference]: Start difference. First operand 260 states and 485 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:03,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:03,406 INFO L93 Difference]: Finished difference Result 858 states and 1666 transitions. [2021-06-05 15:42:03,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:42:03,406 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:42:03,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:03,407 INFO L225 Difference]: With dead ends: 858 [2021-06-05 15:42:03,407 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 15:42:03,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 731.4ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:42:03,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 15:42:03,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 333. [2021-06-05 15:42:03,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.9216867469879517) internal successors, (638), 332 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:03,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 638 transitions. [2021-06-05 15:42:03,417 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 638 transitions. Word has length 31 [2021-06-05 15:42:03,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:03,417 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 638 transitions. [2021-06-05 15:42:03,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:03,417 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 638 transitions. [2021-06-05 15:42:03,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:42:03,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:03,418 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:03,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 15:42:03,621 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:03,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:03,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1773283547, now seen corresponding path program 28 times [2021-06-05 15:42:03,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:03,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398799688] [2021-06-05 15:42:03,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:03,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:03,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398799688] [2021-06-05 15:42:03,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398799688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:03,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255945417] [2021-06-05 15:42:03,785 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 15:42:03,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:42:03,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:03,818 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:42:03,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:04,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:04,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:04,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:04,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:04,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:04,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:04,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:04,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:04,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:04,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:04,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:04,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 15:42:04,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:04,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:04,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:04,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 15:42:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:04,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255945417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:04,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:04,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2021-06-05 15:42:04,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768744743] [2021-06-05 15:42:04,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:42:04,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:04,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:42:04,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:42:04,030 INFO L87 Difference]: Start difference. First operand 333 states and 638 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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 15:42:04,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:04,358 INFO L93 Difference]: Finished difference Result 821 states and 1585 transitions. [2021-06-05 15:42:04,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:42:04,359 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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 31 [2021-06-05 15:42:04,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:04,360 INFO L225 Difference]: With dead ends: 821 [2021-06-05 15:42:04,360 INFO L226 Difference]: Without dead ends: 610 [2021-06-05 15:42:04,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 440.5ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:42:04,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-05 15:42:04,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 402. [2021-06-05 15:42:04,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.887780548628429) internal successors, (757), 401 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:04,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 757 transitions. [2021-06-05 15:42:04,366 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 757 transitions. Word has length 31 [2021-06-05 15:42:04,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:04,366 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 757 transitions. [2021-06-05 15:42:04,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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 15:42:04,366 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 757 transitions. [2021-06-05 15:42:04,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:42:04,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:04,367 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:04,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:04,581 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:04,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:04,581 INFO L82 PathProgramCache]: Analyzing trace with hash -607493045, now seen corresponding path program 29 times [2021-06-05 15:42:04,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:04,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951580708] [2021-06-05 15:42:04,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:04,723 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:04,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:04,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951580708] [2021-06-05 15:42:04,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951580708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:04,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073689625] [2021-06-05 15:42:04,724 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 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 15:42:04,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:42:04,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:04,748 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:42:04,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:04,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:04,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:04,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:04,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:04,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:04,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:04,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:04,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:04,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:04,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:04,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:04,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:04,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 15:42:04,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:04,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:04,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:04,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 15:42:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:04,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073689625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:04,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:04,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2021-06-05 15:42:04,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094565500] [2021-06-05 15:42:04,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:42:04,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:04,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:42:04,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:42:04,980 INFO L87 Difference]: Start difference. First operand 402 states and 757 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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 15:42:05,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:05,184 INFO L93 Difference]: Finished difference Result 762 states and 1488 transitions. [2021-06-05 15:42:05,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:42:05,185 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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 31 [2021-06-05 15:42:05,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:05,186 INFO L225 Difference]: With dead ends: 762 [2021-06-05 15:42:05,186 INFO L226 Difference]: Without dead ends: 717 [2021-06-05 15:42:05,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 260.0ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:42:05,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-06-05 15:42:05,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 393. [2021-06-05 15:42:05,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.885204081632653) internal successors, (739), 392 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:05,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 739 transitions. [2021-06-05 15:42:05,192 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 739 transitions. Word has length 31 [2021-06-05 15:42:05,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:05,192 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 739 transitions. [2021-06-05 15:42:05,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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 15:42:05,192 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 739 transitions. [2021-06-05 15:42:05,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:42:05,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:05,193 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:05,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 15:42:05,405 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:05,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:05,406 INFO L82 PathProgramCache]: Analyzing trace with hash -105859509, now seen corresponding path program 30 times [2021-06-05 15:42:05,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:05,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381873545] [2021-06-05 15:42:05,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:05,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:05,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:05,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381873545] [2021-06-05 15:42:05,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381873545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:05,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749270794] [2021-06-05 15:42:05,577 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 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 15:42:05,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:42:05,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:05,613 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:42:05,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:05,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:05,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:05,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:05,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:05,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:05,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:05,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:05,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:05,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:05,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:05,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:05,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:05,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 15:42:05,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:05,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:05,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:05,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 15:42:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:05,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749270794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:05,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:05,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 15:42:05,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275339277] [2021-06-05 15:42:05,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:42:05,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:05,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:42:05,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:42:05,846 INFO L87 Difference]: Start difference. First operand 393 states and 739 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) 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 15:42:06,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:06,058 INFO L93 Difference]: Finished difference Result 745 states and 1468 transitions. [2021-06-05 15:42:06,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:42:06,058 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) 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 31 [2021-06-05 15:42:06,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:06,060 INFO L225 Difference]: With dead ends: 745 [2021-06-05 15:42:06,060 INFO L226 Difference]: Without dead ends: 700 [2021-06-05 15:42:06,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 297.8ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:42:06,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-06-05 15:42:06,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 414. [2021-06-05 15:42:06,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.8934624697336562) internal successors, (782), 413 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:06,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 782 transitions. [2021-06-05 15:42:06,066 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 782 transitions. Word has length 31 [2021-06-05 15:42:06,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:06,066 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 782 transitions. [2021-06-05 15:42:06,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) 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 15:42:06,066 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 782 transitions. [2021-06-05 15:42:06,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:42:06,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:06,066 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:06,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 15:42:06,269 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:06,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:06,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1268614363, now seen corresponding path program 31 times [2021-06-05 15:42:06,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:06,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66870420] [2021-06-05 15:42:06,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:06,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:06,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66870420] [2021-06-05 15:42:06,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66870420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:06,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712628868] [2021-06-05 15:42:06,426 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 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 15:42:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:06,457 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:42:06,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:06,615 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-05 15:42:06,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 15:42:06,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:06,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:06,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:06,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:7 [2021-06-05 15:42:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:06,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712628868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:06,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:06,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-06-05 15:42:06,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733284092] [2021-06-05 15:42:06,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:42:06,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:06,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:42:06,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:42:06,629 INFO L87 Difference]: Start difference. First operand 414 states and 782 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 15:42:06,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:06,786 INFO L93 Difference]: Finished difference Result 609 states and 1180 transitions. [2021-06-05 15:42:06,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:42:06,787 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 31 [2021-06-05 15:42:06,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:06,788 INFO L225 Difference]: With dead ends: 609 [2021-06-05 15:42:06,788 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 15:42:06,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:42:06,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 15:42:06,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 421. [2021-06-05 15:42:06,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.8976190476190475) internal successors, (797), 420 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:06,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 797 transitions. [2021-06-05 15:42:06,793 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 797 transitions. Word has length 31 [2021-06-05 15:42:06,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:06,793 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 797 transitions. [2021-06-05 15:42:06,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 15:42:06,794 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 797 transitions. [2021-06-05 15:42:06,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:42:06,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:06,794 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:07,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 15:42:07,009 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:07,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:07,009 INFO L82 PathProgramCache]: Analyzing trace with hash -416618662, now seen corresponding path program 32 times [2021-06-05 15:42:07,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:07,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010937053] [2021-06-05 15:42:07,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:07,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:07,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010937053] [2021-06-05 15:42:07,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010937053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:07,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230311801] [2021-06-05 15:42:07,065 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 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 15:42:07,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:42:07,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:07,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 15:42:07,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:07,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230311801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:07,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:07,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 15:42:07,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234644159] [2021-06-05 15:42:07,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:42:07,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:07,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:42:07,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:42:07,149 INFO L87 Difference]: Start difference. First operand 421 states and 797 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 15:42:07,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:07,170 INFO L93 Difference]: Finished difference Result 646 states and 1247 transitions. [2021-06-05 15:42:07,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:42:07,170 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 32 [2021-06-05 15:42:07,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:07,172 INFO L225 Difference]: With dead ends: 646 [2021-06-05 15:42:07,172 INFO L226 Difference]: Without dead ends: 640 [2021-06-05 15:42:07,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:42:07,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-05 15:42:07,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 540. [2021-06-05 15:42:07,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.0037105751391464) internal successors, (1080), 539 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:07,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1080 transitions. [2021-06-05 15:42:07,194 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1080 transitions. Word has length 32 [2021-06-05 15:42:07,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:07,195 INFO L482 AbstractCegarLoop]: Abstraction has 540 states and 1080 transitions. [2021-06-05 15:42:07,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 15:42:07,200 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1080 transitions. [2021-06-05 15:42:07,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:42:07,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:07,201 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:07,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 15:42:07,409 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:07,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:07,409 INFO L82 PathProgramCache]: Analyzing trace with hash 502506762, now seen corresponding path program 33 times [2021-06-05 15:42:07,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:07,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474328923] [2021-06-05 15:42:07,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:07,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:07,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474328923] [2021-06-05 15:42:07,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474328923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:07,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399702306] [2021-06-05 15:42:07,442 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 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 15:42:07,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:42:07,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:07,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 15:42:07,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:07,525 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:07,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399702306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:07,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:07,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 15:42:07,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522254517] [2021-06-05 15:42:07,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:42:07,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:07,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:42:07,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:42:07,526 INFO L87 Difference]: Start difference. First operand 540 states and 1080 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 15:42:07,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:07,550 INFO L93 Difference]: Finished difference Result 817 states and 1634 transitions. [2021-06-05 15:42:07,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:42:07,551 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 32 [2021-06-05 15:42:07,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:07,552 INFO L225 Difference]: With dead ends: 817 [2021-06-05 15:42:07,553 INFO L226 Difference]: Without dead ends: 811 [2021-06-05 15:42:07,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:42:07,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-06-05 15:42:07,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 585. [2021-06-05 15:42:07,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.0256849315068495) internal successors, (1183), 584 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:07,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1183 transitions. [2021-06-05 15:42:07,560 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1183 transitions. Word has length 32 [2021-06-05 15:42:07,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:07,560 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1183 transitions. [2021-06-05 15:42:07,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 15:42:07,560 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1183 transitions. [2021-06-05 15:42:07,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:42:07,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:07,561 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:07,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 15:42:07,777 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:07,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:07,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1113334029, now seen corresponding path program 34 times [2021-06-05 15:42:07,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:07,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418573999] [2021-06-05 15:42:07,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:07,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:07,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418573999] [2021-06-05 15:42:07,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418573999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:07,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710226749] [2021-06-05 15:42:07,962 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 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 15:42:07,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:42:07,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:07,992 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:42:07,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:08,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:08,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:08,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:08,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:08,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:08,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:08,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 15:42:08,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:08,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:08,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:08,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 15:42:08,367 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:08,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710226749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:08,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:08,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-06-05 15:42:08,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045754534] [2021-06-05 15:42:08,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:42:08,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:08,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:42:08,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:42:08,368 INFO L87 Difference]: Start difference. First operand 585 states and 1183 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:08,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:08,648 INFO L93 Difference]: Finished difference Result 1500 states and 3118 transitions. [2021-06-05 15:42:08,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:42:08,648 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:42:08,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:08,651 INFO L225 Difference]: With dead ends: 1500 [2021-06-05 15:42:08,651 INFO L226 Difference]: Without dead ends: 1408 [2021-06-05 15:42:08,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 425.1ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:42:08,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-06-05 15:42:08,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 627. [2021-06-05 15:42:08,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 2.0143769968051117) internal successors, (1261), 626 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:08,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1261 transitions. [2021-06-05 15:42:08,660 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1261 transitions. Word has length 35 [2021-06-05 15:42:08,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:08,660 INFO L482 AbstractCegarLoop]: Abstraction has 627 states and 1261 transitions. [2021-06-05 15:42:08,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:08,660 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1261 transitions. [2021-06-05 15:42:08,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:42:08,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:08,661 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:08,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 15:42:08,867 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:08,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:08,867 INFO L82 PathProgramCache]: Analyzing trace with hash 382694851, now seen corresponding path program 35 times [2021-06-05 15:42:08,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:08,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108014769] [2021-06-05 15:42:08,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:09,077 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:09,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:09,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108014769] [2021-06-05 15:42:09,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108014769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:09,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861001466] [2021-06-05 15:42:09,078 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 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 15:42:09,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:42:09,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:09,106 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:42:09,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:09,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:09,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:09,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:09,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:09,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:09,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:09,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 15:42:09,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:09,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:09,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:09,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 15:42:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:09,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861001466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:09,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:09,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 15:42:09,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571266390] [2021-06-05 15:42:09,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:42:09,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:09,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:42:09,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:42:09,493 INFO L87 Difference]: Start difference. First operand 627 states and 1261 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:09,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:09,801 INFO L93 Difference]: Finished difference Result 1498 states and 3132 transitions. [2021-06-05 15:42:09,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:42:09,805 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:42:09,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:09,808 INFO L225 Difference]: With dead ends: 1498 [2021-06-05 15:42:09,808 INFO L226 Difference]: Without dead ends: 1403 [2021-06-05 15:42:09,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 457.1ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:42:09,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-06-05 15:42:09,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 543. [2021-06-05 15:42:09,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.0387453874538743) internal successors, (1105), 542 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:09,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1105 transitions. [2021-06-05 15:42:09,816 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1105 transitions. Word has length 35 [2021-06-05 15:42:09,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:09,816 INFO L482 AbstractCegarLoop]: Abstraction has 543 states and 1105 transitions. [2021-06-05 15:42:09,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:09,816 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1105 transitions. [2021-06-05 15:42:09,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:42:09,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:09,817 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:10,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 15:42:10,033 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:10,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:10,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1079804723, now seen corresponding path program 36 times [2021-06-05 15:42:10,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:10,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54403809] [2021-06-05 15:42:10,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:10,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:10,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54403809] [2021-06-05 15:42:10,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54403809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:10,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237001219] [2021-06-05 15:42:10,200 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 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 15:42:10,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:42:10,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:10,237 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:42:10,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:10,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:10,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:10,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:10,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:10,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:10,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:10,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 15:42:10,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:10,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:10,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:10,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 15:42:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:10,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237001219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:10,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:10,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-06-05 15:42:10,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847215204] [2021-06-05 15:42:10,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:42:10,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:10,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:42:10,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:42:10,630 INFO L87 Difference]: Start difference. First operand 543 states and 1105 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:10,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:10,799 INFO L93 Difference]: Finished difference Result 1268 states and 2646 transitions. [2021-06-05 15:42:10,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:42:10,800 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:42:10,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:10,802 INFO L225 Difference]: With dead ends: 1268 [2021-06-05 15:42:10,802 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 15:42:10,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 425.5ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:42:10,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 15:42:10,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 573. [2021-06-05 15:42:10,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.0244755244755246) internal successors, (1158), 572 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:10,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1158 transitions. [2021-06-05 15:42:10,809 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1158 transitions. Word has length 35 [2021-06-05 15:42:10,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:10,810 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1158 transitions. [2021-06-05 15:42:10,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:10,810 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1158 transitions. [2021-06-05 15:42:10,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:42:10,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:10,810 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:11,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:11,014 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:11,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:11,014 INFO L82 PathProgramCache]: Analyzing trace with hash -884384461, now seen corresponding path program 37 times [2021-06-05 15:42:11,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:11,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863680104] [2021-06-05 15:42:11,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:11,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:11,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:11,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863680104] [2021-06-05 15:42:11,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863680104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:11,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641470775] [2021-06-05 15:42:11,222 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 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 15:42:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:11,247 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:42:11,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:11,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:11,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:11,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:11,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:11,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:11,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:11,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 15:42:11,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:11,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:11,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:11,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 15:42:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:11,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641470775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:11,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:11,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 15:42:11,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580850251] [2021-06-05 15:42:11,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:42:11,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:11,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:42:11,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:42:11,646 INFO L87 Difference]: Start difference. First operand 573 states and 1158 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:11,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:11,954 INFO L93 Difference]: Finished difference Result 1258 states and 2602 transitions. [2021-06-05 15:42:11,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:42:11,954 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:42:11,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:11,957 INFO L225 Difference]: With dead ends: 1258 [2021-06-05 15:42:11,957 INFO L226 Difference]: Without dead ends: 1204 [2021-06-05 15:42:11,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 465.0ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:42:11,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-06-05 15:42:11,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 567. [2021-06-05 15:42:11,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 2.0247349823321557) internal successors, (1146), 566 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1146 transitions. [2021-06-05 15:42:11,968 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1146 transitions. Word has length 35 [2021-06-05 15:42:11,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:11,968 INFO L482 AbstractCegarLoop]: Abstraction has 567 states and 1146 transitions. [2021-06-05 15:42:11,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:11,968 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1146 transitions. [2021-06-05 15:42:11,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:42:11,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:11,969 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:12,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:12,184 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:12,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:12,184 INFO L82 PathProgramCache]: Analyzing trace with hash -144551933, now seen corresponding path program 38 times [2021-06-05 15:42:12,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:12,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128199162] [2021-06-05 15:42:12,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:12,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:12,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128199162] [2021-06-05 15:42:12,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128199162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:12,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127169105] [2021-06-05 15:42:12,381 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 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 15:42:12,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:42:12,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:12,416 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:42:12,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:12,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:12,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:12,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:12,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:12,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:12,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:12,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 15:42:12,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:12,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:12,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:12,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 15:42:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:12,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127169105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:12,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:12,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 15:42:12,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858503121] [2021-06-05 15:42:12,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:42:12,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:12,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:42:12,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:42:12,818 INFO L87 Difference]: Start difference. First operand 567 states and 1146 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:13,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:13,088 INFO L93 Difference]: Finished difference Result 934 states and 1907 transitions. [2021-06-05 15:42:13,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:42:13,088 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:42:13,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:13,090 INFO L225 Difference]: With dead ends: 934 [2021-06-05 15:42:13,090 INFO L226 Difference]: Without dead ends: 913 [2021-06-05 15:42:13,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 439.5ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:42:13,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-06-05 15:42:13,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 573. [2021-06-05 15:42:13,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.0244755244755246) internal successors, (1158), 572 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:13,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1158 transitions. [2021-06-05 15:42:13,097 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1158 transitions. Word has length 35 [2021-06-05 15:42:13,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:13,097 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1158 transitions. [2021-06-05 15:42:13,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:13,097 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1158 transitions. [2021-06-05 15:42:13,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:42:13,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:13,098 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:13,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:13,312 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:13,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:13,312 INFO L82 PathProgramCache]: Analyzing trace with hash 894968627, now seen corresponding path program 39 times [2021-06-05 15:42:13,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:13,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669289338] [2021-06-05 15:42:13,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:13,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:13,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669289338] [2021-06-05 15:42:13,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669289338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:13,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270889267] [2021-06-05 15:42:13,489 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 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 15:42:13,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:42:13,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:13,516 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:42:13,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:14,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:14,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:14,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:14,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:14,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:14,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:14,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:14,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:14,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:14,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:14,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:14,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:14,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:14,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:14,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:14,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:14,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:14,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:14,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:14,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:14,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:14,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:14,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:14,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:14,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:14,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:14,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 43 [2021-06-05 15:42:14,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:14,615 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-06-05 15:42:14,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:14,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:124, output treesize:7 [2021-06-05 15:42:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:14,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270889267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:14,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:14,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 15:42:14,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370549872] [2021-06-05 15:42:14,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:42:14,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:14,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:42:14,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:42:14,626 INFO L87 Difference]: Start difference. First operand 573 states and 1158 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:21,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:21,773 INFO L93 Difference]: Finished difference Result 1198 states and 2387 transitions. [2021-06-05 15:42:21,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:42:21,773 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:42:21,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:21,774 INFO L225 Difference]: With dead ends: 1198 [2021-06-05 15:42:21,774 INFO L226 Difference]: Without dead ends: 976 [2021-06-05 15:42:21,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 3897.5ms TimeCoverageRelationStatistics Valid=112, Invalid=757, Unknown=1, NotChecked=0, Total=870 [2021-06-05 15:42:21,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-06-05 15:42:21,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 673. [2021-06-05 15:42:21,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 1.9970238095238095) internal successors, (1342), 672 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:21,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1342 transitions. [2021-06-05 15:42:21,782 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1342 transitions. Word has length 35 [2021-06-05 15:42:21,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:21,782 INFO L482 AbstractCegarLoop]: Abstraction has 673 states and 1342 transitions. [2021-06-05 15:42:21,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:21,782 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1342 transitions. [2021-06-05 15:42:21,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:42:21,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:21,783 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:21,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 15:42:21,999 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:21,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:21,999 INFO L82 PathProgramCache]: Analyzing trace with hash 855473251, now seen corresponding path program 40 times [2021-06-05 15:42:21,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:21,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072229244] [2021-06-05 15:42:21,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:22,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:22,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:22,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072229244] [2021-06-05 15:42:22,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072229244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:22,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825590524] [2021-06-05 15:42:22,224 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 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 15:42:22,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:42:22,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:22,255 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:42:22,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:22,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:22,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:22,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:22,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:22,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:22,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 15:42:22,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:22,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:22,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:22,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 15:42:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:22,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825590524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:22,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:22,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 15:42:22,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849086715] [2021-06-05 15:42:22,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:42:22,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:22,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:42:22,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:42:22,652 INFO L87 Difference]: Start difference. First operand 673 states and 1342 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:22,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:22,889 INFO L93 Difference]: Finished difference Result 1761 states and 3634 transitions. [2021-06-05 15:42:22,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:42:22,889 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:42:22,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:22,891 INFO L225 Difference]: With dead ends: 1761 [2021-06-05 15:42:22,891 INFO L226 Difference]: Without dead ends: 1632 [2021-06-05 15:42:22,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 484.7ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:42:22,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-06-05 15:42:22,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 763. [2021-06-05 15:42:22,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 1.9855643044619422) internal successors, (1513), 762 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:22,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1513 transitions. [2021-06-05 15:42:22,904 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1513 transitions. Word has length 35 [2021-06-05 15:42:22,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:22,905 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 1513 transitions. [2021-06-05 15:42:22,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:22,905 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1513 transitions. [2021-06-05 15:42:22,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:42:22,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:22,906 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:23,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:23,117 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:23,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:23,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1595305779, now seen corresponding path program 41 times [2021-06-05 15:42:23,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:23,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586468118] [2021-06-05 15:42:23,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:23,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:23,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586468118] [2021-06-05 15:42:23,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586468118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:23,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786563887] [2021-06-05 15:42:23,335 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 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 15:42:23,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:42:23,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:23,366 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:42:23,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:23,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:23,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:23,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:23,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:23,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:23,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:23,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:23,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 34 [2021-06-05 15:42:23,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:23,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:23,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:23,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:86, output treesize:3 [2021-06-05 15:42:23,848 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:23,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786563887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:23,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:23,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 15:42:23,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374590267] [2021-06-05 15:42:23,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:42:23,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:23,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:42:23,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:42:23,849 INFO L87 Difference]: Start difference. First operand 763 states and 1513 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:24,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:24,845 INFO L93 Difference]: Finished difference Result 1434 states and 2903 transitions. [2021-06-05 15:42:24,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:42:24,845 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:42:24,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:24,847 INFO L225 Difference]: With dead ends: 1434 [2021-06-05 15:42:24,847 INFO L226 Difference]: Without dead ends: 1212 [2021-06-05 15:42:24,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1044.6ms TimeCoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:42:24,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-06-05 15:42:24,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 799. [2021-06-05 15:42:24,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 1.9862155388471179) internal successors, (1585), 798 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:24,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1585 transitions. [2021-06-05 15:42:24,856 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1585 transitions. Word has length 35 [2021-06-05 15:42:24,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:24,856 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 1585 transitions. [2021-06-05 15:42:24,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:24,856 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1585 transitions. [2021-06-05 15:42:24,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:42:24,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:24,857 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:25,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:25,063 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:25,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:25,063 INFO L82 PathProgramCache]: Analyzing trace with hash 41830851, now seen corresponding path program 42 times [2021-06-05 15:42:25,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:25,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968847160] [2021-06-05 15:42:25,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:25,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:25,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968847160] [2021-06-05 15:42:25,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968847160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:25,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100690925] [2021-06-05 15:42:25,282 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 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 15:42:25,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:42:25,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:25,308 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:42:25,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:25,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:25,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:25,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:25,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:25,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:25,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:25,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:25,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:25,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:25,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:25,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:25,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:25,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:25,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:25,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:25,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:25,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:25,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:25,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:25,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:25,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:25,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:25,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:25,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:25,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 15:42:25,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:25,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:25,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:25,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 15:42:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:25,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100690925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:25,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:25,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 15:42:25,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002746301] [2021-06-05 15:42:25,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:42:25,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:25,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:42:25,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:42:25,664 INFO L87 Difference]: Start difference. First operand 799 states and 1585 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:25,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:25,960 INFO L93 Difference]: Finished difference Result 1504 states and 3031 transitions. [2021-06-05 15:42:25,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:42:25,960 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:42:25,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:25,962 INFO L225 Difference]: With dead ends: 1504 [2021-06-05 15:42:25,962 INFO L226 Difference]: Without dead ends: 1463 [2021-06-05 15:42:25,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 438.5ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:42:25,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-06-05 15:42:25,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 826. [2021-06-05 15:42:25,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 1.9903030303030302) internal successors, (1642), 825 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:25,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1642 transitions. [2021-06-05 15:42:25,972 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1642 transitions. Word has length 35 [2021-06-05 15:42:25,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:25,972 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 1642 transitions. [2021-06-05 15:42:25,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:25,972 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1642 transitions. [2021-06-05 15:42:25,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:42:25,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:25,973 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:26,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 15:42:26,189 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:26,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:26,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1721364211, now seen corresponding path program 43 times [2021-06-05 15:42:26,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:26,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853415940] [2021-06-05 15:42:26,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:26,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:26,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853415940] [2021-06-05 15:42:26,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853415940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:26,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628638761] [2021-06-05 15:42:26,423 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 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 15:42:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:26,448 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:42:26,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:26,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:26,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:26,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:26,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:26,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:26,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:26,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:26,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:26,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:26,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:26,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:26,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:26,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:26,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:26,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:26,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:26,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:26,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:26,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:26,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:26,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:26,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:26,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:26,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 15:42:26,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:26,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:26,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:26,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 15:42:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:26,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628638761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:26,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:26,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 15:42:26,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961498088] [2021-06-05 15:42:26,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:42:26,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:26,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:42:26,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:42:26,789 INFO L87 Difference]: Start difference. First operand 826 states and 1642 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:27,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:27,237 INFO L93 Difference]: Finished difference Result 1685 states and 3364 transitions. [2021-06-05 15:42:27,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:42:27,237 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:42:27,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:27,239 INFO L225 Difference]: With dead ends: 1685 [2021-06-05 15:42:27,239 INFO L226 Difference]: Without dead ends: 1455 [2021-06-05 15:42:27,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 617.7ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:42:27,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-06-05 15:42:27,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 996. [2021-06-05 15:42:27,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 1.977889447236181) internal successors, (1968), 995 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:27,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1968 transitions. [2021-06-05 15:42:27,251 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1968 transitions. Word has length 35 [2021-06-05 15:42:27,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:27,251 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 1968 transitions. [2021-06-05 15:42:27,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:27,251 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1968 transitions. [2021-06-05 15:42:27,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:42:27,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:27,253 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:27,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 15:42:27,469 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:27,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:27,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1665521843, now seen corresponding path program 44 times [2021-06-05 15:42:27,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:27,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201456601] [2021-06-05 15:42:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:42:27,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:27,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201456601] [2021-06-05 15:42:27,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201456601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:27,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982985669] [2021-06-05 15:42:27,615 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 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 15:42:27,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:42:27,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:27,641 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:42:27,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:27,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:27,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:27,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:27,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:27,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:27,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:27,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:27,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:27,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:27,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:27,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:27,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:27,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:27,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:27,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:27,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:27,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:27,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:27,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:27,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:27,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:27,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:27,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:27,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:27,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 15:42:27,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:27,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:27,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:27,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 15:42:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:27,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982985669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:27,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:27,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 19 [2021-06-05 15:42:27,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955182974] [2021-06-05 15:42:27,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:42:27,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:27,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:42:27,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:42:27,977 INFO L87 Difference]: Start difference. First operand 996 states and 1968 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:28,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:28,392 INFO L93 Difference]: Finished difference Result 1889 states and 3808 transitions. [2021-06-05 15:42:28,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:42:28,393 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:42:28,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:28,394 INFO L225 Difference]: With dead ends: 1889 [2021-06-05 15:42:28,395 INFO L226 Difference]: Without dead ends: 1691 [2021-06-05 15:42:28,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 591.4ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:42:28,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2021-06-05 15:42:28,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1029. [2021-06-05 15:42:28,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 1.9815175097276265) internal successors, (2037), 1028 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:28,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 2037 transitions. [2021-06-05 15:42:28,407 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 2037 transitions. Word has length 35 [2021-06-05 15:42:28,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:28,407 INFO L482 AbstractCegarLoop]: Abstraction has 1029 states and 2037 transitions. [2021-06-05 15:42:28,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:28,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 2037 transitions. [2021-06-05 15:42:28,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:42:28,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:28,408 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:28,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 15:42:28,620 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:28,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:28,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1526251277, now seen corresponding path program 45 times [2021-06-05 15:42:28,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:28,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214371097] [2021-06-05 15:42:28,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:28,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:28,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:28,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214371097] [2021-06-05 15:42:28,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214371097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:28,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258086865] [2021-06-05 15:42:28,816 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 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 15:42:28,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:42:28,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:28,870 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:42:28,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:29,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:29,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:29,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:29,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:29,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:29,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:29,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:29,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:29,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:29,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:29,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:29,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:29,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:29,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:29,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:29,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:29,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:29,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:29,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:29,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:29,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:29,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:29,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:29,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:29,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:29,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:29,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:29,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 43 [2021-06-05 15:42:29,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:29,310 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 15:42:29,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:29,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:127, output treesize:7 [2021-06-05 15:42:29,319 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:29,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258086865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:29,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:29,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 15:42:29,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741264024] [2021-06-05 15:42:29,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:42:29,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:29,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:42:29,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:42:29,320 INFO L87 Difference]: Start difference. First operand 1029 states and 2037 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:30,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:30,146 INFO L93 Difference]: Finished difference Result 2019 states and 3995 transitions. [2021-06-05 15:42:30,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:42:30,146 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:42:30,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:30,149 INFO L225 Difference]: With dead ends: 2019 [2021-06-05 15:42:30,149 INFO L226 Difference]: Without dead ends: 1805 [2021-06-05 15:42:30,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 919.4ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:42:30,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2021-06-05 15:42:30,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1140. [2021-06-05 15:42:30,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.9675153643546972) internal successors, (2241), 1139 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:30,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 2241 transitions. [2021-06-05 15:42:30,161 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 2241 transitions. Word has length 35 [2021-06-05 15:42:30,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:30,161 INFO L482 AbstractCegarLoop]: Abstraction has 1140 states and 2241 transitions. [2021-06-05 15:42:30,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:30,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 2241 transitions. [2021-06-05 15:42:30,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:42:30,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:30,162 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:30,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:30,362 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:30,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:30,363 INFO L82 PathProgramCache]: Analyzing trace with hash -825914125, now seen corresponding path program 46 times [2021-06-05 15:42:30,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:30,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812669002] [2021-06-05 15:42:30,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:30,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:30,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812669002] [2021-06-05 15:42:30,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812669002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:30,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814108703] [2021-06-05 15:42:30,566 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 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 15:42:30,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:42:30,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:30,590 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:42:30,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:30,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:30,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:30,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:30,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:30,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:30,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:30,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:30,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:30,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:30,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:30,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:30,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:30,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:30,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:30,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:30,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:30,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:30,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:30,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 15:42:30,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:30,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:30,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:30,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 15:42:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:30,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814108703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:30,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:30,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 15:42:30,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356384710] [2021-06-05 15:42:30,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:42:30,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:30,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:42:30,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:42:30,914 INFO L87 Difference]: Start difference. First operand 1140 states and 2241 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:31,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:31,208 INFO L93 Difference]: Finished difference Result 2038 states and 4167 transitions. [2021-06-05 15:42:31,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:42:31,208 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:42:31,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:31,210 INFO L225 Difference]: With dead ends: 2038 [2021-06-05 15:42:31,210 INFO L226 Difference]: Without dead ends: 1919 [2021-06-05 15:42:31,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 396.9ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:42:31,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2021-06-05 15:42:31,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1155. [2021-06-05 15:42:31,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 1.9679376083188909) internal successors, (2271), 1154 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 15:42:31,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 2271 transitions. [2021-06-05 15:42:31,224 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 2271 transitions. Word has length 35 [2021-06-05 15:42:31,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:31,224 INFO L482 AbstractCegarLoop]: Abstraction has 1155 states and 2271 transitions. [2021-06-05 15:42:31,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:31,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 2271 transitions. [2021-06-05 15:42:31,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:42:31,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:31,225 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:31,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:31,440 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:31,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:31,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2143963011, now seen corresponding path program 47 times [2021-06-05 15:42:31,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:31,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316393148] [2021-06-05 15:42:31,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:31,637 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:31,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:31,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316393148] [2021-06-05 15:42:31,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316393148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:31,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113460751] [2021-06-05 15:42:31,638 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 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 15:42:31,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:42:31,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:31,668 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:42:31,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:32,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:32,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:32,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:32,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:32,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:32,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:32,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:32,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 34 [2021-06-05 15:42:32,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:32,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:32,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:32,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:3 [2021-06-05 15:42:32,143 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:32,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113460751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:32,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:32,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-06-05 15:42:32,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799639528] [2021-06-05 15:42:32,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:42:32,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:32,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:42:32,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:42:32,144 INFO L87 Difference]: Start difference. First operand 1155 states and 2271 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:32,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:32,766 INFO L93 Difference]: Finished difference Result 1927 states and 3858 transitions. [2021-06-05 15:42:32,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:42:32,766 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:42:32,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:32,768 INFO L225 Difference]: With dead ends: 1927 [2021-06-05 15:42:32,768 INFO L226 Difference]: Without dead ends: 1781 [2021-06-05 15:42:32,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 743.3ms TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:42:32,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-06-05 15:42:32,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1224. [2021-06-05 15:42:32,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 1.9754701553556828) internal successors, (2416), 1223 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:32,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2416 transitions. [2021-06-05 15:42:32,782 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2416 transitions. Word has length 35 [2021-06-05 15:42:32,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:32,782 INFO L482 AbstractCegarLoop]: Abstraction has 1224 states and 2416 transitions. [2021-06-05 15:42:32,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:32,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2416 transitions. [2021-06-05 15:42:32,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:42:32,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:32,784 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:32,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 15:42:32,997 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:32,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:32,997 INFO L82 PathProgramCache]: Analyzing trace with hash -690344573, now seen corresponding path program 48 times [2021-06-05 15:42:32,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:32,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694734278] [2021-06-05 15:42:32,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:33,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:33,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694734278] [2021-06-05 15:42:33,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694734278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:33,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151045259] [2021-06-05 15:42:33,178 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 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 15:42:33,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:42:33,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:33,204 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:42:33,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:33,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:33,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:33,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:33,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:33,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:33,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:33,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:33,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:33,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:33,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:33,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:33,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:33,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:33,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:33,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:33,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:33,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:33,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 15:42:33,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:33,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:33,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:33,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 15:42:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:33,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151045259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:33,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:33,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 20 [2021-06-05 15:42:33,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181170190] [2021-06-05 15:42:33,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:42:33,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:33,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:42:33,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:42:33,559 INFO L87 Difference]: Start difference. First operand 1224 states and 2416 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:33,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:33,821 INFO L93 Difference]: Finished difference Result 2191 states and 4418 transitions. [2021-06-05 15:42:33,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:42:33,821 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:42:33,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:33,826 INFO L225 Difference]: With dead ends: 2191 [2021-06-05 15:42:33,826 INFO L226 Difference]: Without dead ends: 2131 [2021-06-05 15:42:33,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 397.2ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:42:33,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-06-05 15:42:33,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1191. [2021-06-05 15:42:33,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 1.9714285714285715) internal successors, (2346), 1190 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 2346 transitions. [2021-06-05 15:42:33,842 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 2346 transitions. Word has length 35 [2021-06-05 15:42:33,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:33,843 INFO L482 AbstractCegarLoop]: Abstraction has 1191 states and 2346 transitions. [2021-06-05 15:42:33,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:33,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 2346 transitions. [2021-06-05 15:42:33,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:42:33,844 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:33,844 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:34,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:34,057 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:34,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:34,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1450667133, now seen corresponding path program 49 times [2021-06-05 15:42:34,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:34,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610844704] [2021-06-05 15:42:34,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:34,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:34,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610844704] [2021-06-05 15:42:34,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610844704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:34,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510107560] [2021-06-05 15:42:34,263 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 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 15:42:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:34,286 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:42:34,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:34,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:34,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:34,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:34,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:34,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:34,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:34,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:34,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:34,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:34,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:34,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:34,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:34,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:34,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:34,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:34,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:34,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:34,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:34,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 15:42:34,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:34,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:34,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:34,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 15:42:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:34,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510107560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:34,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:34,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 15:42:34,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636721356] [2021-06-05 15:42:34,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:42:34,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:34,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:42:34,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:42:34,620 INFO L87 Difference]: Start difference. First operand 1191 states and 2346 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:34,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:34,823 INFO L93 Difference]: Finished difference Result 1992 states and 4014 transitions. [2021-06-05 15:42:34,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:42:34,823 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:42:34,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:34,825 INFO L225 Difference]: With dead ends: 1992 [2021-06-05 15:42:34,825 INFO L226 Difference]: Without dead ends: 1936 [2021-06-05 15:42:34,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 405.1ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:42:34,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-06-05 15:42:34,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1191. [2021-06-05 15:42:34,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 1.9714285714285715) internal successors, (2346), 1190 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:34,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 2346 transitions. [2021-06-05 15:42:34,838 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 2346 transitions. Word has length 35 [2021-06-05 15:42:34,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:34,838 INFO L482 AbstractCegarLoop]: Abstraction has 1191 states and 2346 transitions. [2021-06-05 15:42:34,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:34,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 2346 transitions. [2021-06-05 15:42:34,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:42:34,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:34,840 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:35,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 15:42:35,055 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:35,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:35,055 INFO L82 PathProgramCache]: Analyzing trace with hash 9304755, now seen corresponding path program 50 times [2021-06-05 15:42:35,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:35,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962768315] [2021-06-05 15:42:35,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:35,262 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:35,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:35,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962768315] [2021-06-05 15:42:35,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962768315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:35,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682169398] [2021-06-05 15:42:35,263 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 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 15:42:35,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:42:35,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:35,287 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:42:35,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:35,513 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-06-05 15:42:35,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 15:42:35,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:35,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:35,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:35,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:109, output treesize:7 [2021-06-05 15:42:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:35,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682169398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:35,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:35,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-06-05 15:42:35,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458366419] [2021-06-05 15:42:35,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:42:35,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:35,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:42:35,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:42:35,525 INFO L87 Difference]: Start difference. First operand 1191 states and 2346 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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 15:42:35,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:35,813 INFO L93 Difference]: Finished difference Result 1629 states and 3230 transitions. [2021-06-05 15:42:35,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:42:35,814 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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 35 [2021-06-05 15:42:35,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:35,815 INFO L225 Difference]: With dead ends: 1629 [2021-06-05 15:42:35,815 INFO L226 Difference]: Without dead ends: 1614 [2021-06-05 15:42:35,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 352.6ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:42:35,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-06-05 15:42:35,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1198. [2021-06-05 15:42:35,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 1.9724310776942355) internal successors, (2361), 1197 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:35,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 2361 transitions. [2021-06-05 15:42:35,826 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 2361 transitions. Word has length 35 [2021-06-05 15:42:35,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:35,826 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 2361 transitions. [2021-06-05 15:42:35,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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 15:42:35,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 2361 transitions. [2021-06-05 15:42:35,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:42:35,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:35,828 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:36,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 15:42:36,029 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:36,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:36,029 INFO L82 PathProgramCache]: Analyzing trace with hash 118614578, now seen corresponding path program 51 times [2021-06-05 15:42:36,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:36,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244979477] [2021-06-05 15:42:36,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:36,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:36,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244979477] [2021-06-05 15:42:36,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244979477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:36,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251842044] [2021-06-05 15:42:36,066 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 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 15:42:36,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:42:36,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:36,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:42:36,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:36,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251842044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:36,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:36,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 15:42:36,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545790622] [2021-06-05 15:42:36,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:42:36,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:36,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:42:36,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:42:36,153 INFO L87 Difference]: Start difference. First operand 1198 states and 2361 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:36,183 INFO L93 Difference]: Finished difference Result 1523 states and 3015 transitions. [2021-06-05 15:42:36,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:42:36,183 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:42:36,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:36,184 INFO L225 Difference]: With dead ends: 1523 [2021-06-05 15:42:36,184 INFO L226 Difference]: Without dead ends: 1516 [2021-06-05 15:42:36,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:42:36,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-06-05 15:42:36,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1247. [2021-06-05 15:42:36,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 1.9839486356340288) internal successors, (2472), 1246 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:36,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 2472 transitions. [2021-06-05 15:42:36,195 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 2472 transitions. Word has length 36 [2021-06-05 15:42:36,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:36,196 INFO L482 AbstractCegarLoop]: Abstraction has 1247 states and 2472 transitions. [2021-06-05 15:42:36,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:36,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 2472 transitions. [2021-06-05 15:42:36,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 15:42:36,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:36,197 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:36,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 15:42:36,412 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:36,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:36,413 INFO L82 PathProgramCache]: Analyzing trace with hash 211103962, now seen corresponding path program 52 times [2021-06-05 15:42:36,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:36,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838640250] [2021-06-05 15:42:36,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:36,585 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:36,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:36,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838640250] [2021-06-05 15:42:36,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838640250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:36,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473967639] [2021-06-05 15:42:36,585 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 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 15:42:36,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:42:36,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:36,640 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:42:36,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:36,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:36,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:36,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:36,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:36,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:36,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:36,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:36,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:36,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:36,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:36,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:36,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:36,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:36,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:36,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:36,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:36,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:36,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:36,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:36,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:36,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:36,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:36,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 15:42:36,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:36,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:36,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:36,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 15:42:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:36,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473967639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:36,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:36,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-06-05 15:42:36,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551975726] [2021-06-05 15:42:36,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:42:36,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:36,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:42:36,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:42:36,974 INFO L87 Difference]: Start difference. First operand 1247 states and 2472 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:37,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:37,732 INFO L93 Difference]: Finished difference Result 2817 states and 5721 transitions. [2021-06-05 15:42:37,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:42:37,732 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 15:42:37,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:37,734 INFO L225 Difference]: With dead ends: 2817 [2021-06-05 15:42:37,734 INFO L226 Difference]: Without dead ends: 2497 [2021-06-05 15:42:37,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 754.3ms TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:42:37,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-06-05 15:42:37,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1341. [2021-06-05 15:42:37,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 1.983582089552239) internal successors, (2658), 1340 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:37,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 2658 transitions. [2021-06-05 15:42:37,747 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 2658 transitions. Word has length 38 [2021-06-05 15:42:37,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:37,747 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 2658 transitions. [2021-06-05 15:42:37,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:37,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 2658 transitions. [2021-06-05 15:42:37,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:42:37,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:37,749 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:37,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 15:42:37,965 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:37,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:37,965 INFO L82 PathProgramCache]: Analyzing trace with hash -918345861, now seen corresponding path program 53 times [2021-06-05 15:42:37,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:37,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697452567] [2021-06-05 15:42:37,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:37,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:38,167 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:38,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:38,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697452567] [2021-06-05 15:42:38,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697452567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:38,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813792286] [2021-06-05 15:42:38,167 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 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 15:42:38,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 15:42:38,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:38,195 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 15:42:38,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:38,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:38,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:38,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:38,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:38,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:38,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:38,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:38,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:38,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 38 [2021-06-05 15:42:38,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:38,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:38,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:38,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:98, output treesize:3 [2021-06-05 15:42:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:38,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813792286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:38,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:38,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 15:42:38,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360377857] [2021-06-05 15:42:38,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:42:38,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:38,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:42:38,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=905, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:42:38,792 INFO L87 Difference]: Start difference. First operand 1341 states and 2658 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:40,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:40,427 INFO L93 Difference]: Finished difference Result 2819 states and 5680 transitions. [2021-06-05 15:42:40,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:42:40,428 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:42:40,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:40,430 INFO L225 Difference]: With dead ends: 2819 [2021-06-05 15:42:40,430 INFO L226 Difference]: Without dead ends: 2609 [2021-06-05 15:42:40,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1517.0ms TimeCoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:42:40,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2021-06-05 15:42:40,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 1437. [2021-06-05 15:42:40,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 1.9700557103064067) internal successors, (2829), 1436 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:40,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 2829 transitions. [2021-06-05 15:42:40,450 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 2829 transitions. Word has length 39 [2021-06-05 15:42:40,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:40,450 INFO L482 AbstractCegarLoop]: Abstraction has 1437 states and 2829 transitions. [2021-06-05 15:42:40,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:40,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 2829 transitions. [2021-06-05 15:42:40,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:42:40,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:40,452 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:40,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:40,652 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:40,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:40,652 INFO L82 PathProgramCache]: Analyzing trace with hash 456128011, now seen corresponding path program 54 times [2021-06-05 15:42:40,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:40,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660790222] [2021-06-05 15:42:40,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:40,884 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:40,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:40,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660790222] [2021-06-05 15:42:40,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660790222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:40,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934171359] [2021-06-05 15:42:40,884 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 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 15:42:40,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:42:40,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:40,912 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:42:40,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:41,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:41,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:41,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:41,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:41,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:41,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:41,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:41,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:42:41,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:41,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:41,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:41,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:42:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:41,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934171359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:41,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:41,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-06-05 15:42:41,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854389] [2021-06-05 15:42:41,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:42:41,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:41,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:42:41,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:42:41,398 INFO L87 Difference]: Start difference. First operand 1437 states and 2829 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:41,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:41,717 INFO L93 Difference]: Finished difference Result 2311 states and 4610 transitions. [2021-06-05 15:42:41,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:42:41,718 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:42:41,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:41,719 INFO L225 Difference]: With dead ends: 2311 [2021-06-05 15:42:41,719 INFO L226 Difference]: Without dead ends: 2290 [2021-06-05 15:42:41,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 553.9ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:42:41,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2021-06-05 15:42:41,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1458. [2021-06-05 15:42:41,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 1.969114619080302) internal successors, (2869), 1457 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:41,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 2869 transitions. [2021-06-05 15:42:41,733 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 2869 transitions. Word has length 39 [2021-06-05 15:42:41,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:41,733 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 2869 transitions. [2021-06-05 15:42:41,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:41,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 2869 transitions. [2021-06-05 15:42:41,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:42:41,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:41,735 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:41,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 15:42:41,935 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:41,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:41,936 INFO L82 PathProgramCache]: Analyzing trace with hash -338168453, now seen corresponding path program 55 times [2021-06-05 15:42:41,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:41,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098763825] [2021-06-05 15:42:41,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:42,125 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:42,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:42,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098763825] [2021-06-05 15:42:42,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098763825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:42,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95208850] [2021-06-05 15:42:42,125 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 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 15:42:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:42,151 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:42:42,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:42,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:42,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:42,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:42,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:42,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:42,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:42,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:42,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:42:42,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:42,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:42,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:42,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:42:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:42,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95208850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:42,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:42,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-06-05 15:42:42,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813869927] [2021-06-05 15:42:42,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:42:42,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:42,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:42:42,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:42:42,645 INFO L87 Difference]: Start difference. First operand 1458 states and 2869 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:43,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:43,120 INFO L93 Difference]: Finished difference Result 2400 states and 4757 transitions. [2021-06-05 15:42:43,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:42:43,120 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:42:43,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:43,121 INFO L225 Difference]: With dead ends: 2400 [2021-06-05 15:42:43,121 INFO L226 Difference]: Without dead ends: 2109 [2021-06-05 15:42:43,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 747.1ms TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:42:43,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2021-06-05 15:42:43,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 1497. [2021-06-05 15:42:43,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 1.9545454545454546) internal successors, (2924), 1496 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:43,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 2924 transitions. [2021-06-05 15:42:43,138 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 2924 transitions. Word has length 39 [2021-06-05 15:42:43,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:43,138 INFO L482 AbstractCegarLoop]: Abstraction has 1497 states and 2924 transitions. [2021-06-05 15:42:43,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:43,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 2924 transitions. [2021-06-05 15:42:43,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:42:43,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:43,140 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:43,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:43,353 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:43,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:43,353 INFO L82 PathProgramCache]: Analyzing trace with hash 2077655787, now seen corresponding path program 56 times [2021-06-05 15:42:43,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:43,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519669733] [2021-06-05 15:42:43,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:43,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:43,583 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:43,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:43,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519669733] [2021-06-05 15:42:43,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519669733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:43,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914223059] [2021-06-05 15:42:43,584 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 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 15:42:43,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:42:43,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:43,621 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:42:43,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:44,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:44,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:44,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:44,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:44,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:44,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:44,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:44,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:42:44,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:44,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:44,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:44,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:42:44,133 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:44,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914223059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:44,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:44,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-06-05 15:42:44,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666531918] [2021-06-05 15:42:44,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:42:44,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:44,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:42:44,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:42:44,134 INFO L87 Difference]: Start difference. First operand 1497 states and 2924 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:44,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:44,706 INFO L93 Difference]: Finished difference Result 3106 states and 6326 transitions. [2021-06-05 15:42:44,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:42:44,706 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:42:44,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:44,708 INFO L225 Difference]: With dead ends: 3106 [2021-06-05 15:42:44,708 INFO L226 Difference]: Without dead ends: 2973 [2021-06-05 15:42:44,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 595.9ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:42:44,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2021-06-05 15:42:44,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 1152. [2021-06-05 15:42:44,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 1.9791485664639443) internal successors, (2278), 1151 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:44,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2278 transitions. [2021-06-05 15:42:44,722 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2278 transitions. Word has length 39 [2021-06-05 15:42:44,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:44,723 INFO L482 AbstractCegarLoop]: Abstraction has 1152 states and 2278 transitions. [2021-06-05 15:42:44,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:44,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2278 transitions. [2021-06-05 15:42:44,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:42:44,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:44,724 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:44,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 15:42:44,937 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:44,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:44,937 INFO L82 PathProgramCache]: Analyzing trace with hash -842837637, now seen corresponding path program 57 times [2021-06-05 15:42:44,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:44,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543588245] [2021-06-05 15:42:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:44,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:45,146 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:45,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:45,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543588245] [2021-06-05 15:42:45,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543588245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:45,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955794257] [2021-06-05 15:42:45,147 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 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 15:42:45,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:42:45,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:45,174 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 15:42:45,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:45,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:45,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:45,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:45,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:45,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:45,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:45,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:45,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:42:45,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:45,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:45,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:45,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:42:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:45,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955794257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:45,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:45,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-06-05 15:42:45,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40095644] [2021-06-05 15:42:45,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:42:45,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:45,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:42:45,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:42:45,701 INFO L87 Difference]: Start difference. First operand 1152 states and 2278 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:46,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:46,209 INFO L93 Difference]: Finished difference Result 2674 states and 5413 transitions. [2021-06-05 15:42:46,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:42:46,209 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:42:46,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:46,211 INFO L225 Difference]: With dead ends: 2674 [2021-06-05 15:42:46,211 INFO L226 Difference]: Without dead ends: 2391 [2021-06-05 15:42:46,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 576.9ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:42:46,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-06-05 15:42:46,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1314. [2021-06-05 15:42:46,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 1.9695354150799695) internal successors, (2586), 1313 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:46,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 2586 transitions. [2021-06-05 15:42:46,225 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 2586 transitions. Word has length 39 [2021-06-05 15:42:46,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:46,225 INFO L482 AbstractCegarLoop]: Abstraction has 1314 states and 2586 transitions. [2021-06-05 15:42:46,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:46,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 2586 transitions. [2021-06-05 15:42:46,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:42:46,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:46,226 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:46,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:46,429 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:46,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:46,429 INFO L82 PathProgramCache]: Analyzing trace with hash -425263029, now seen corresponding path program 58 times [2021-06-05 15:42:46,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:46,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121679556] [2021-06-05 15:42:46,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:46,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:46,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121679556] [2021-06-05 15:42:46,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121679556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:46,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472633158] [2021-06-05 15:42:46,664 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 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 15:42:46,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:42:46,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:46,690 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:42:46,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:47,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:47,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:47,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:47,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:47,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:47,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:47,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:47,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:42:47,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:47,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:47,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:47,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:42:47,231 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:47,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472633158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:47,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:47,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-06-05 15:42:47,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627384517] [2021-06-05 15:42:47,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:42:47,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:47,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:42:47,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:42:47,232 INFO L87 Difference]: Start difference. First operand 1314 states and 2586 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:47,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:47,759 INFO L93 Difference]: Finished difference Result 2628 states and 5306 transitions. [2021-06-05 15:42:47,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:42:47,759 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:42:47,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:47,761 INFO L225 Difference]: With dead ends: 2628 [2021-06-05 15:42:47,761 INFO L226 Difference]: Without dead ends: 2562 [2021-06-05 15:42:47,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 618.6ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:42:47,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-06-05 15:42:47,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 1257. [2021-06-05 15:42:47,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 1.9729299363057324) internal successors, (2478), 1256 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:47,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 2478 transitions. [2021-06-05 15:42:47,776 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 2478 transitions. Word has length 39 [2021-06-05 15:42:47,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:47,776 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 2478 transitions. [2021-06-05 15:42:47,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:47,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 2478 transitions. [2021-06-05 15:42:47,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:42:47,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:47,777 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:47,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 15:42:47,985 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:47,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:47,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1562671547, now seen corresponding path program 59 times [2021-06-05 15:42:47,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:47,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456744846] [2021-06-05 15:42:47,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:47,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:48,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:48,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456744846] [2021-06-05 15:42:48,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456744846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:48,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733399207] [2021-06-05 15:42:48,241 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 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 15:42:48,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 15:42:48,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:48,271 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 15:42:48,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:48,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:48,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:48,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:48,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:48,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:48,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:48,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:48,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:42:48,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:48,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:48,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:48,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:42:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:48,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733399207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:48,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:48,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-06-05 15:42:48,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854063584] [2021-06-05 15:42:48,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:42:48,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:48,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:42:48,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:42:48,766 INFO L87 Difference]: Start difference. First operand 1257 states and 2478 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:49,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:49,192 INFO L93 Difference]: Finished difference Result 1841 states and 3650 transitions. [2021-06-05 15:42:49,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:42:49,192 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:42:49,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:49,194 INFO L225 Difference]: With dead ends: 1841 [2021-06-05 15:42:49,194 INFO L226 Difference]: Without dead ends: 1810 [2021-06-05 15:42:49,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 785.5ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:42:49,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2021-06-05 15:42:49,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1383. [2021-06-05 15:42:49,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 1.960202604920405) internal successors, (2709), 1382 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:49,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 2709 transitions. [2021-06-05 15:42:49,206 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 2709 transitions. Word has length 39 [2021-06-05 15:42:49,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:49,206 INFO L482 AbstractCegarLoop]: Abstraction has 1383 states and 2709 transitions. [2021-06-05 15:42:49,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:49,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 2709 transitions. [2021-06-05 15:42:49,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:42:49,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:49,207 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:49,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:49,413 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:49,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:49,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1491350523, now seen corresponding path program 60 times [2021-06-05 15:42:49,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:49,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758964342] [2021-06-05 15:42:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:42:49,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:49,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758964342] [2021-06-05 15:42:49,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758964342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:49,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054232121] [2021-06-05 15:42:49,579 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 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 15:42:49,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 15:42:49,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:49,607 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:42:49,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:50,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:50,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:50,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:50,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:50,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:50,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:50,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:50,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:42:50,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:50,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:50,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:50,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:42:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:50,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054232121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:50,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:50,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-06-05 15:42:50,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332489607] [2021-06-05 15:42:50,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:42:50,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:50,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:42:50,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:42:50,101 INFO L87 Difference]: Start difference. First operand 1383 states and 2709 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:50,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:50,779 INFO L93 Difference]: Finished difference Result 2027 states and 4033 transitions. [2021-06-05 15:42:50,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:42:50,779 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:42:50,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:50,781 INFO L225 Difference]: With dead ends: 2027 [2021-06-05 15:42:50,781 INFO L226 Difference]: Without dead ends: 1995 [2021-06-05 15:42:50,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 824.9ms TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:42:50,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2021-06-05 15:42:50,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1166. [2021-06-05 15:42:50,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1165 states have (on average 1.9630901287553648) internal successors, (2287), 1165 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:50,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 2287 transitions. [2021-06-05 15:42:50,791 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 2287 transitions. Word has length 39 [2021-06-05 15:42:50,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:50,791 INFO L482 AbstractCegarLoop]: Abstraction has 1166 states and 2287 transitions. [2021-06-05 15:42:50,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:50,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 2287 transitions. [2021-06-05 15:42:50,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:42:50,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:50,792 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:50,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 15:42:50,995 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:50,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:50,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1844161605, now seen corresponding path program 61 times [2021-06-05 15:42:50,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:50,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903971344] [2021-06-05 15:42:50,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:51,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:51,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903971344] [2021-06-05 15:42:51,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903971344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:51,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444393330] [2021-06-05 15:42:51,240 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 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 15:42:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:51,269 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:42:51,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:51,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:51,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:51,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:51,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:51,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:51,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:51,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:42:51,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:51,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:51,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:51,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:42:51,777 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:51,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444393330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:51,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:51,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-06-05 15:42:51,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299144958] [2021-06-05 15:42:51,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:42:51,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:51,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:42:51,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:42:51,778 INFO L87 Difference]: Start difference. First operand 1166 states and 2287 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:52,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:52,237 INFO L93 Difference]: Finished difference Result 1981 states and 3920 transitions. [2021-06-05 15:42:52,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:42:52,238 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:42:52,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:52,240 INFO L225 Difference]: With dead ends: 1981 [2021-06-05 15:42:52,240 INFO L226 Difference]: Without dead ends: 1696 [2021-06-05 15:42:52,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 808.2ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:42:52,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-06-05 15:42:52,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1224. [2021-06-05 15:42:52,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 1.9574816026165167) internal successors, (2394), 1223 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:52,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2394 transitions. [2021-06-05 15:42:52,250 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2394 transitions. Word has length 39 [2021-06-05 15:42:52,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:52,250 INFO L482 AbstractCegarLoop]: Abstraction has 1224 states and 2394 transitions. [2021-06-05 15:42:52,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:52,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2394 transitions. [2021-06-05 15:42:52,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:42:52,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:52,251 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:52,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:52,453 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:52,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:52,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1946136507, now seen corresponding path program 62 times [2021-06-05 15:42:52,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:52,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012731407] [2021-06-05 15:42:52,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:52,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:52,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012731407] [2021-06-05 15:42:52,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012731407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:52,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708819454] [2021-06-05 15:42:52,722 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 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 15:42:52,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:42:52,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:52,747 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:42:52,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:53,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:53,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:53,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:53,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:53,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:53,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:53,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:53,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:42:53,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:53,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:53,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:53,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:42:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:53,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708819454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:53,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:53,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-06-05 15:42:53,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804820306] [2021-06-05 15:42:53,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:42:53,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:53,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:42:53,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:42:53,262 INFO L87 Difference]: Start difference. First operand 1224 states and 2394 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:53,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:53,689 INFO L93 Difference]: Finished difference Result 2349 states and 4815 transitions. [2021-06-05 15:42:53,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:42:53,690 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:42:53,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:53,692 INFO L225 Difference]: With dead ends: 2349 [2021-06-05 15:42:53,692 INFO L226 Difference]: Without dead ends: 2230 [2021-06-05 15:42:53,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 621.4ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:42:53,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-06-05 15:42:53,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 1230. [2021-06-05 15:42:53,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 1.9576891781936534) internal successors, (2406), 1229 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:53,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 2406 transitions. [2021-06-05 15:42:53,703 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 2406 transitions. Word has length 39 [2021-06-05 15:42:53,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:53,703 INFO L482 AbstractCegarLoop]: Abstraction has 1230 states and 2406 transitions. [2021-06-05 15:42:53,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:53,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 2406 transitions. [2021-06-05 15:42:53,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:42:53,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:53,704 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:53,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 15:42:53,905 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:53,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:53,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1339514507, now seen corresponding path program 63 times [2021-06-05 15:42:53,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:53,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033789739] [2021-06-05 15:42:53,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:54,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:54,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033789739] [2021-06-05 15:42:54,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033789739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:54,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130559365] [2021-06-05 15:42:54,149 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 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 15:42:54,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 15:42:54,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:54,176 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:42:54,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:54,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:54,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:54,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:54,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:54,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:54,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:54,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:54,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:42:54,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:54,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:54,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:54,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:42:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:54,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130559365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:54,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:54,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-06-05 15:42:54,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978402942] [2021-06-05 15:42:54,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:42:54,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:54,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:42:54,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:42:54,778 INFO L87 Difference]: Start difference. First operand 1230 states and 2406 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:55,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:55,069 INFO L93 Difference]: Finished difference Result 2175 states and 4323 transitions. [2021-06-05 15:42:55,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:42:55,070 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:42:55,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:55,071 INFO L225 Difference]: With dead ends: 2175 [2021-06-05 15:42:55,071 INFO L226 Difference]: Without dead ends: 1948 [2021-06-05 15:42:55,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 705.0ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:42:55,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2021-06-05 15:42:55,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1359. [2021-06-05 15:42:55,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 1.9499263622974963) internal successors, (2648), 1358 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:55,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 2648 transitions. [2021-06-05 15:42:55,083 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 2648 transitions. Word has length 39 [2021-06-05 15:42:55,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:55,083 INFO L482 AbstractCegarLoop]: Abstraction has 1359 states and 2648 transitions. [2021-06-05 15:42:55,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:55,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 2648 transitions. [2021-06-05 15:42:55,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:42:55,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:55,084 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:55,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 15:42:55,285 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:55,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:55,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1830892405, now seen corresponding path program 64 times [2021-06-05 15:42:55,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:55,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957253058] [2021-06-05 15:42:55,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:55,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:55,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957253058] [2021-06-05 15:42:55,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957253058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:55,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67883711] [2021-06-05 15:42:55,590 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 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 15:42:55,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:42:55,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:55,617 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:42:55,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:56,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:56,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:56,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:56,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:56,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:56,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:56,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:56,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:42:56,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:56,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:56,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:56,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:42:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:56,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67883711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:56,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:56,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-06-05 15:42:56,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998249751] [2021-06-05 15:42:56,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:42:56,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:56,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:42:56,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:42:56,187 INFO L87 Difference]: Start difference. First operand 1359 states and 2648 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:56,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:56,658 INFO L93 Difference]: Finished difference Result 2695 states and 5412 transitions. [2021-06-05 15:42:56,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:42:56,659 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:42:56,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:56,674 INFO L225 Difference]: With dead ends: 2695 [2021-06-05 15:42:56,674 INFO L226 Difference]: Without dead ends: 2635 [2021-06-05 15:42:56,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 662.0ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:42:56,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-06-05 15:42:56,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 1326. [2021-06-05 15:42:56,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1325 states have (on average 1.9449056603773585) internal successors, (2577), 1325 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:56,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 2577 transitions. [2021-06-05 15:42:56,689 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 2577 transitions. Word has length 39 [2021-06-05 15:42:56,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:56,689 INFO L482 AbstractCegarLoop]: Abstraction has 1326 states and 2577 transitions. [2021-06-05 15:42:56,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:56,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 2577 transitions. [2021-06-05 15:42:56,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:42:56,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:56,691 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:56,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 15:42:56,907 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:56,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:56,908 INFO L82 PathProgramCache]: Analyzing trace with hash 834845323, now seen corresponding path program 65 times [2021-06-05 15:42:56,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:56,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198342352] [2021-06-05 15:42:56,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:57,217 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-06-05 15:42:57,423 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:57,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:57,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198342352] [2021-06-05 15:42:57,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198342352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:57,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887191726] [2021-06-05 15:42:57,423 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 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 15:42:57,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 15:42:57,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:57,553 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 15:42:57,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:58,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:58,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:58,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:58,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:58,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:58,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:58,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:58,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:42:58,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:58,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:58,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:58,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:134, output treesize:7 [2021-06-05 15:42:58,115 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 1 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:58,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887191726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:58,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:58,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-06-05 15:42:58,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156476263] [2021-06-05 15:42:58,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:42:58,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:58,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:42:58,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:42:58,116 INFO L87 Difference]: Start difference. First operand 1326 states and 2577 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:58,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:58,556 INFO L93 Difference]: Finished difference Result 2530 states and 5090 transitions. [2021-06-05 15:42:58,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:42:58,557 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:42:58,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:58,558 INFO L225 Difference]: With dead ends: 2530 [2021-06-05 15:42:58,558 INFO L226 Difference]: Without dead ends: 2290 [2021-06-05 15:42:58,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 840.5ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:42:58,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2021-06-05 15:42:58,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1371. [2021-06-05 15:42:58,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 1.9445255474452554) internal successors, (2664), 1370 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:58,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 2664 transitions. [2021-06-05 15:42:58,570 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 2664 transitions. Word has length 39 [2021-06-05 15:42:58,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:58,570 INFO L482 AbstractCegarLoop]: Abstraction has 1371 states and 2664 transitions. [2021-06-05 15:42:58,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:58,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 2664 transitions. [2021-06-05 15:42:58,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:42:58,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:58,571 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:58,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:58,772 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:58,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:58,772 INFO L82 PathProgramCache]: Analyzing trace with hash 493862395, now seen corresponding path program 66 times [2021-06-05 15:42:58,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:58,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502142853] [2021-06-05 15:42:58,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:59,007 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:59,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:59,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502142853] [2021-06-05 15:42:59,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502142853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:59,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962773272] [2021-06-05 15:42:59,008 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 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 15:42:59,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:42:59,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:59,037 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:42:59,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:59,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:59,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:59,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:59,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:59,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:59,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:59,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:59,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:42:59,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:59,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:59,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:59,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:42:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:59,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962773272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:59,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:59,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-06-05 15:42:59,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585901558] [2021-06-05 15:42:59,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:42:59,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:59,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:42:59,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:42:59,553 INFO L87 Difference]: Start difference. First operand 1371 states and 2664 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:59,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:59,835 INFO L93 Difference]: Finished difference Result 1989 states and 3938 transitions. [2021-06-05 15:42:59,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:42:59,835 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:42:59,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:59,837 INFO L225 Difference]: With dead ends: 1989 [2021-06-05 15:42:59,837 INFO L226 Difference]: Without dead ends: 1967 [2021-06-05 15:42:59,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 596.9ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:42:59,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-06-05 15:42:59,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1374. [2021-06-05 15:42:59,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 1.9446467589220684) internal successors, (2670), 1373 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:59,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2670 transitions. [2021-06-05 15:42:59,848 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2670 transitions. Word has length 39 [2021-06-05 15:42:59,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:59,848 INFO L482 AbstractCegarLoop]: Abstraction has 1374 states and 2670 transitions. [2021-06-05 15:42:59,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:59,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2670 transitions. [2021-06-05 15:42:59,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:42:59,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:59,849 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:00,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:00,050 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:00,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:00,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1724860693, now seen corresponding path program 67 times [2021-06-05 15:43:00,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:00,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387457128] [2021-06-05 15:43:00,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:00,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:00,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387457128] [2021-06-05 15:43:00,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387457128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:00,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591122401] [2021-06-05 15:43:00,307 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 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 15:43:00,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:00,332 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:43:00,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:00,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:00,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:00,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:00,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:00,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:00,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:00,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:43:00,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:00,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:00,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:00,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:43:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:00,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591122401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:00,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:00,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-06-05 15:43:00,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886961749] [2021-06-05 15:43:00,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:43:00,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:00,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:43:00,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:43:00,822 INFO L87 Difference]: Start difference. First operand 1374 states and 2670 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:01,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:01,351 INFO L93 Difference]: Finished difference Result 3158 states and 6442 transitions. [2021-06-05 15:43:01,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:43:01,351 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:43:01,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:01,353 INFO L225 Difference]: With dead ends: 3158 [2021-06-05 15:43:01,353 INFO L226 Difference]: Without dead ends: 3018 [2021-06-05 15:43:01,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 608.6ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:43:01,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2021-06-05 15:43:01,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 795. [2021-06-05 15:43:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 2.013853904282116) internal successors, (1599), 794 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:01,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1599 transitions. [2021-06-05 15:43:01,365 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1599 transitions. Word has length 39 [2021-06-05 15:43:01,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:01,365 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 1599 transitions. [2021-06-05 15:43:01,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:01,365 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1599 transitions. [2021-06-05 15:43:01,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:43:01,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:01,366 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:01,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:01,566 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:01,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:01,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1458815419, now seen corresponding path program 68 times [2021-06-05 15:43:01,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:01,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807828942] [2021-06-05 15:43:01,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:01,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:01,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807828942] [2021-06-05 15:43:01,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807828942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:01,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283900052] [2021-06-05 15:43:01,816 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 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 15:43:01,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:43:01,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:01,842 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:43:01,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:02,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:02,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:02,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:02,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:02,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:02,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:02,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:43:02,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:02,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:02,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:02,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:43:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:02,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283900052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:02,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:02,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-06-05 15:43:02,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358510844] [2021-06-05 15:43:02,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:43:02,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:02,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:43:02,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:43:02,342 INFO L87 Difference]: Start difference. First operand 795 states and 1599 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:03,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:03,043 INFO L93 Difference]: Finished difference Result 2070 states and 4261 transitions. [2021-06-05 15:43:03,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:43:03,043 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:43:03,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:03,045 INFO L225 Difference]: With dead ends: 2070 [2021-06-05 15:43:03,045 INFO L226 Difference]: Without dead ends: 2009 [2021-06-05 15:43:03,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 604.7ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:43:03,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2021-06-05 15:43:03,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 786. [2021-06-05 15:43:03,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.0140127388535034) internal successors, (1581), 785 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:03,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1581 transitions. [2021-06-05 15:43:03,055 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1581 transitions. Word has length 39 [2021-06-05 15:43:03,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:03,055 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 1581 transitions. [2021-06-05 15:43:03,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:03,055 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1581 transitions. [2021-06-05 15:43:03,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:43:03,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:03,056 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:03,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 15:43:03,256 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:03,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:03,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1117832491, now seen corresponding path program 69 times [2021-06-05 15:43:03,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:03,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007004479] [2021-06-05 15:43:03,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:03,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:03,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:03,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007004479] [2021-06-05 15:43:03,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007004479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:03,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504913945] [2021-06-05 15:43:03,523 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 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 15:43:03,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:43:03,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:03,551 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:43:03,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:04,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:04,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:04,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:04,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:04,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:04,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:04,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:43:04,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:04,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:04,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:04,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:43:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:04,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504913945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:04,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:04,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-06-05 15:43:04,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491313751] [2021-06-05 15:43:04,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:43:04,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:04,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:43:04,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:43:04,104 INFO L87 Difference]: Start difference. First operand 786 states and 1581 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:04,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:04,486 INFO L93 Difference]: Finished difference Result 1866 states and 3843 transitions. [2021-06-05 15:43:04,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:43:04,487 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:43:04,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:04,488 INFO L225 Difference]: With dead ends: 1866 [2021-06-05 15:43:04,489 INFO L226 Difference]: Without dead ends: 1802 [2021-06-05 15:43:04,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 627.8ms TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:43:04,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-06-05 15:43:04,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 792. [2021-06-05 15:43:04,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 2.013906447534766) internal successors, (1593), 791 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:04,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1593 transitions. [2021-06-05 15:43:04,498 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1593 transitions. Word has length 39 [2021-06-05 15:43:04,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:04,498 INFO L482 AbstractCegarLoop]: Abstraction has 792 states and 1593 transitions. [2021-06-05 15:43:04,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:04,498 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1593 transitions. [2021-06-05 15:43:04,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:43:04,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:04,498 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:04,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:04,699 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:04,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:04,699 INFO L82 PathProgramCache]: Analyzing trace with hash 350255179, now seen corresponding path program 70 times [2021-06-05 15:43:04,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:04,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624385288] [2021-06-05 15:43:04,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:04,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:04,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624385288] [2021-06-05 15:43:04,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624385288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:04,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624994410] [2021-06-05 15:43:04,929 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 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 15:43:04,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:43:04,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:04,955 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:43:04,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:05,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:05,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:05,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:05,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:05,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:05,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:43:05,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:05,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:05,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:05,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:43:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:05,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624994410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:05,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:05,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-06-05 15:43:05,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091887393] [2021-06-05 15:43:05,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:43:05,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:05,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:43:05,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:43:05,410 INFO L87 Difference]: Start difference. First operand 792 states and 1593 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:06,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:06,081 INFO L93 Difference]: Finished difference Result 1711 states and 3435 transitions. [2021-06-05 15:43:06,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:43:06,081 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:43:06,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:06,082 INFO L225 Difference]: With dead ends: 1711 [2021-06-05 15:43:06,082 INFO L226 Difference]: Without dead ends: 1381 [2021-06-05 15:43:06,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 782.4ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:43:06,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-06-05 15:43:06,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 885. [2021-06-05 15:43:06,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.005656108597285) internal successors, (1773), 884 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:06,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1773 transitions. [2021-06-05 15:43:06,090 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1773 transitions. Word has length 39 [2021-06-05 15:43:06,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:06,090 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 1773 transitions. [2021-06-05 15:43:06,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:06,090 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1773 transitions. [2021-06-05 15:43:06,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:43:06,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:06,091 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:06,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:06,293 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:06,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:06,293 INFO L82 PathProgramCache]: Analyzing trace with hash -154414005, now seen corresponding path program 71 times [2021-06-05 15:43:06,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:06,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990616496] [2021-06-05 15:43:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:06,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:06,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990616496] [2021-06-05 15:43:06,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990616496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:06,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603069590] [2021-06-05 15:43:06,548 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 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 15:43:06,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:43:06,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:06,577 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-05 15:43:06,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:11,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:11,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:11,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:11,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:11,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:11,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:11,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:11,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:11,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 38 [2021-06-05 15:43:11,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:11,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:11,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:11,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:104, output treesize:3 [2021-06-05 15:43:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:11,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603069590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:11,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:11,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 15:43:11,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226740157] [2021-06-05 15:43:11,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:43:11,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:11,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:43:11,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=962, Unknown=1, NotChecked=0, Total=1056 [2021-06-05 15:43:11,751 INFO L87 Difference]: Start difference. First operand 885 states and 1773 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:20,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:20,124 INFO L93 Difference]: Finished difference Result 2776 states and 5550 transitions. [2021-06-05 15:44:20,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 15:44:20,124 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:44:20,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:20,126 INFO L225 Difference]: With dead ends: 2776 [2021-06-05 15:44:20,126 INFO L226 Difference]: Without dead ends: 2481 [2021-06-05 15:44:20,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 32239.0ms TimeCoverageRelationStatistics Valid=392, Invalid=5299, Unknown=9, NotChecked=0, Total=5700 [2021-06-05 15:44:20,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-06-05 15:44:20,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 1028. [2021-06-05 15:44:20,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 2.0136319376825704) internal successors, (2068), 1027 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 15:44:20,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 2068 transitions. [2021-06-05 15:44:20,138 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 2068 transitions. Word has length 39 [2021-06-05 15:44:20,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:20,138 INFO L482 AbstractCegarLoop]: Abstraction has 1028 states and 2068 transitions. [2021-06-05 15:44:20,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:20,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 2068 transitions. [2021-06-05 15:44:20,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:44:20,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:20,139 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:20,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:20,339 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:20,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:20,340 INFO L82 PathProgramCache]: Analyzing trace with hash -495396933, now seen corresponding path program 72 times [2021-06-05 15:44:20,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:20,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658199675] [2021-06-05 15:44:20,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:20,611 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:20,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:20,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658199675] [2021-06-05 15:44:20,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658199675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:20,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677754112] [2021-06-05 15:44:20,612 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 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 15:44:20,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:44:20,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:20,639 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:44:20,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:21,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:21,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:21,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:21,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:21,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:21,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:44:21,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:21,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:21,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:21,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:44:21,121 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:21,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677754112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:21,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:21,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2021-06-05 15:44:21,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323595150] [2021-06-05 15:44:21,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:44:21,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:21,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:44:21,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:44:21,122 INFO L87 Difference]: Start difference. First operand 1028 states and 2068 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:21,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:21,421 INFO L93 Difference]: Finished difference Result 1646 states and 3342 transitions. [2021-06-05 15:44:21,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:44:21,421 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:44:21,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:21,423 INFO L225 Difference]: With dead ends: 1646 [2021-06-05 15:44:21,423 INFO L226 Difference]: Without dead ends: 1624 [2021-06-05 15:44:21,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 618.8ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:44:21,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2021-06-05 15:44:21,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1031. [2021-06-05 15:44:21,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 2.013592233009709) internal successors, (2074), 1030 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:21,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 2074 transitions. [2021-06-05 15:44:21,432 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 2074 transitions. Word has length 39 [2021-06-05 15:44:21,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:21,432 INFO L482 AbstractCegarLoop]: Abstraction has 1031 states and 2074 transitions. [2021-06-05 15:44:21,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:21,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 2074 transitions. [2021-06-05 15:44:21,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:44:21,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:21,433 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:21,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 15:44:21,633 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:21,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:21,633 INFO L82 PathProgramCache]: Analyzing trace with hash -435485973, now seen corresponding path program 73 times [2021-06-05 15:44:21,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:21,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604451072] [2021-06-05 15:44:21,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:21,891 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:21,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:21,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604451072] [2021-06-05 15:44:21,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604451072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:21,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469222154] [2021-06-05 15:44:21,891 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 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 15:44:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:21,915 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:44:21,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:22,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:22,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:22,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:22,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:22,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:44:22,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:22,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:22,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:22,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:44:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:22,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469222154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:22,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:22,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-06-05 15:44:22,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546510515] [2021-06-05 15:44:22,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:44:22,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:22,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:44:22,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:44:22,365 INFO L87 Difference]: Start difference. First operand 1031 states and 2074 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:22,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:22,710 INFO L93 Difference]: Finished difference Result 2173 states and 4427 transitions. [2021-06-05 15:44:22,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:44:22,711 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:44:22,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:22,712 INFO L225 Difference]: With dead ends: 2173 [2021-06-05 15:44:22,713 INFO L226 Difference]: Without dead ends: 2130 [2021-06-05 15:44:22,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 573.3ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:44:22,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2021-06-05 15:44:22,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 1070. [2021-06-05 15:44:22,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1069 states have (on average 2.0130963517305895) internal successors, (2152), 1069 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 2152 transitions. [2021-06-05 15:44:22,723 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 2152 transitions. Word has length 39 [2021-06-05 15:44:22,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:22,723 INFO L482 AbstractCegarLoop]: Abstraction has 1070 states and 2152 transitions. [2021-06-05 15:44:22,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:22,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 2152 transitions. [2021-06-05 15:44:22,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:44:22,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:22,724 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:22,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:22,924 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:22,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:22,925 INFO L82 PathProgramCache]: Analyzing trace with hash -327707125, now seen corresponding path program 74 times [2021-06-05 15:44:22,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:22,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37416818] [2021-06-05 15:44:22,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:23,152 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:23,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:23,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37416818] [2021-06-05 15:44:23,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37416818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:23,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079712662] [2021-06-05 15:44:23,152 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 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 15:44:23,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:44:23,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:23,178 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:44:23,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:23,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:23,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:23,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:23,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:44:23,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:23,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:23,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:23,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:44:23,569 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:23,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079712662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:23,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:23,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 23 [2021-06-05 15:44:23,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674690671] [2021-06-05 15:44:23,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:44:23,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:23,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:44:23,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:44:23,569 INFO L87 Difference]: Start difference. First operand 1070 states and 2152 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:24,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:24,268 INFO L93 Difference]: Finished difference Result 1889 states and 3781 transitions. [2021-06-05 15:44:24,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:44:24,268 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:44:24,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:24,270 INFO L225 Difference]: With dead ends: 1889 [2021-06-05 15:44:24,270 INFO L226 Difference]: Without dead ends: 1614 [2021-06-05 15:44:24,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 795.4ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:44:24,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-06-05 15:44:24,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1130. [2021-06-05 15:44:24,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 2.008857395925598) internal successors, (2268), 1129 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:24,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 2268 transitions. [2021-06-05 15:44:24,279 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 2268 transitions. Word has length 39 [2021-06-05 15:44:24,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:24,279 INFO L482 AbstractCegarLoop]: Abstraction has 1130 states and 2268 transitions. [2021-06-05 15:44:24,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:24,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 2268 transitions. [2021-06-05 15:44:24,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:44:24,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:24,280 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:24,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 15:44:24,481 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:24,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:24,481 INFO L82 PathProgramCache]: Analyzing trace with hash -853246965, now seen corresponding path program 75 times [2021-06-05 15:44:24,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:24,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387521086] [2021-06-05 15:44:24,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:24,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:24,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387521086] [2021-06-05 15:44:24,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387521086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:24,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440426875] [2021-06-05 15:44:24,706 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 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 15:44:24,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:44:24,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:24,733 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 15:44:24,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:25,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:25,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:25,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:25,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:25,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:25,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 48 [2021-06-05 15:44:25,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:25,315 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 15:44:25,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:25,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:144, output treesize:7 [2021-06-05 15:44:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:25,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440426875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:25,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:25,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 26 [2021-06-05 15:44:25,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815282569] [2021-06-05 15:44:25,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:44:25,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:25,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:44:25,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:44:25,326 INFO L87 Difference]: Start difference. First operand 1130 states and 2268 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:26,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:26,548 INFO L93 Difference]: Finished difference Result 2002 states and 3962 transitions. [2021-06-05 15:44:26,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:44:26,548 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:44:26,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:26,550 INFO L225 Difference]: With dead ends: 2002 [2021-06-05 15:44:26,550 INFO L226 Difference]: Without dead ends: 1688 [2021-06-05 15:44:26,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1267.4ms TimeCoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:44:26,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2021-06-05 15:44:26,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1157. [2021-06-05 15:44:26,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.0051903114186853) internal successors, (2318), 1156 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:26,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 2318 transitions. [2021-06-05 15:44:26,560 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 2318 transitions. Word has length 39 [2021-06-05 15:44:26,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:26,560 INFO L482 AbstractCegarLoop]: Abstraction has 1157 states and 2318 transitions. [2021-06-05 15:44:26,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:26,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 2318 transitions. [2021-06-05 15:44:26,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:44:26,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:26,561 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:26,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:26,761 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:26,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:26,761 INFO L82 PathProgramCache]: Analyzing trace with hash 909107723, now seen corresponding path program 76 times [2021-06-05 15:44:26,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:26,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324377240] [2021-06-05 15:44:26,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:26,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:26,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324377240] [2021-06-05 15:44:26,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324377240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:26,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523156912] [2021-06-05 15:44:26,990 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 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 15:44:27,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:44:27,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:27,015 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:44:27,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:27,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:27,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:27,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:44:27,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:27,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:27,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:27,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:44:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:27,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523156912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:27,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:27,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 23 [2021-06-05 15:44:27,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169887664] [2021-06-05 15:44:27,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:44:27,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:27,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:44:27,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:44:27,455 INFO L87 Difference]: Start difference. First operand 1157 states and 2318 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:28,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:28,154 INFO L93 Difference]: Finished difference Result 2390 states and 4766 transitions. [2021-06-05 15:44:28,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:44:28,154 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:44:28,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:28,156 INFO L225 Difference]: With dead ends: 2390 [2021-06-05 15:44:28,156 INFO L226 Difference]: Without dead ends: 2089 [2021-06-05 15:44:28,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 823.8ms TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:44:28,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-06-05 15:44:28,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1493. [2021-06-05 15:44:28,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1493 states, 1492 states have (on average 1.9845844504021448) internal successors, (2961), 1492 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:28,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2961 transitions. [2021-06-05 15:44:28,168 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2961 transitions. Word has length 39 [2021-06-05 15:44:28,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:28,168 INFO L482 AbstractCegarLoop]: Abstraction has 1493 states and 2961 transitions. [2021-06-05 15:44:28,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:28,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2961 transitions. [2021-06-05 15:44:28,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:44:28,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:28,169 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:28,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:28,370 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:28,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:28,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1471668869, now seen corresponding path program 77 times [2021-06-05 15:44:28,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:28,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432856111] [2021-06-05 15:44:28,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:28,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:28,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432856111] [2021-06-05 15:44:28,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432856111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:28,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665472540] [2021-06-05 15:44:28,581 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 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 15:44:28,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:44:28,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:28,609 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:44:28,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:29,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:29,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:29,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:29,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:29,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:29,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:29,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 48 [2021-06-05 15:44:29,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:29,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:29,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:29,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:135, output treesize:7 [2021-06-05 15:44:29,294 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:29,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665472540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:29,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:29,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-05 15:44:29,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125632594] [2021-06-05 15:44:29,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:44:29,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:29,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:44:29,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:44:29,295 INFO L87 Difference]: Start difference. First operand 1493 states and 2961 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:31,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:31,751 INFO L93 Difference]: Finished difference Result 3509 states and 6960 transitions. [2021-06-05 15:44:31,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:44:31,751 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:44:31,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:31,753 INFO L225 Difference]: With dead ends: 3509 [2021-06-05 15:44:31,753 INFO L226 Difference]: Without dead ends: 3088 [2021-06-05 15:44:31,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 2010.8ms TimeCoverageRelationStatistics Valid=240, Invalid=2412, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:44:31,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3088 states. [2021-06-05 15:44:31,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3088 to 1542. [2021-06-05 15:44:31,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1541 states have (on average 1.9798831927319922) internal successors, (3051), 1541 states have internal predecessors, (3051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:31,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 3051 transitions. [2021-06-05 15:44:31,768 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 3051 transitions. Word has length 39 [2021-06-05 15:44:31,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:31,768 INFO L482 AbstractCegarLoop]: Abstraction has 1542 states and 3051 transitions. [2021-06-05 15:44:31,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:31,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 3051 transitions. [2021-06-05 15:44:31,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:44:31,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:31,769 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:31,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:31,970 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:31,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:31,970 INFO L82 PathProgramCache]: Analyzing trace with hash 63455611, now seen corresponding path program 78 times [2021-06-05 15:44:31,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:31,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146725694] [2021-06-05 15:44:31,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:31,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:32,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:32,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146725694] [2021-06-05 15:44:32,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146725694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:32,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810596632] [2021-06-05 15:44:32,253 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 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 15:44:32,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:44:32,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:32,279 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:44:32,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:32,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:32,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:32,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:44:32,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:32,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:32,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:32,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:44:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:32,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810596632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:32,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:32,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 15:44:32,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888624445] [2021-06-05 15:44:32,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:44:32,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:32,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:44:32,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:44:32,708 INFO L87 Difference]: Start difference. First operand 1542 states and 3051 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:32,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:32,970 INFO L93 Difference]: Finished difference Result 2925 states and 5994 transitions. [2021-06-05 15:44:32,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:44:32,970 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:44:32,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:32,972 INFO L225 Difference]: With dead ends: 2925 [2021-06-05 15:44:32,972 INFO L226 Difference]: Without dead ends: 2803 [2021-06-05 15:44:32,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 570.1ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:44:32,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2021-06-05 15:44:32,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 1557. [2021-06-05 15:44:32,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 1.9800771208226222) internal successors, (3081), 1556 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:32,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 3081 transitions. [2021-06-05 15:44:32,990 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 3081 transitions. Word has length 39 [2021-06-05 15:44:32,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:32,990 INFO L482 AbstractCegarLoop]: Abstraction has 1557 states and 3081 transitions. [2021-06-05 15:44:32,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:32,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 3081 transitions. [2021-06-05 15:44:32,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:44:32,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:32,991 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:33,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:33,207 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:33,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:33,207 INFO L82 PathProgramCache]: Analyzing trace with hash 818819387, now seen corresponding path program 79 times [2021-06-05 15:44:33,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:33,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762556294] [2021-06-05 15:44:33,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:33,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:33,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762556294] [2021-06-05 15:44:33,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762556294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:33,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672313571] [2021-06-05 15:44:33,436 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 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 15:44:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:33,461 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:44:33,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:33,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:33,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:33,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:33,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:33,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:33,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:33,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:33,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:33,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:33,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:33,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:33,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:33,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:33,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:33,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:33,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:33,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:33,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:33,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:33,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:33,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:33,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:33,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:33,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:44:33,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:33,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:33,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:33,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:44:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:33,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672313571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:33,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:33,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 22 [2021-06-05 15:44:33,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845034933] [2021-06-05 15:44:33,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:44:33,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:33,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:44:33,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:44:33,833 INFO L87 Difference]: Start difference. First operand 1557 states and 3081 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:34,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:34,480 INFO L93 Difference]: Finished difference Result 2411 states and 4790 transitions. [2021-06-05 15:44:34,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:44:34,480 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:44:34,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:34,482 INFO L225 Difference]: With dead ends: 2411 [2021-06-05 15:44:34,482 INFO L226 Difference]: Without dead ends: 2119 [2021-06-05 15:44:34,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 839.8ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:44:34,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-06-05 15:44:34,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1674. [2021-06-05 15:44:34,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 1.9796772265391511) internal successors, (3312), 1673 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:34,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 3312 transitions. [2021-06-05 15:44:34,496 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 3312 transitions. Word has length 39 [2021-06-05 15:44:34,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:34,496 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 3312 transitions. [2021-06-05 15:44:34,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:34,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 3312 transitions. [2021-06-05 15:44:34,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:44:34,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:34,498 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:34,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:34,698 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:34,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:34,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1561957205, now seen corresponding path program 80 times [2021-06-05 15:44:34,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:34,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493974261] [2021-06-05 15:44:34,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:34,918 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:34,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:34,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493974261] [2021-06-05 15:44:34,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493974261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:34,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638266185] [2021-06-05 15:44:34,919 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 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 15:44:34,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:44:34,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:34,943 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:44:34,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:35,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:35,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:35,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:35,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:35,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:35,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:35,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:35,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:35,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:35,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:35,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:35,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:35,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:35,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:35,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:35,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:35,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:35,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:35,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:35,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:35,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:35,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:35,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:35,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:35,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:44:35,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:35,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:35,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:35,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:44:35,315 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:35,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638266185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:35,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:35,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 22 [2021-06-05 15:44:35,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823356863] [2021-06-05 15:44:35,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:44:35,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:35,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:44:35,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:44:35,316 INFO L87 Difference]: Start difference. First operand 1674 states and 3312 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:35,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:35,702 INFO L93 Difference]: Finished difference Result 2847 states and 5742 transitions. [2021-06-05 15:44:35,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:44:35,702 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:44:35,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:35,705 INFO L225 Difference]: With dead ends: 2847 [2021-06-05 15:44:35,705 INFO L226 Difference]: Without dead ends: 2791 [2021-06-05 15:44:35,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 478.8ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:44:35,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-06-05 15:44:35,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 1659. [2021-06-05 15:44:35,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1658 states have (on average 1.9782870928829916) internal successors, (3280), 1658 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:35,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 3280 transitions. [2021-06-05 15:44:35,720 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 3280 transitions. Word has length 39 [2021-06-05 15:44:35,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:35,720 INFO L482 AbstractCegarLoop]: Abstraction has 1659 states and 3280 transitions. [2021-06-05 15:44:35,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:35,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 3280 transitions. [2021-06-05 15:44:35,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:44:35,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:35,722 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:35,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:35,937 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:35,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:35,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1060323669, now seen corresponding path program 81 times [2021-06-05 15:44:35,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:35,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288776835] [2021-06-05 15:44:35,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:36,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:36,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288776835] [2021-06-05 15:44:36,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288776835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:36,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538352198] [2021-06-05 15:44:36,197 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 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 15:44:36,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:44:36,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:36,232 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 15:44:36,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:36,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:36,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:36,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:36,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:36,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:36,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:36,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 48 [2021-06-05 15:44:36,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:36,833 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 15:44:36,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:36,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:144, output treesize:7 [2021-06-05 15:44:36,842 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:36,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538352198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:36,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:36,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 27 [2021-06-05 15:44:36,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980815558] [2021-06-05 15:44:36,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:44:36,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:36,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:44:36,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:44:36,843 INFO L87 Difference]: Start difference. First operand 1659 states and 3280 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:38,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:38,344 INFO L93 Difference]: Finished difference Result 3263 states and 6548 transitions. [2021-06-05 15:44:38,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:44:38,344 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:44:38,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:38,346 INFO L225 Difference]: With dead ends: 3263 [2021-06-05 15:44:38,346 INFO L226 Difference]: Without dead ends: 3144 [2021-06-05 15:44:38,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1352.6ms TimeCoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:44:38,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2021-06-05 15:44:38,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 1719. [2021-06-05 15:44:38,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.980209545983702) internal successors, (3402), 1718 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 15:44:38,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 3402 transitions. [2021-06-05 15:44:38,364 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 3402 transitions. Word has length 39 [2021-06-05 15:44:38,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:38,364 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 3402 transitions. [2021-06-05 15:44:38,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:38,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 3402 transitions. [2021-06-05 15:44:38,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:44:38,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:38,365 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:38,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:38,577 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:38,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:38,577 INFO L82 PathProgramCache]: Analyzing trace with hash -26832725, now seen corresponding path program 82 times [2021-06-05 15:44:38,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:38,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190096175] [2021-06-05 15:44:38,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:38,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:38,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190096175] [2021-06-05 15:44:38,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190096175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:38,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530601614] [2021-06-05 15:44:38,850 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 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 15:44:38,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:44:38,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:38,889 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:44:38,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:39,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:39,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:39,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:39,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:39,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:39,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:39,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:39,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:39,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:39,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:39,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:39,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:39,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:39,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:39,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:39,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:39,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:39,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:39,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:39,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:39,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:39,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:39,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:44:39,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:39,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:39,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:39,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:44:39,289 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:39,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530601614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:39,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:39,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-06-05 15:44:39,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230492021] [2021-06-05 15:44:39,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:44:39,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:39,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:44:39,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:44:39,290 INFO L87 Difference]: Start difference. First operand 1719 states and 3402 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:39,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:39,692 INFO L93 Difference]: Finished difference Result 3005 states and 6062 transitions. [2021-06-05 15:44:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:44:39,692 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:44:39,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:39,695 INFO L225 Difference]: With dead ends: 3005 [2021-06-05 15:44:39,695 INFO L226 Difference]: Without dead ends: 2947 [2021-06-05 15:44:39,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 539.7ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:44:39,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2021-06-05 15:44:39,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 1719. [2021-06-05 15:44:39,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.980209545983702) internal successors, (3402), 1718 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 15:44:39,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 3402 transitions. [2021-06-05 15:44:39,711 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 3402 transitions. Word has length 39 [2021-06-05 15:44:39,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:39,711 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 3402 transitions. [2021-06-05 15:44:39,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:39,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 3402 transitions. [2021-06-05 15:44:39,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:44:39,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:39,712 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:39,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 15:44:39,913 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:39,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:39,913 INFO L82 PathProgramCache]: Analyzing trace with hash -2007368901, now seen corresponding path program 83 times [2021-06-05 15:44:39,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:39,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968851072] [2021-06-05 15:44:39,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:40,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:40,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968851072] [2021-06-05 15:44:40,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968851072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:40,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232100248] [2021-06-05 15:44:40,209 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 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 15:44:40,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:44:40,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:40,249 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 15:44:40,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:40,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:40,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:40,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:40,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:40,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:40,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:40,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:40,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:40,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:40,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:40,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:40,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:40,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:40,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:40,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:40,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:40,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:40,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:40,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:40,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:40,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:40,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:40,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:44:40,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:40,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:40,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:40,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:44:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:40,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232100248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:40,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:40,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-06-05 15:44:40,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745810537] [2021-06-05 15:44:40,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:44:40,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:40,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:44:40,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:44:40,662 INFO L87 Difference]: Start difference. First operand 1719 states and 3402 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:41,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:41,008 INFO L93 Difference]: Finished difference Result 2585 states and 5147 transitions. [2021-06-05 15:44:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:44:41,008 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:44:41,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:41,010 INFO L225 Difference]: With dead ends: 2585 [2021-06-05 15:44:41,010 INFO L226 Difference]: Without dead ends: 2553 [2021-06-05 15:44:41,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 576.2ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:44:41,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-06-05 15:44:41,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 1750. [2021-06-05 15:44:41,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1749 states have (on average 1.979416809605489) internal successors, (3462), 1749 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:41,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 3462 transitions. [2021-06-05 15:44:41,024 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 3462 transitions. Word has length 39 [2021-06-05 15:44:41,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:41,024 INFO L482 AbstractCegarLoop]: Abstraction has 1750 states and 3462 transitions. [2021-06-05 15:44:41,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:41,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 3462 transitions. [2021-06-05 15:44:41,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:44:41,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:41,025 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:41,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:41,240 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:41,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:41,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1770592930, now seen corresponding path program 84 times [2021-06-05 15:44:41,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:41,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334093784] [2021-06-05 15:44:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:41,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:41,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334093784] [2021-06-05 15:44:41,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334093784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:41,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385133615] [2021-06-05 15:44:41,487 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 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 15:44:41,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:44:41,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:41,514 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:44:41,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:41,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:41,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:41,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:41,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:41,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:41,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:41,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:41,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:41,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:41,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:41,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:41,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:41,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:41,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:41,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:41,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:41,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:41,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:41,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:41,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:41,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:41,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:41,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:41,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:41,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:41,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:41,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 15:44:41,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:41,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:41,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:41,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 15:44:41,920 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:41,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385133615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:41,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:41,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 24 [2021-06-05 15:44:41,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699497007] [2021-06-05 15:44:41,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:44:41,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:41,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:44:41,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:44:41,920 INFO L87 Difference]: Start difference. First operand 1750 states and 3462 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:43,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:43,288 INFO L93 Difference]: Finished difference Result 3417 states and 6971 transitions. [2021-06-05 15:44:43,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:44:43,289 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:44:43,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:43,291 INFO L225 Difference]: With dead ends: 3417 [2021-06-05 15:44:43,291 INFO L226 Difference]: Without dead ends: 3297 [2021-06-05 15:44:43,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1298.7ms TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:44:43,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3297 states. [2021-06-05 15:44:43,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3297 to 1765. [2021-06-05 15:44:43,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1764 states have (on average 1.9795918367346939) internal successors, (3492), 1764 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 15:44:43,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 3492 transitions. [2021-06-05 15:44:43,308 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 3492 transitions. Word has length 42 [2021-06-05 15:44:43,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:43,308 INFO L482 AbstractCegarLoop]: Abstraction has 1765 states and 3492 transitions. [2021-06-05 15:44:43,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:43,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 3492 transitions. [2021-06-05 15:44:43,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:44:43,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:43,310 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:43,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 15:44:43,511 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:43,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:43,512 INFO L82 PathProgramCache]: Analyzing trace with hash -726200285, now seen corresponding path program 85 times [2021-06-05 15:44:43,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:43,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848347765] [2021-06-05 15:44:43,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:43,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:43,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848347765] [2021-06-05 15:44:43,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848347765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:43,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024629652] [2021-06-05 15:44:43,785 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 15:44:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:43,817 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:44:43,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:44,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:44,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:44,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:44,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:44,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:44,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:44,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:44,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:44,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:44:44,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:44,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:44,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:44,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:44:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:44,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024629652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:44,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:44,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-06-05 15:44:44,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168011442] [2021-06-05 15:44:44,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:44:44,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:44,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:44:44,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:44:44,509 INFO L87 Difference]: Start difference. First operand 1765 states and 3492 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:45,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:45,424 INFO L93 Difference]: Finished difference Result 4013 states and 8194 transitions. [2021-06-05 15:44:45,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:44:45,424 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:44:45,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:45,427 INFO L225 Difference]: With dead ends: 4013 [2021-06-05 15:44:45,427 INFO L226 Difference]: Without dead ends: 3851 [2021-06-05 15:44:45,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 782.3ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:44:45,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2021-06-05 15:44:45,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 1882. [2021-06-05 15:44:45,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 1.977671451355662) internal successors, (3720), 1881 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:45,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 3720 transitions. [2021-06-05 15:44:45,448 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 3720 transitions. Word has length 43 [2021-06-05 15:44:45,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:45,448 INFO L482 AbstractCegarLoop]: Abstraction has 1882 states and 3720 transitions. [2021-06-05 15:44:45,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:45,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 3720 transitions. [2021-06-05 15:44:45,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:44:45,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:45,452 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:45,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:45,665 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:45,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:45,665 INFO L82 PathProgramCache]: Analyzing trace with hash 733771603, now seen corresponding path program 86 times [2021-06-05 15:44:45,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:45,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964256980] [2021-06-05 15:44:45,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:45,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:45,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964256980] [2021-06-05 15:44:45,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964256980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:45,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23302283] [2021-06-05 15:44:45,979 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 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 15:44:46,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:44:46,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:46,016 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:44:46,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:46,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:46,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:46,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:46,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:46,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:46,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:46,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:46,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:44:46,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:46,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:46,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:46,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:44:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:46,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23302283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:46,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:46,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-06-05 15:44:46,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305841413] [2021-06-05 15:44:46,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:44:46,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:46,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:44:46,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:44:46,748 INFO L87 Difference]: Start difference. First operand 1882 states and 3720 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:47,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:47,690 INFO L93 Difference]: Finished difference Result 3614 states and 7238 transitions. [2021-06-05 15:44:47,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:44:47,690 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:44:47,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:47,693 INFO L225 Difference]: With dead ends: 3614 [2021-06-05 15:44:47,693 INFO L226 Difference]: Without dead ends: 3586 [2021-06-05 15:44:47,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 805.0ms TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:44:47,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-06-05 15:44:47,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 1927. [2021-06-05 15:44:47,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1926 states have (on average 1.9792315680166148) internal successors, (3812), 1926 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 15:44:47,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 3812 transitions. [2021-06-05 15:44:47,711 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 3812 transitions. Word has length 43 [2021-06-05 15:44:47,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:47,711 INFO L482 AbstractCegarLoop]: Abstraction has 1927 states and 3812 transitions. [2021-06-05 15:44:47,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:47,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 3812 transitions. [2021-06-05 15:44:47,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:44:47,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:47,712 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:47,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:47,913 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:47,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:47,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1669781235, now seen corresponding path program 87 times [2021-06-05 15:44:47,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:47,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882597767] [2021-06-05 15:44:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:48,209 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:48,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:48,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882597767] [2021-06-05 15:44:48,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882597767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:48,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767983533] [2021-06-05 15:44:48,210 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 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 15:44:48,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:44:48,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:48,237 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 15:44:48,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:48,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:48,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:48,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:48,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:48,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:48,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:48,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:48,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:48,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 55 [2021-06-05 15:44:48,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:48,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:48,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:48,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:157, output treesize:7 [2021-06-05 15:44:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:48,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767983533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:48,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:48,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-06-05 15:44:48,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680823131] [2021-06-05 15:44:48,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:44:48,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:48,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:44:48,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:44:48,942 INFO L87 Difference]: Start difference. First operand 1927 states and 3812 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:49,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:49,550 INFO L93 Difference]: Finished difference Result 4338 states and 8863 transitions. [2021-06-05 15:44:49,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:44:49,550 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:44:49,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:49,553 INFO L225 Difference]: With dead ends: 4338 [2021-06-05 15:44:49,553 INFO L226 Difference]: Without dead ends: 4168 [2021-06-05 15:44:49,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 824.3ms TimeCoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:44:49,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-06-05 15:44:49,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 1762. [2021-06-05 15:44:49,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 1.9806927881885292) internal successors, (3488), 1761 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:49,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 3488 transitions. [2021-06-05 15:44:49,573 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 3488 transitions. Word has length 43 [2021-06-05 15:44:49,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:49,574 INFO L482 AbstractCegarLoop]: Abstraction has 1762 states and 3488 transitions. [2021-06-05 15:44:49,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:49,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 3488 transitions. [2021-06-05 15:44:49,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:44:49,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:49,575 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:49,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:49,790 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:49,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:49,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1165214173, now seen corresponding path program 88 times [2021-06-05 15:44:49,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:49,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520104124] [2021-06-05 15:44:49,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:49,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:50,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:50,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520104124] [2021-06-05 15:44:50,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520104124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:50,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527321438] [2021-06-05 15:44:50,081 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 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 15:44:50,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:44:50,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:50,106 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:44:50,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:50,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:50,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:50,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:50,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:50,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:50,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:50,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:50,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:50,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:44:50,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:50,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:50,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:50,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:44:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:50,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527321438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:50,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:50,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-06-05 15:44:50,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33367119] [2021-06-05 15:44:50,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:44:50,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:50,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:44:50,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:44:50,819 INFO L87 Difference]: Start difference. First operand 1762 states and 3488 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:51,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:51,429 INFO L93 Difference]: Finished difference Result 3585 states and 7206 transitions. [2021-06-05 15:44:51,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:44:51,430 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:44:51,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:51,432 INFO L225 Difference]: With dead ends: 3585 [2021-06-05 15:44:51,432 INFO L226 Difference]: Without dead ends: 3557 [2021-06-05 15:44:51,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 808.2ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:44:51,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2021-06-05 15:44:51,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 1810. [2021-06-05 15:44:51,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 1.9773355444997236) internal successors, (3577), 1809 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:51,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 3577 transitions. [2021-06-05 15:44:51,449 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 3577 transitions. Word has length 43 [2021-06-05 15:44:51,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:51,449 INFO L482 AbstractCegarLoop]: Abstraction has 1810 states and 3577 transitions. [2021-06-05 15:44:51,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:51,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 3577 transitions. [2021-06-05 15:44:51,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:44:51,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:51,450 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:51,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:51,651 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:51,651 INFO L82 PathProgramCache]: Analyzing trace with hash -2078296685, now seen corresponding path program 89 times [2021-06-05 15:44:51,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:51,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478419597] [2021-06-05 15:44:51,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:51,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:51,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:51,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478419597] [2021-06-05 15:44:51,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478419597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:51,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016284118] [2021-06-05 15:44:51,994 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 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 15:44:52,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:44:52,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:52,032 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:44:52,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:52,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:52,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:52,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:52,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:52,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:52,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:52,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:52,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:44:52,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:52,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:52,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:52,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:44:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:52,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016284118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:52,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:52,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-06-05 15:44:52,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140385530] [2021-06-05 15:44:52,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:44:52,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:52,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:44:52,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:44:52,788 INFO L87 Difference]: Start difference. First operand 1810 states and 3577 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:53,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:53,379 INFO L93 Difference]: Finished difference Result 3241 states and 6488 transitions. [2021-06-05 15:44:53,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:44:53,380 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:44:53,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:53,382 INFO L225 Difference]: With dead ends: 3241 [2021-06-05 15:44:53,382 INFO L226 Difference]: Without dead ends: 3198 [2021-06-05 15:44:53,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 885.4ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:44:53,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2021-06-05 15:44:53,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 1867. [2021-06-05 15:44:53,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 1.9715969989281887) internal successors, (3679), 1866 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:53,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 3679 transitions. [2021-06-05 15:44:53,398 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 3679 transitions. Word has length 43 [2021-06-05 15:44:53,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:53,399 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 3679 transitions. [2021-06-05 15:44:53,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:53,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 3679 transitions. [2021-06-05 15:44:53,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:44:53,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:53,400 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:53,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 15:44:53,600 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:53,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:53,601 INFO L82 PathProgramCache]: Analyzing trace with hash 850764899, now seen corresponding path program 90 times [2021-06-05 15:44:53,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:53,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112701526] [2021-06-05 15:44:53,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:53,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:53,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112701526] [2021-06-05 15:44:53,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112701526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:53,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42605053] [2021-06-05 15:44:53,830 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 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 15:44:53,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 15:44:53,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:53,857 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:44:53,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:54,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:54,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:54,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:54,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:54,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:54,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:54,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:54,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:44:54,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:54,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:54,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:54,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:44:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:54,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42605053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:54,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:54,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 30 [2021-06-05 15:44:54,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967564813] [2021-06-05 15:44:54,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:44:54,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:54,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:44:54,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:44:54,523 INFO L87 Difference]: Start difference. First operand 1867 states and 3679 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:55,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:55,146 INFO L93 Difference]: Finished difference Result 3671 states and 7373 transitions. [2021-06-05 15:44:55,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:44:55,146 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:44:55,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:55,149 INFO L225 Difference]: With dead ends: 3671 [2021-06-05 15:44:55,149 INFO L226 Difference]: Without dead ends: 3369 [2021-06-05 15:44:55,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 726.1ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:44:55,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3369 states. [2021-06-05 15:44:55,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3369 to 2005. [2021-06-05 15:44:55,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 1.966067864271457) internal successors, (3940), 2004 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:55,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 3940 transitions. [2021-06-05 15:44:55,168 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 3940 transitions. Word has length 43 [2021-06-05 15:44:55,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:55,169 INFO L482 AbstractCegarLoop]: Abstraction has 2005 states and 3940 transitions. [2021-06-05 15:44:55,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:55,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 3940 transitions. [2021-06-05 15:44:55,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:44:55,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:55,170 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:55,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:55,370 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:55,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:55,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1086380131, now seen corresponding path program 91 times [2021-06-05 15:44:55,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:55,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280751790] [2021-06-05 15:44:55,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:55,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:55,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280751790] [2021-06-05 15:44:55,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280751790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:55,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476089458] [2021-06-05 15:44:55,667 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 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 15:44:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:55,692 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:44:55,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:56,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:56,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:56,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:56,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:56,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:56,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:56,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:56,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:56,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:44:56,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:56,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:56,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:56,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:44:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:56,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476089458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:56,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:56,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-06-05 15:44:56,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021001799] [2021-06-05 15:44:56,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:44:56,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:56,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:44:56,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:44:56,383 INFO L87 Difference]: Start difference. First operand 2005 states and 3940 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:56,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:56,860 INFO L93 Difference]: Finished difference Result 3677 states and 7454 transitions. [2021-06-05 15:44:56,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:44:56,861 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:44:56,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:56,864 INFO L225 Difference]: With dead ends: 3677 [2021-06-05 15:44:56,864 INFO L226 Difference]: Without dead ends: 3555 [2021-06-05 15:44:56,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 807.9ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:44:56,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3555 states. [2021-06-05 15:44:56,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3555 to 2026. [2021-06-05 15:44:56,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 2025 states have (on average 1.9664197530864198) internal successors, (3982), 2025 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:56,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 3982 transitions. [2021-06-05 15:44:56,882 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 3982 transitions. Word has length 43 [2021-06-05 15:44:56,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:56,882 INFO L482 AbstractCegarLoop]: Abstraction has 2026 states and 3982 transitions. [2021-06-05 15:44:56,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:56,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 3982 transitions. [2021-06-05 15:44:56,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:44:56,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:56,884 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:57,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 15:44:57,084 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:57,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:57,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1033564323, now seen corresponding path program 92 times [2021-06-05 15:44:57,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:57,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894325574] [2021-06-05 15:44:57,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:57,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:57,329 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:44:57,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:57,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894325574] [2021-06-05 15:44:57,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894325574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:57,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130615524] [2021-06-05 15:44:57,330 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 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 15:44:57,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:44:57,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:57,357 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:44:57,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:57,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:57,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:57,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:57,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:57,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:58,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:58,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:58,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:58,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:58,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:58,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:58,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:58,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:58,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:58,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:58,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:58,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:58,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:58,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:44:58,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:58,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:58,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:58,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:44:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:58,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130615524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:58,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:58,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 29 [2021-06-05 15:44:58,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300431258] [2021-06-05 15:44:58,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:44:58,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:58,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:44:58,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:44:58,022 INFO L87 Difference]: Start difference. First operand 2026 states and 3982 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:58,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:58,915 INFO L93 Difference]: Finished difference Result 2865 states and 5658 transitions. [2021-06-05 15:44:58,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:44:58,916 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:44:58,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:58,918 INFO L225 Difference]: With dead ends: 2865 [2021-06-05 15:44:58,918 INFO L226 Difference]: Without dead ends: 2573 [2021-06-05 15:44:58,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1135.7ms TimeCoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:44:58,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2021-06-05 15:44:58,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 2152. [2021-06-05 15:44:58,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 1.9655973965597398) internal successors, (4228), 2151 states have internal predecessors, (4228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:58,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 4228 transitions. [2021-06-05 15:44:58,933 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 4228 transitions. Word has length 43 [2021-06-05 15:44:58,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:58,933 INFO L482 AbstractCegarLoop]: Abstraction has 2152 states and 4228 transitions. [2021-06-05 15:44:58,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:58,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 4228 transitions. [2021-06-05 15:44:58,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:44:58,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:58,935 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:59,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:59,136 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:59,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:59,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1336709165, now seen corresponding path program 93 times [2021-06-05 15:44:59,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:59,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449279558] [2021-06-05 15:44:59,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:59,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:59,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449279558] [2021-06-05 15:44:59,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449279558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:59,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669872010] [2021-06-05 15:44:59,367 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 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 15:44:59,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:44:59,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:59,396 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-05 15:44:59,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:28,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:45:28,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:45:28,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:45:28,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:45:28,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:45:28,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:28,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:45:28,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:45:28,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 55 [2021-06-05 15:45:28,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:28,172 INFO L628 ElimStorePlain]: treesize reduction 5, result has 86.5 percent of original size [2021-06-05 15:45:28,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:28,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:167, output treesize:7 [2021-06-05 15:45:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:28,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669872010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:28,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:28,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 30 [2021-06-05 15:45:28,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714527217] [2021-06-05 15:45:28,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:45:28,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:28,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:45:28,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=837, Unknown=9, NotChecked=0, Total=930 [2021-06-05 15:45:28,182 INFO L87 Difference]: Start difference. First operand 2152 states and 4228 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:06,436 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2021-06-05 15:46:16,794 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-06-05 15:46:24,338 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 36 [2021-06-05 15:46:59,048 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-06-05 15:47:03,857 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2021-06-05 15:47:26,570 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 53 [2021-06-05 15:47:40,861 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-06-05 15:49:55,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:55,768 INFO L93 Difference]: Finished difference Result 3588 states and 7132 transitions. [2021-06-05 15:49:55,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:49:55,801 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:49:55,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:55,804 INFO L225 Difference]: With dead ends: 3588 [2021-06-05 15:49:55,804 INFO L226 Difference]: Without dead ends: 3323 [2021-06-05 15:49:55,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 95845.9ms TimeCoverageRelationStatistics Valid=196, Invalid=2035, Unknown=25, NotChecked=0, Total=2256 [2021-06-05 15:49:55,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2021-06-05 15:49:55,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 2161. [2021-06-05 15:49:55,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2161 states, 2160 states have (on average 1.963425925925926) internal successors, (4241), 2160 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:55,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2161 states to 2161 states and 4241 transitions. [2021-06-05 15:49:55,823 INFO L78 Accepts]: Start accepts. Automaton has 2161 states and 4241 transitions. Word has length 43 [2021-06-05 15:49:55,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:55,823 INFO L482 AbstractCegarLoop]: Abstraction has 2161 states and 4241 transitions. [2021-06-05 15:49:55,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:55,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2161 states and 4241 transitions. [2021-06-05 15:49:55,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:49:55,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:55,825 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:56,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:56,037 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:56,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:56,037 INFO L82 PathProgramCache]: Analyzing trace with hash 994068947, now seen corresponding path program 94 times [2021-06-05 15:49:56,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:56,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584173630] [2021-06-05 15:49:56,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:56,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:56,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584173630] [2021-06-05 15:49:56,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584173630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:56,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096931915] [2021-06-05 15:49:56,366 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 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 15:49:56,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:49:56,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:56,393 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:49:56,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:57,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:49:57,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:49:57,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:49:57,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:49:57,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:49:57,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:49:57,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:49:57,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:57,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:49:57,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:57,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:57,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:57,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:49:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:57,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096931915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:57,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:57,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-06-05 15:49:57,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481274298] [2021-06-05 15:49:57,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:49:57,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:57,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:49:57,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:49:57,105 INFO L87 Difference]: Start difference. First operand 2161 states and 4241 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:57,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:57,810 INFO L93 Difference]: Finished difference Result 3990 states and 7983 transitions. [2021-06-05 15:49:57,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:49:57,811 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:49:57,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:57,814 INFO L225 Difference]: With dead ends: 3990 [2021-06-05 15:49:57,814 INFO L226 Difference]: Without dead ends: 3926 [2021-06-05 15:49:57,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 851.5ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:49:57,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-06-05 15:49:57,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 2170. [2021-06-05 15:49:57,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 1.9594283079760257) internal successors, (4250), 2169 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:57,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 4250 transitions. [2021-06-05 15:49:57,833 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 4250 transitions. Word has length 43 [2021-06-05 15:49:57,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:57,833 INFO L482 AbstractCegarLoop]: Abstraction has 2170 states and 4250 transitions. [2021-06-05 15:49:57,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:57,833 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 4250 transitions. [2021-06-05 15:49:57,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:49:57,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:57,834 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:58,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 15:49:58,035 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:58,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:58,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1101093933, now seen corresponding path program 95 times [2021-06-05 15:49:58,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:58,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582898820] [2021-06-05 15:49:58,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:58,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:58,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582898820] [2021-06-05 15:49:58,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582898820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:58,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956216619] [2021-06-05 15:49:58,357 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 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 15:49:58,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:49:58,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:58,385 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 15:49:58,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:59,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:49:59,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:49:59,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:49:59,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:49:59,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:49:59,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:59,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:49:59,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:49:59,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:49:59,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:59,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:59,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:59,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:49:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:59,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956216619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:59,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:59,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-06-05 15:49:59,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828008162] [2021-06-05 15:49:59,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:49:59,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:59,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:49:59,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:49:59,152 INFO L87 Difference]: Start difference. First operand 2170 states and 4250 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:59,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:59,743 INFO L93 Difference]: Finished difference Result 3989 states and 7996 transitions. [2021-06-05 15:49:59,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:49:59,744 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:49:59,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:59,747 INFO L225 Difference]: With dead ends: 3989 [2021-06-05 15:49:59,747 INFO L226 Difference]: Without dead ends: 3711 [2021-06-05 15:49:59,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 874.4ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:49:59,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3711 states. [2021-06-05 15:49:59,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3711 to 2218. [2021-06-05 15:49:59,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 1.958953540820929) internal successors, (4343), 2217 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 15:49:59,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 4343 transitions. [2021-06-05 15:49:59,766 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 4343 transitions. Word has length 43 [2021-06-05 15:49:59,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:59,766 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 4343 transitions. [2021-06-05 15:49:59,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:59,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 4343 transitions. [2021-06-05 15:49:59,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:49:59,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:59,767 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:59,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 15:49:59,968 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:59,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:59,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1208361635, now seen corresponding path program 96 times [2021-06-05 15:49:59,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:59,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863771105] [2021-06-05 15:49:59,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:00,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:00,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863771105] [2021-06-05 15:50:00,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863771105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:00,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203330451] [2021-06-05 15:50:00,296 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 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 15:50:00,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:50:00,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:00,323 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:00,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:00,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:00,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:00,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:00,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:00,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:00,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:00,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:01,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:01,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:01,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:01,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:01,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:01,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:01,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:01,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:01,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:01,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:01,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:01,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:50:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:01,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203330451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:01,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:01,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-06-05 15:50:01,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431857223] [2021-06-05 15:50:01,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:50:01,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:01,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:50:01,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:50:01,019 INFO L87 Difference]: Start difference. First operand 2218 states and 4343 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:01,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:01,816 INFO L93 Difference]: Finished difference Result 3315 states and 6548 transitions. [2021-06-05 15:50:01,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:50:01,817 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:01,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:01,820 INFO L225 Difference]: With dead ends: 3315 [2021-06-05 15:50:01,820 INFO L226 Difference]: Without dead ends: 3300 [2021-06-05 15:50:01,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 832.8ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:50:01,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3300 states. [2021-06-05 15:50:01,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3300 to 2218. [2021-06-05 15:50:01,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 1.958953540820929) internal successors, (4343), 2217 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 15:50:01,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 4343 transitions. [2021-06-05 15:50:01,841 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 4343 transitions. Word has length 43 [2021-06-05 15:50:01,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:01,841 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 4343 transitions. [2021-06-05 15:50:01,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:01,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 4343 transitions. [2021-06-05 15:50:01,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:01,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:01,842 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:02,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:02,043 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:02,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:02,044 INFO L82 PathProgramCache]: Analyzing trace with hash 236561603, now seen corresponding path program 97 times [2021-06-05 15:50:02,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:02,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99835313] [2021-06-05 15:50:02,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:02,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:02,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99835313] [2021-06-05 15:50:02,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99835313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:02,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153971577] [2021-06-05 15:50:02,384 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 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 15:50:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:02,430 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:02,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:03,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:03,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:03,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:03,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:03,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:03,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:03,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:03,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:03,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:03,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:03,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:03,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:50:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:03,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153971577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:03,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:03,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-06-05 15:50:03,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670135457] [2021-06-05 15:50:03,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:50:03,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:03,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:50:03,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:50:03,136 INFO L87 Difference]: Start difference. First operand 2218 states and 4343 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:03,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:03,678 INFO L93 Difference]: Finished difference Result 4305 states and 8580 transitions. [2021-06-05 15:50:03,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:50:03,678 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:03,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:03,682 INFO L225 Difference]: With dead ends: 4305 [2021-06-05 15:50:03,682 INFO L226 Difference]: Without dead ends: 4235 [2021-06-05 15:50:03,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 856.0ms TimeCoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:50:03,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2021-06-05 15:50:03,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 2425. [2021-06-05 15:50:03,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 1.953795379537954) internal successors, (4736), 2424 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:03,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 4736 transitions. [2021-06-05 15:50:03,706 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 4736 transitions. Word has length 43 [2021-06-05 15:50:03,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:03,706 INFO L482 AbstractCegarLoop]: Abstraction has 2425 states and 4736 transitions. [2021-06-05 15:50:03,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:03,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 4736 transitions. [2021-06-05 15:50:03,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:03,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:03,708 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:03,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 15:50:03,908 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:03,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:03,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1240929379, now seen corresponding path program 98 times [2021-06-05 15:50:03,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:03,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082534596] [2021-06-05 15:50:03,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:04,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:04,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082534596] [2021-06-05 15:50:04,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082534596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:04,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624681841] [2021-06-05 15:50:04,203 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 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 15:50:04,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:50:04,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:04,231 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:04,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:04,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:04,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:04,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:04,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:04,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:04,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:04,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:04,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:04,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:04,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:04,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:04,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:50:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:04,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624681841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:04,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:04,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 29 [2021-06-05 15:50:04,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927322805] [2021-06-05 15:50:04,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:50:04,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:04,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:50:04,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:50:04,967 INFO L87 Difference]: Start difference. First operand 2425 states and 4736 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:06,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:06,166 INFO L93 Difference]: Finished difference Result 3888 states and 7643 transitions. [2021-06-05 15:50:06,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:50:06,166 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:06,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:06,169 INFO L225 Difference]: With dead ends: 3888 [2021-06-05 15:50:06,169 INFO L226 Difference]: Without dead ends: 3511 [2021-06-05 15:50:06,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1184.6ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:50:06,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-06-05 15:50:06,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2797. [2021-06-05 15:50:06,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2797 states, 2796 states have (on average 1.9549356223175967) internal successors, (5466), 2796 states have internal predecessors, (5466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:06,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 5466 transitions. [2021-06-05 15:50:06,193 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 5466 transitions. Word has length 43 [2021-06-05 15:50:06,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:06,193 INFO L482 AbstractCegarLoop]: Abstraction has 2797 states and 5466 transitions. [2021-06-05 15:50:06,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:06,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 5466 transitions. [2021-06-05 15:50:06,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:06,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:06,195 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:06,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 15:50:06,395 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:06,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:06,395 INFO L82 PathProgramCache]: Analyzing trace with hash -893728877, now seen corresponding path program 99 times [2021-06-05 15:50:06,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:06,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578251553] [2021-06-05 15:50:06,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:06,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:06,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578251553] [2021-06-05 15:50:06,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578251553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:06,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727168924] [2021-06-05 15:50:06,708 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 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 15:50:06,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:50:06,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:06,736 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:06,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:07,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:07,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:07,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:07,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:07,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:07,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:07,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:07,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:07,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:07,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:07,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:50:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:07,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727168924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:07,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:07,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-06-05 15:50:07,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935607452] [2021-06-05 15:50:07,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:50:07,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:07,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:50:07,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:50:07,495 INFO L87 Difference]: Start difference. First operand 2797 states and 5466 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:08,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:08,576 INFO L93 Difference]: Finished difference Result 4489 states and 9045 transitions. [2021-06-05 15:50:08,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:50:08,577 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:08,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:08,580 INFO L225 Difference]: With dead ends: 4489 [2021-06-05 15:50:08,580 INFO L226 Difference]: Without dead ends: 4335 [2021-06-05 15:50:08,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 878.3ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:50:08,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-06-05 15:50:08,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 2827. [2021-06-05 15:50:08,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2827 states, 2826 states have (on average 1.9554140127388535) internal successors, (5526), 2826 states have internal predecessors, (5526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:08,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 5526 transitions. [2021-06-05 15:50:08,610 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 5526 transitions. Word has length 43 [2021-06-05 15:50:08,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:08,610 INFO L482 AbstractCegarLoop]: Abstraction has 2827 states and 5526 transitions. [2021-06-05 15:50:08,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:08,610 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 5526 transitions. [2021-06-05 15:50:08,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:08,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:08,612 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:08,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 15:50:08,829 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:08,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:08,829 INFO L82 PathProgramCache]: Analyzing trace with hash -946544685, now seen corresponding path program 100 times [2021-06-05 15:50:08,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:08,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009968754] [2021-06-05 15:50:08,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:09,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:09,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009968754] [2021-06-05 15:50:09,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009968754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:09,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368207545] [2021-06-05 15:50:09,234 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 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 15:50:09,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:50:09,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:09,259 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:09,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:09,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:09,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:09,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:09,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:09,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:09,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:09,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:09,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:09,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:09,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:09,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:09,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:50:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:09,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368207545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:09,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:09,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 29 [2021-06-05 15:50:09,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938015734] [2021-06-05 15:50:09,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:50:09,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:09,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:50:09,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:50:09,920 INFO L87 Difference]: Start difference. First operand 2827 states and 5526 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:11,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:11,523 INFO L93 Difference]: Finished difference Result 4129 states and 8090 transitions. [2021-06-05 15:50:11,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:50:11,524 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:11,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:11,527 INFO L225 Difference]: With dead ends: 4129 [2021-06-05 15:50:11,527 INFO L226 Difference]: Without dead ends: 3769 [2021-06-05 15:50:11,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1288.7ms TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:50:11,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3769 states. [2021-06-05 15:50:11,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3769 to 3141. [2021-06-05 15:50:11,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3141 states, 3140 states have (on average 1.9576433121019108) internal successors, (6147), 3140 states have internal predecessors, (6147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3141 states to 3141 states and 6147 transitions. [2021-06-05 15:50:11,555 INFO L78 Accepts]: Start accepts. Automaton has 3141 states and 6147 transitions. Word has length 43 [2021-06-05 15:50:11,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:11,555 INFO L482 AbstractCegarLoop]: Abstraction has 3141 states and 6147 transitions. [2021-06-05 15:50:11,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:11,555 INFO L276 IsEmpty]: Start isEmpty. Operand 3141 states and 6147 transitions. [2021-06-05 15:50:11,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:11,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:11,557 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:11,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:11,758 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:11,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:11,758 INFO L82 PathProgramCache]: Analyzing trace with hash -986040061, now seen corresponding path program 101 times [2021-06-05 15:50:11,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:11,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470165589] [2021-06-05 15:50:11,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:12,051 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:12,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:12,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470165589] [2021-06-05 15:50:12,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470165589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:12,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901473154] [2021-06-05 15:50:12,052 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 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 15:50:12,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:50:12,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:12,094 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 15:50:12,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:12,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:12,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:12,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:12,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:12,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:12,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:12,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:12,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:12,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:12,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:12,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:12,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:50:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:12,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901473154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:12,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:12,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 31 [2021-06-05 15:50:12,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949328729] [2021-06-05 15:50:12,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:50:12,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:12,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:50:12,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:50:12,778 INFO L87 Difference]: Start difference. First operand 3141 states and 6147 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:13,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:13,358 INFO L93 Difference]: Finished difference Result 5700 states and 11356 transitions. [2021-06-05 15:50:13,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:50:13,359 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:13,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:13,363 INFO L225 Difference]: With dead ends: 5700 [2021-06-05 15:50:13,363 INFO L226 Difference]: Without dead ends: 5434 [2021-06-05 15:50:13,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 806.0ms TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:50:13,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5434 states. [2021-06-05 15:50:13,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5434 to 3258. [2021-06-05 15:50:13,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3258 states, 3257 states have (on average 1.9610070617132331) internal successors, (6387), 3257 states have internal predecessors, (6387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:13,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3258 states to 3258 states and 6387 transitions. [2021-06-05 15:50:13,397 INFO L78 Accepts]: Start accepts. Automaton has 3258 states and 6387 transitions. Word has length 43 [2021-06-05 15:50:13,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:13,397 INFO L482 AbstractCegarLoop]: Abstraction has 3258 states and 6387 transitions. [2021-06-05 15:50:13,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:13,398 INFO L276 IsEmpty]: Start isEmpty. Operand 3258 states and 6387 transitions. [2021-06-05 15:50:13,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:13,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:13,399 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:13,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 15:50:13,600 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:13,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:13,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1213764355, now seen corresponding path program 102 times [2021-06-05 15:50:13,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:13,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266758003] [2021-06-05 15:50:13,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:13,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:13,938 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:13,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:13,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266758003] [2021-06-05 15:50:13,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266758003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:13,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175795963] [2021-06-05 15:50:13,938 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 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 15:50:13,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:50:13,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:13,967 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 15:50:13,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:14,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:14,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:14,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:14,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:14,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:14,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:14,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:14,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:14,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:14,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:14,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:14,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:50:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:14,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175795963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:14,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:14,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-06-05 15:50:14,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784325129] [2021-06-05 15:50:14,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:50:14,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:14,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:50:14,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:50:14,692 INFO L87 Difference]: Start difference. First operand 3258 states and 6387 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:14,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:14,995 INFO L93 Difference]: Finished difference Result 4967 states and 9920 transitions. [2021-06-05 15:50:14,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:50:14,995 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:14,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:14,999 INFO L225 Difference]: With dead ends: 4967 [2021-06-05 15:50:14,999 INFO L226 Difference]: Without dead ends: 4691 [2021-06-05 15:50:15,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 858.3ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:50:15,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2021-06-05 15:50:15,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 3321. [2021-06-05 15:50:15,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3321 states, 3320 states have (on average 1.9623493975903614) internal successors, (6515), 3320 states have internal predecessors, (6515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:15,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3321 states to 3321 states and 6515 transitions. [2021-06-05 15:50:15,034 INFO L78 Accepts]: Start accepts. Automaton has 3321 states and 6515 transitions. Word has length 43 [2021-06-05 15:50:15,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:15,034 INFO L482 AbstractCegarLoop]: Abstraction has 3321 states and 6515 transitions. [2021-06-05 15:50:15,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:15,034 INFO L276 IsEmpty]: Start isEmpty. Operand 3321 states and 6515 transitions. [2021-06-05 15:50:15,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:15,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:15,036 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:15,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 15:50:15,237 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:15,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:15,237 INFO L82 PathProgramCache]: Analyzing trace with hash -771747373, now seen corresponding path program 103 times [2021-06-05 15:50:15,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:15,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896214975] [2021-06-05 15:50:15,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:15,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:15,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896214975] [2021-06-05 15:50:15,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896214975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:15,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968480665] [2021-06-05 15:50:15,621 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 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 15:50:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:15,672 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:15,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:16,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:16,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:16,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:16,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:16,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:16,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:16,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:16,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:16,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:16,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:16,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:16,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:50:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:16,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968480665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:16,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:16,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-06-05 15:50:16,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119613055] [2021-06-05 15:50:16,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:50:16,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:16,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:50:16,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:50:16,425 INFO L87 Difference]: Start difference. First operand 3321 states and 6515 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:16,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:16,903 INFO L93 Difference]: Finished difference Result 4281 states and 8456 transitions. [2021-06-05 15:50:16,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:50:16,903 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:16,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:16,907 INFO L225 Difference]: With dead ends: 4281 [2021-06-05 15:50:16,908 INFO L226 Difference]: Without dead ends: 4266 [2021-06-05 15:50:16,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 878.7ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:50:16,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4266 states. [2021-06-05 15:50:16,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4266 to 3321. [2021-06-05 15:50:16,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3321 states, 3320 states have (on average 1.9623493975903614) internal successors, (6515), 3320 states have internal predecessors, (6515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:16,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3321 states to 3321 states and 6515 transitions. [2021-06-05 15:50:16,940 INFO L78 Accepts]: Start accepts. Automaton has 3321 states and 6515 transitions. Word has length 43 [2021-06-05 15:50:16,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:16,940 INFO L482 AbstractCegarLoop]: Abstraction has 3321 states and 6515 transitions. [2021-06-05 15:50:16,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:16,940 INFO L276 IsEmpty]: Start isEmpty. Operand 3321 states and 6515 transitions. [2021-06-05 15:50:16,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:16,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:16,942 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:17,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:17,157 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:17,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:17,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1004072413, now seen corresponding path program 104 times [2021-06-05 15:50:17,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:17,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262469521] [2021-06-05 15:50:17,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:17,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:17,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262469521] [2021-06-05 15:50:17,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262469521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:17,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518036175] [2021-06-05 15:50:17,511 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 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 15:50:17,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:50:17,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:17,539 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:17,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:18,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:18,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:18,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:18,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:18,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:18,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:18,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:18,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:18,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:18,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:18,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:50:18,200 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:18,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518036175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:18,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:18,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-06-05 15:50:18,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141819869] [2021-06-05 15:50:18,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:50:18,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:18,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:50:18,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:50:18,200 INFO L87 Difference]: Start difference. First operand 3321 states and 6515 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:18,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:18,624 INFO L93 Difference]: Finished difference Result 6029 states and 12136 transitions. [2021-06-05 15:50:18,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:50:18,624 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:18,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:18,630 INFO L225 Difference]: With dead ends: 6029 [2021-06-05 15:50:18,630 INFO L226 Difference]: Without dead ends: 5816 [2021-06-05 15:50:18,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 808.7ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:50:18,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5816 states. [2021-06-05 15:50:18,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5816 to 3424. [2021-06-05 15:50:18,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 3423 states have (on average 1.964943032427695) internal successors, (6726), 3423 states have internal predecessors, (6726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:18,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 6726 transitions. [2021-06-05 15:50:18,696 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 6726 transitions. Word has length 43 [2021-06-05 15:50:18,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:18,696 INFO L482 AbstractCegarLoop]: Abstraction has 3424 states and 6726 transitions. [2021-06-05 15:50:18,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:18,696 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 6726 transitions. [2021-06-05 15:50:18,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:18,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:18,698 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:18,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:18,911 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:18,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:18,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1103420819, now seen corresponding path program 105 times [2021-06-05 15:50:18,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:18,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461542619] [2021-06-05 15:50:18,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:19,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:19,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461542619] [2021-06-05 15:50:19,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461542619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:19,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900748705] [2021-06-05 15:50:19,240 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 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 15:50:19,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:50:19,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:19,269 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:19,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:19,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:19,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:19,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:19,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:19,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:19,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:19,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:19,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:19,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:19,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:19,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:50:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:19,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900748705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:19,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:19,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-06-05 15:50:19,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416883165] [2021-06-05 15:50:19,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:50:19,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:19,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:50:19,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:50:19,940 INFO L87 Difference]: Start difference. First operand 3424 states and 6726 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:20,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:20,666 INFO L93 Difference]: Finished difference Result 5238 states and 10412 transitions. [2021-06-05 15:50:20,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:50:20,667 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:20,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:20,671 INFO L225 Difference]: With dead ends: 5238 [2021-06-05 15:50:20,671 INFO L226 Difference]: Without dead ends: 5180 [2021-06-05 15:50:20,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 797.8ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:50:20,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5180 states. [2021-06-05 15:50:20,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5180 to 3451. [2021-06-05 15:50:20,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3451 states, 3450 states have (on average 1.9663768115942029) internal successors, (6784), 3450 states have internal predecessors, (6784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3451 states to 3451 states and 6784 transitions. [2021-06-05 15:50:20,703 INFO L78 Accepts]: Start accepts. Automaton has 3451 states and 6784 transitions. Word has length 43 [2021-06-05 15:50:20,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:20,703 INFO L482 AbstractCegarLoop]: Abstraction has 3451 states and 6784 transitions. [2021-06-05 15:50:20,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:20,703 INFO L276 IsEmpty]: Start isEmpty. Operand 3451 states and 6784 transitions. [2021-06-05 15:50:20,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:20,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:20,705 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:20,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:20,921 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:20,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:20,921 INFO L82 PathProgramCache]: Analyzing trace with hash -882090909, now seen corresponding path program 106 times [2021-06-05 15:50:20,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:20,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061836758] [2021-06-05 15:50:20,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:21,241 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:21,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:21,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061836758] [2021-06-05 15:50:21,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061836758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:21,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675440484] [2021-06-05 15:50:21,241 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 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 15:50:21,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:50:21,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:21,268 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:21,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:21,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:21,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:21,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:21,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:21,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:21,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:21,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:21,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:21,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:21,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:21,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:50:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:21,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675440484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:21,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:21,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-06-05 15:50:21,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065548415] [2021-06-05 15:50:21,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:50:21,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:21,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:50:21,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:50:21,954 INFO L87 Difference]: Start difference. First operand 3451 states and 6784 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:22,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:22,594 INFO L93 Difference]: Finished difference Result 4745 states and 9374 transitions. [2021-06-05 15:50:22,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:50:22,594 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:22,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:22,598 INFO L225 Difference]: With dead ends: 4745 [2021-06-05 15:50:22,598 INFO L226 Difference]: Without dead ends: 4730 [2021-06-05 15:50:22,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 819.3ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:50:22,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4730 states. [2021-06-05 15:50:22,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4730 to 3451. [2021-06-05 15:50:22,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3451 states, 3450 states have (on average 1.9663768115942029) internal successors, (6784), 3450 states have internal predecessors, (6784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:22,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3451 states to 3451 states and 6784 transitions. [2021-06-05 15:50:22,652 INFO L78 Accepts]: Start accepts. Automaton has 3451 states and 6784 transitions. Word has length 43 [2021-06-05 15:50:22,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:22,652 INFO L482 AbstractCegarLoop]: Abstraction has 3451 states and 6784 transitions. [2021-06-05 15:50:22,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:22,652 INFO L276 IsEmpty]: Start isEmpty. Operand 3451 states and 6784 transitions. [2021-06-05 15:50:22,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:22,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:22,654 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:22,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:22,873 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:22,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:22,873 INFO L82 PathProgramCache]: Analyzing trace with hash 204094867, now seen corresponding path program 107 times [2021-06-05 15:50:22,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:22,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181840473] [2021-06-05 15:50:22,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:22,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:23,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:23,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181840473] [2021-06-05 15:50:23,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181840473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:23,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902842951] [2021-06-05 15:50:23,167 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 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 15:50:23,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:50:23,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:23,194 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:23,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:23,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:23,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:23,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:23,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:23,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:23,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:23,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:23,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:23,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:23,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:50:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:23,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902842951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:23,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:23,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 27 [2021-06-05 15:50:23,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75266058] [2021-06-05 15:50:23,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:50:23,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:23,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:50:23,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:50:23,803 INFO L87 Difference]: Start difference. First operand 3451 states and 6784 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:24,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:24,328 INFO L93 Difference]: Finished difference Result 5475 states and 10796 transitions. [2021-06-05 15:50:24,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:50:24,328 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:24,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:24,333 INFO L225 Difference]: With dead ends: 5475 [2021-06-05 15:50:24,333 INFO L226 Difference]: Without dead ends: 5191 [2021-06-05 15:50:24,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 701.4ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:50:24,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5191 states. [2021-06-05 15:50:24,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5191 to 3671. [2021-06-05 15:50:24,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3670 states have (on average 1.9724795640326975) internal successors, (7239), 3670 states have internal predecessors, (7239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:24,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 7239 transitions. [2021-06-05 15:50:24,372 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 7239 transitions. Word has length 43 [2021-06-05 15:50:24,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:24,372 INFO L482 AbstractCegarLoop]: Abstraction has 3671 states and 7239 transitions. [2021-06-05 15:50:24,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:24,373 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 7239 transitions. [2021-06-05 15:50:24,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:24,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:24,375 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:24,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 15:50:24,593 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:24,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:24,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1930563389, now seen corresponding path program 108 times [2021-06-05 15:50:24,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:24,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657454439] [2021-06-05 15:50:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:24,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:24,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657454439] [2021-06-05 15:50:24,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657454439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:24,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569623012] [2021-06-05 15:50:24,922 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 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 15:50:24,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:50:24,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:24,950 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:24,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:25,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:25,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:25,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:25,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:25,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:25,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:25,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:25,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:25,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:25,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:50:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:25,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569623012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:25,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:25,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-06-05 15:50:25,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091823910] [2021-06-05 15:50:25,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:50:25,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:25,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:50:25,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:50:25,607 INFO L87 Difference]: Start difference. First operand 3671 states and 7239 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:25,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:25,891 INFO L93 Difference]: Finished difference Result 5940 states and 12046 transitions. [2021-06-05 15:50:25,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:50:25,892 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:25,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:25,896 INFO L225 Difference]: With dead ends: 5940 [2021-06-05 15:50:25,896 INFO L226 Difference]: Without dead ends: 5733 [2021-06-05 15:50:25,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 815.5ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:50:25,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5733 states. [2021-06-05 15:50:25,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5733 to 3683. [2021-06-05 15:50:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3683 states, 3682 states have (on average 1.9731124388919066) internal successors, (7265), 3682 states have internal predecessors, (7265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:25,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3683 states to 3683 states and 7265 transitions. [2021-06-05 15:50:25,937 INFO L78 Accepts]: Start accepts. Automaton has 3683 states and 7265 transitions. Word has length 43 [2021-06-05 15:50:25,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:25,937 INFO L482 AbstractCegarLoop]: Abstraction has 3683 states and 7265 transitions. [2021-06-05 15:50:25,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:25,937 INFO L276 IsEmpty]: Start isEmpty. Operand 3683 states and 7265 transitions. [2021-06-05 15:50:25,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:25,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:25,941 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:26,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 15:50:26,153 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:26,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:26,153 INFO L82 PathProgramCache]: Analyzing trace with hash 378892179, now seen corresponding path program 109 times [2021-06-05 15:50:26,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:26,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741740394] [2021-06-05 15:50:26,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:26,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:26,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741740394] [2021-06-05 15:50:26,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741740394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:26,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635729795] [2021-06-05 15:50:26,507 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 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 15:50:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:26,558 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:26,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:27,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:27,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:27,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:27,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:27,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:27,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:27,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:27,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:27,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:27,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:50:27,241 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:27,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635729795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:27,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:27,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-06-05 15:50:27,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948126302] [2021-06-05 15:50:27,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:50:27,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:27,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:50:27,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:50:27,242 INFO L87 Difference]: Start difference. First operand 3683 states and 7265 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:27,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:27,812 INFO L93 Difference]: Finished difference Result 4821 states and 9570 transitions. [2021-06-05 15:50:27,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:50:27,813 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:27,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:27,817 INFO L225 Difference]: With dead ends: 4821 [2021-06-05 15:50:27,817 INFO L226 Difference]: Without dead ends: 4806 [2021-06-05 15:50:27,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 860.0ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:50:27,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4806 states. [2021-06-05 15:50:27,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4806 to 3686. [2021-06-05 15:50:27,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3686 states, 3685 states have (on average 1.973134328358209) internal successors, (7271), 3685 states have internal predecessors, (7271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:27,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3686 states to 3686 states and 7271 transitions. [2021-06-05 15:50:27,859 INFO L78 Accepts]: Start accepts. Automaton has 3686 states and 7271 transitions. Word has length 43 [2021-06-05 15:50:27,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:27,859 INFO L482 AbstractCegarLoop]: Abstraction has 3686 states and 7271 transitions. [2021-06-05 15:50:27,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:27,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3686 states and 7271 transitions. [2021-06-05 15:50:27,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:27,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:27,862 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:28,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 15:50:28,078 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:28,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:28,078 INFO L82 PathProgramCache]: Analyzing trace with hash 2138105379, now seen corresponding path program 110 times [2021-06-05 15:50:28,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:28,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566811969] [2021-06-05 15:50:28,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:28,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:28,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566811969] [2021-06-05 15:50:28,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566811969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:28,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729221401] [2021-06-05 15:50:28,433 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 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 15:50:28,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:50:28,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:28,474 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:28,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:29,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:29,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:29,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:29,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:29,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 28 disjoint index pairs (out of 55 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:29,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:29,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:29,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:29,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:50:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:29,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729221401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:29,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:29,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2021-06-05 15:50:29,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891694094] [2021-06-05 15:50:29,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:50:29,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:29,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:50:29,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:50:29,110 INFO L87 Difference]: Start difference. First operand 3686 states and 7271 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:29,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:29,728 INFO L93 Difference]: Finished difference Result 5294 states and 10543 transitions. [2021-06-05 15:50:29,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:50:29,729 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:29,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:29,733 INFO L225 Difference]: With dead ends: 5294 [2021-06-05 15:50:29,733 INFO L226 Difference]: Without dead ends: 5264 [2021-06-05 15:50:29,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 816.5ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:50:29,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5264 states. [2021-06-05 15:50:29,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5264 to 3722. [2021-06-05 15:50:29,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3722 states, 3721 states have (on average 1.97420048374093) internal successors, (7346), 3721 states have internal predecessors, (7346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:29,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 7346 transitions. [2021-06-05 15:50:29,767 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 7346 transitions. Word has length 43 [2021-06-05 15:50:29,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:29,767 INFO L482 AbstractCegarLoop]: Abstraction has 3722 states and 7346 transitions. [2021-06-05 15:50:29,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:29,767 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 7346 transitions. [2021-06-05 15:50:29,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:29,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:29,769 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:29,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:29,970 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:29,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:29,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1246050477, now seen corresponding path program 111 times [2021-06-05 15:50:29,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:29,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172844010] [2021-06-05 15:50:29,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:30,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:30,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172844010] [2021-06-05 15:50:30,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172844010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:30,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600582577] [2021-06-05 15:50:30,335 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 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 15:50:30,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:50:30,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:30,363 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:30,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:31,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:31,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:31,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:31,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:31,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:31,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:31,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:31,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 55 [2021-06-05 15:50:31,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:31,213 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 15:50:31,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:31,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:163, output treesize:7 [2021-06-05 15:50:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:31,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600582577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:31,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:31,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-06-05 15:50:31,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596928101] [2021-06-05 15:50:31,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:50:31,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:31,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:50:31,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:50:31,222 INFO L87 Difference]: Start difference. First operand 3722 states and 7346 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:33,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:33,464 INFO L93 Difference]: Finished difference Result 5592 states and 11061 transitions. [2021-06-05 15:50:33,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:50:33,465 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:33,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:33,469 INFO L225 Difference]: With dead ends: 5592 [2021-06-05 15:50:33,470 INFO L226 Difference]: Without dead ends: 5209 [2021-06-05 15:50:33,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2342.6ms TimeCoverageRelationStatistics Valid=248, Invalid=2508, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:50:33,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5209 states. [2021-06-05 15:50:33,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5209 to 4162. [2021-06-05 15:50:33,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4162 states, 4161 states have (on average 1.9699591444364335) internal successors, (8197), 4161 states have internal predecessors, (8197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:33,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4162 states to 4162 states and 8197 transitions. [2021-06-05 15:50:33,508 INFO L78 Accepts]: Start accepts. Automaton has 4162 states and 8197 transitions. Word has length 43 [2021-06-05 15:50:33,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:33,508 INFO L482 AbstractCegarLoop]: Abstraction has 4162 states and 8197 transitions. [2021-06-05 15:50:33,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:33,509 INFO L276 IsEmpty]: Start isEmpty. Operand 4162 states and 8197 transitions. [2021-06-05 15:50:33,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:33,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:33,511 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:33,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 15:50:33,713 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:33,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:33,713 INFO L82 PathProgramCache]: Analyzing trace with hash 214609235, now seen corresponding path program 112 times [2021-06-05 15:50:33,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:33,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355617661] [2021-06-05 15:50:33,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:33,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:33,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355617661] [2021-06-05 15:50:33,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355617661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:33,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374834912] [2021-06-05 15:50:33,993 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 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 15:50:34,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:50:34,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:34,019 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:34,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:34,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:34,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:34,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:34,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:34,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:34,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:34,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:34,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:50:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:34,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374834912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:34,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:34,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 26 [2021-06-05 15:50:34,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338121811] [2021-06-05 15:50:34,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:50:34,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:34,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:50:34,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:50:34,527 INFO L87 Difference]: Start difference. First operand 4162 states and 8197 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:35,825 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2021-06-05 15:50:35,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:35,858 INFO L93 Difference]: Finished difference Result 7069 states and 14124 transitions. [2021-06-05 15:50:35,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:50:35,859 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:35,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:35,864 INFO L225 Difference]: With dead ends: 7069 [2021-06-05 15:50:35,864 INFO L226 Difference]: Without dead ends: 6666 [2021-06-05 15:50:35,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1509.5ms TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:50:35,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6666 states. [2021-06-05 15:50:35,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6666 to 4415. [2021-06-05 15:50:35,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4415 states, 4414 states have (on average 1.9725872224739465) internal successors, (8707), 4414 states have internal predecessors, (8707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:35,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4415 states to 4415 states and 8707 transitions. [2021-06-05 15:50:35,913 INFO L78 Accepts]: Start accepts. Automaton has 4415 states and 8707 transitions. Word has length 43 [2021-06-05 15:50:35,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:35,913 INFO L482 AbstractCegarLoop]: Abstraction has 4415 states and 8707 transitions. [2021-06-05 15:50:35,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:35,913 INFO L276 IsEmpty]: Start isEmpty. Operand 4415 states and 8707 transitions. [2021-06-05 15:50:35,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:35,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:35,916 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:36,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:36,132 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:36,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:36,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1068380643, now seen corresponding path program 113 times [2021-06-05 15:50:36,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:36,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990218865] [2021-06-05 15:50:36,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:50:36,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:36,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990218865] [2021-06-05 15:50:36,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990218865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:36,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667975089] [2021-06-05 15:50:36,409 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 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 15:50:36,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:50:36,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:36,439 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:36,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:37,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:37,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:37,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:37,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:37,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:37,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:37,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:37,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:37,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:37,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 44 [2021-06-05 15:50:37,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:37,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:37,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:37,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:112, output treesize:3 [2021-06-05 15:50:37,160 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:37,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667975089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:37,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:37,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 32 [2021-06-05 15:50:37,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181817312] [2021-06-05 15:50:37,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:50:37,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:37,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:50:37,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:50:37,160 INFO L87 Difference]: Start difference. First operand 4415 states and 8707 transitions. Second operand has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:38,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:38,717 INFO L93 Difference]: Finished difference Result 5648 states and 11150 transitions. [2021-06-05 15:50:38,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:50:38,717 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:38,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:38,722 INFO L225 Difference]: With dead ends: 5648 [2021-06-05 15:50:38,722 INFO L226 Difference]: Without dead ends: 5539 [2021-06-05 15:50:38,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1641.0ms TimeCoverageRelationStatistics Valid=201, Invalid=1961, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:50:38,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5539 states. [2021-06-05 15:50:38,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5539 to 4486. [2021-06-05 15:50:38,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4486 states, 4485 states have (on average 1.9745819397993312) internal successors, (8856), 4485 states have internal predecessors, (8856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:38,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4486 states to 4486 states and 8856 transitions. [2021-06-05 15:50:38,761 INFO L78 Accepts]: Start accepts. Automaton has 4486 states and 8856 transitions. Word has length 43 [2021-06-05 15:50:38,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:38,761 INFO L482 AbstractCegarLoop]: Abstraction has 4486 states and 8856 transitions. [2021-06-05 15:50:38,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:38,761 INFO L276 IsEmpty]: Start isEmpty. Operand 4486 states and 8856 transitions. [2021-06-05 15:50:38,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:38,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:38,764 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:38,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 15:50:38,965 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:38,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:38,965 INFO L82 PathProgramCache]: Analyzing trace with hash -198698669, now seen corresponding path program 114 times [2021-06-05 15:50:38,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:38,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034469086] [2021-06-05 15:50:38,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:39,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:39,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034469086] [2021-06-05 15:50:39,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034469086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:39,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120310117] [2021-06-05 15:50:39,236 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 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 15:50:39,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:50:39,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:39,264 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:39,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:39,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:39,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:39,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:39,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:39,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:39,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:39,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:39,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:50:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:39,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120310117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:39,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:39,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 25 [2021-06-05 15:50:39,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756054149] [2021-06-05 15:50:39,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:50:39,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:39,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:50:39,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:50:39,812 INFO L87 Difference]: Start difference. First operand 4486 states and 8856 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:40,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:40,215 INFO L93 Difference]: Finished difference Result 6505 states and 12851 transitions. [2021-06-05 15:50:40,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:50:40,216 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:40,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:40,221 INFO L225 Difference]: With dead ends: 6505 [2021-06-05 15:50:40,221 INFO L226 Difference]: Without dead ends: 6237 [2021-06-05 15:50:40,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 665.8ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:50:40,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6237 states. [2021-06-05 15:50:40,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6237 to 4662. [2021-06-05 15:50:40,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4662 states, 4661 states have (on average 1.977043552885647) internal successors, (9215), 4661 states have internal predecessors, (9215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:40,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4662 states to 4662 states and 9215 transitions. [2021-06-05 15:50:40,263 INFO L78 Accepts]: Start accepts. Automaton has 4662 states and 9215 transitions. Word has length 43 [2021-06-05 15:50:40,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:40,263 INFO L482 AbstractCegarLoop]: Abstraction has 4662 states and 9215 transitions. [2021-06-05 15:50:40,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:40,264 INFO L276 IsEmpty]: Start isEmpty. Operand 4662 states and 9215 transitions. [2021-06-05 15:50:40,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:40,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:40,266 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:40,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:40,467 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:40,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:40,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1284041555, now seen corresponding path program 115 times [2021-06-05 15:50:40,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:40,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424791679] [2021-06-05 15:50:40,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:40,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:40,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424791679] [2021-06-05 15:50:40,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424791679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:40,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138410651] [2021-06-05 15:50:40,745 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 15:50:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:40,781 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:40,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:41,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:41,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:41,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:41,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:41,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:41,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:41,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:41,292 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:50:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:41,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138410651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:41,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:41,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 25 [2021-06-05 15:50:41,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894171308] [2021-06-05 15:50:41,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:50:41,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:41,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:50:41,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:50:41,300 INFO L87 Difference]: Start difference. First operand 4662 states and 9215 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:41,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:41,670 INFO L93 Difference]: Finished difference Result 6935 states and 13838 transitions. [2021-06-05 15:50:41,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:50:41,671 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:41,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:41,676 INFO L225 Difference]: With dead ends: 6935 [2021-06-05 15:50:41,677 INFO L226 Difference]: Without dead ends: 6690 [2021-06-05 15:50:41,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 650.5ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:50:41,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6690 states. [2021-06-05 15:50:41,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6690 to 5133. [2021-06-05 15:50:41,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5133 states, 5132 states have (on average 1.9912314886983633) internal successors, (10219), 5132 states have internal predecessors, (10219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:41,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5133 states to 5133 states and 10219 transitions. [2021-06-05 15:50:41,727 INFO L78 Accepts]: Start accepts. Automaton has 5133 states and 10219 transitions. Word has length 43 [2021-06-05 15:50:41,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:41,727 INFO L482 AbstractCegarLoop]: Abstraction has 5133 states and 10219 transitions. [2021-06-05 15:50:41,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:41,727 INFO L276 IsEmpty]: Start isEmpty. Operand 5133 states and 10219 transitions. [2021-06-05 15:50:41,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:41,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:41,730 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:41,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:41,931 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:41,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:41,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1550266029, now seen corresponding path program 116 times [2021-06-05 15:50:41,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:41,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57527353] [2021-06-05 15:50:41,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:42,211 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:42,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:42,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57527353] [2021-06-05 15:50:42,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57527353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:42,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751992555] [2021-06-05 15:50:42,211 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 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 15:50:42,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:50:42,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:42,237 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:42,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:42,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:42,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:42,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:42,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:42,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:42,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:42,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:42,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:50:42,753 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:42,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751992555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:42,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:42,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 26 [2021-06-05 15:50:42,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083155806] [2021-06-05 15:50:42,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:50:42,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:42,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:50:42,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:50:42,754 INFO L87 Difference]: Start difference. First operand 5133 states and 10219 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:43,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:43,461 INFO L93 Difference]: Finished difference Result 7659 states and 15381 transitions. [2021-06-05 15:50:43,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:50:43,462 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:43,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:43,468 INFO L225 Difference]: With dead ends: 7659 [2021-06-05 15:50:43,468 INFO L226 Difference]: Without dead ends: 7594 [2021-06-05 15:50:43,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 648.3ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:50:43,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7594 states. [2021-06-05 15:50:43,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7594 to 4965. [2021-06-05 15:50:43,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4965 states, 4964 states have (on average 1.984488315874295) internal successors, (9851), 4964 states have internal predecessors, (9851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:43,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4965 states to 4965 states and 9851 transitions. [2021-06-05 15:50:43,516 INFO L78 Accepts]: Start accepts. Automaton has 4965 states and 9851 transitions. Word has length 43 [2021-06-05 15:50:43,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:43,516 INFO L482 AbstractCegarLoop]: Abstraction has 4965 states and 9851 transitions. [2021-06-05 15:50:43,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:43,516 INFO L276 IsEmpty]: Start isEmpty. Operand 4965 states and 9851 transitions. [2021-06-05 15:50:43,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:43,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:43,519 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:43,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-06-05 15:50:43,720 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:43,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:43,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1458838867, now seen corresponding path program 117 times [2021-06-05 15:50:43,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:43,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332791314] [2021-06-05 15:50:43,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:44,047 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:44,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:44,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332791314] [2021-06-05 15:50:44,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332791314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:44,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864511114] [2021-06-05 15:50:44,047 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 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 15:50:44,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:50:44,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:44,075 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:44,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:44,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:44,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:44,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:44,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:44,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:44,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:44,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:50:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:44,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864511114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:44,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:44,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-06-05 15:50:44,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871311772] [2021-06-05 15:50:44,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:50:44,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:44,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:50:44,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:50:44,631 INFO L87 Difference]: Start difference. First operand 4965 states and 9851 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:45,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:45,021 INFO L93 Difference]: Finished difference Result 6720 states and 13442 transitions. [2021-06-05 15:50:45,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:50:45,021 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:45,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:45,027 INFO L225 Difference]: With dead ends: 6720 [2021-06-05 15:50:45,027 INFO L226 Difference]: Without dead ends: 6615 [2021-06-05 15:50:45,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 720.9ms TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:50:45,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6615 states. [2021-06-05 15:50:45,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6615 to 4980. [2021-06-05 15:50:45,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4980 states, 4979 states have (on average 1.9847358907411126) internal successors, (9882), 4979 states have internal predecessors, (9882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:45,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4980 states to 4980 states and 9882 transitions. [2021-06-05 15:50:45,071 INFO L78 Accepts]: Start accepts. Automaton has 4980 states and 9882 transitions. Word has length 43 [2021-06-05 15:50:45,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:45,071 INFO L482 AbstractCegarLoop]: Abstraction has 4980 states and 9882 transitions. [2021-06-05 15:50:45,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:45,071 INFO L276 IsEmpty]: Start isEmpty. Operand 4980 states and 9882 transitions. [2021-06-05 15:50:45,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:45,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:45,074 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:45,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 15:50:45,274 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:45,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:45,274 INFO L82 PathProgramCache]: Analyzing trace with hash -2103144989, now seen corresponding path program 118 times [2021-06-05 15:50:45,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:45,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984821395] [2021-06-05 15:50:45,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:45,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:45,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984821395] [2021-06-05 15:50:45,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984821395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:45,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267360636] [2021-06-05 15:50:45,542 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 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 15:50:45,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:50:45,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:45,572 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:45,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:46,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:46,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:46,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:46,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:46,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:46,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:46,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:50:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:46,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267360636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:46,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:46,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 24 [2021-06-05 15:50:46,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712427177] [2021-06-05 15:50:46,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:50:46,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:46,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:50:46,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:50:46,051 INFO L87 Difference]: Start difference. First operand 4980 states and 9882 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:46,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:46,323 INFO L93 Difference]: Finished difference Result 6288 states and 12461 transitions. [2021-06-05 15:50:46,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:50:46,324 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:46,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:46,329 INFO L225 Difference]: With dead ends: 6288 [2021-06-05 15:50:46,329 INFO L226 Difference]: Without dead ends: 6061 [2021-06-05 15:50:46,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 603.1ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:50:46,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-06-05 15:50:46,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 5116. [2021-06-05 15:50:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5116 states, 5115 states have (on average 1.9896383186705768) internal successors, (10177), 5115 states have internal predecessors, (10177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:46,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5116 states to 5116 states and 10177 transitions. [2021-06-05 15:50:46,382 INFO L78 Accepts]: Start accepts. Automaton has 5116 states and 10177 transitions. Word has length 43 [2021-06-05 15:50:46,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:46,382 INFO L482 AbstractCegarLoop]: Abstraction has 5116 states and 10177 transitions. [2021-06-05 15:50:46,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:46,383 INFO L276 IsEmpty]: Start isEmpty. Operand 5116 states and 10177 transitions. [2021-06-05 15:50:46,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:46,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:46,385 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:46,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:46,586 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:46,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:46,586 INFO L82 PathProgramCache]: Analyzing trace with hash -642485277, now seen corresponding path program 119 times [2021-06-05 15:50:46,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:46,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521787159] [2021-06-05 15:50:46,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:46,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:46,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521787159] [2021-06-05 15:50:46,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521787159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:46,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066256638] [2021-06-05 15:50:46,870 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 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 15:50:46,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:50:46,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:46,898 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:46,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:47,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:47,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:47,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:47,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:47,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:47,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:47,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:50:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:47,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066256638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:47,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:47,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 25 [2021-06-05 15:50:47,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067165164] [2021-06-05 15:50:47,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:50:47,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:47,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:50:47,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:50:47,436 INFO L87 Difference]: Start difference. First operand 5116 states and 10177 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:47,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:47,728 INFO L93 Difference]: Finished difference Result 6874 states and 13706 transitions. [2021-06-05 15:50:47,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:50:47,728 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:47,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:47,734 INFO L225 Difference]: With dead ends: 6874 [2021-06-05 15:50:47,734 INFO L226 Difference]: Without dead ends: 6829 [2021-06-05 15:50:47,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 667.3ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:50:47,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6829 states. [2021-06-05 15:50:47,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6829 to 5057. [2021-06-05 15:50:47,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5057 states, 5056 states have (on average 1.987737341772152) internal successors, (10050), 5056 states have internal predecessors, (10050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:47,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5057 states to 5057 states and 10050 transitions. [2021-06-05 15:50:47,779 INFO L78 Accepts]: Start accepts. Automaton has 5057 states and 10050 transitions. Word has length 43 [2021-06-05 15:50:47,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:47,779 INFO L482 AbstractCegarLoop]: Abstraction has 5057 states and 10050 transitions. [2021-06-05 15:50:47,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:47,780 INFO L276 IsEmpty]: Start isEmpty. Operand 5057 states and 10050 transitions. [2021-06-05 15:50:47,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:47,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:47,783 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:47,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 15:50:47,983 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:47,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:47,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1402807837, now seen corresponding path program 120 times [2021-06-05 15:50:47,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:47,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725921373] [2021-06-05 15:50:47,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:48,308 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:48,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:48,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725921373] [2021-06-05 15:50:48,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725921373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:48,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276720671] [2021-06-05 15:50:48,308 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 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 15:50:48,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:50:48,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:48,338 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 15:50:48,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:49,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:49,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:49,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:49,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:49,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:49,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:49,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 55 [2021-06-05 15:50:49,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:49,287 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 15:50:49,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:49,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:159, output treesize:7 [2021-06-05 15:50:49,296 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:49,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276720671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:49,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:49,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 26 [2021-06-05 15:50:49,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568494356] [2021-06-05 15:50:49,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:50:49,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:49,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:50:49,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:50:49,297 INFO L87 Difference]: Start difference. First operand 5057 states and 10050 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:54,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:54,522 INFO L93 Difference]: Finished difference Result 7825 states and 15639 transitions. [2021-06-05 15:50:54,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:50:54,523 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:54,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:54,529 INFO L225 Difference]: With dead ends: 7825 [2021-06-05 15:50:54,529 INFO L226 Difference]: Without dead ends: 7519 [2021-06-05 15:50:54,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 3454.6ms TimeCoverageRelationStatistics Valid=210, Invalid=1860, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:50:54,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7519 states. [2021-06-05 15:50:54,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7519 to 5176. [2021-06-05 15:50:54,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5176 states, 5175 states have (on average 1.991304347826087) internal successors, (10305), 5175 states have internal predecessors, (10305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:54,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5176 states to 5176 states and 10305 transitions. [2021-06-05 15:50:54,579 INFO L78 Accepts]: Start accepts. Automaton has 5176 states and 10305 transitions. Word has length 43 [2021-06-05 15:50:54,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:54,579 INFO L482 AbstractCegarLoop]: Abstraction has 5176 states and 10305 transitions. [2021-06-05 15:50:54,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:54,579 INFO L276 IsEmpty]: Start isEmpty. Operand 5176 states and 10305 transitions. [2021-06-05 15:50:54,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:54,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:54,582 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:54,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:54,782 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:54,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:54,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1928347677, now seen corresponding path program 121 times [2021-06-05 15:50:54,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:54,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629968524] [2021-06-05 15:50:54,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:55,115 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:55,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:55,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629968524] [2021-06-05 15:50:55,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629968524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:55,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974472248] [2021-06-05 15:50:55,116 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 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 15:50:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:55,143 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:55,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:55,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:55,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:55,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:55,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:55,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:55,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:55,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:50:55,694 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:55,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974472248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:55,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:55,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2021-06-05 15:50:55,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698160660] [2021-06-05 15:50:55,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:50:55,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:55,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:50:55,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:50:55,695 INFO L87 Difference]: Start difference. First operand 5176 states and 10305 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:56,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:56,130 INFO L93 Difference]: Finished difference Result 6970 states and 13987 transitions. [2021-06-05 15:50:56,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:50:56,131 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:56,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:56,137 INFO L225 Difference]: With dead ends: 6970 [2021-06-05 15:50:56,137 INFO L226 Difference]: Without dead ends: 6925 [2021-06-05 15:50:56,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 703.0ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:50:56,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6925 states. [2021-06-05 15:50:56,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6925 to 5176. [2021-06-05 15:50:56,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5176 states, 5175 states have (on average 1.991304347826087) internal successors, (10305), 5175 states have internal predecessors, (10305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:56,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5176 states to 5176 states and 10305 transitions. [2021-06-05 15:50:56,185 INFO L78 Accepts]: Start accepts. Automaton has 5176 states and 10305 transitions. Word has length 43 [2021-06-05 15:50:56,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:56,186 INFO L482 AbstractCegarLoop]: Abstraction has 5176 states and 10305 transitions. [2021-06-05 15:50:56,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:56,186 INFO L276 IsEmpty]: Start isEmpty. Operand 5176 states and 10305 transitions. [2021-06-05 15:50:56,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:50:56,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:56,189 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:56,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 15:50:56,391 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:56,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:56,391 INFO L82 PathProgramCache]: Analyzing trace with hash 945298195, now seen corresponding path program 122 times [2021-06-05 15:50:56,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:56,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567457238] [2021-06-05 15:50:56,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:56,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:56,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567457238] [2021-06-05 15:50:56,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567457238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:56,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307737111] [2021-06-05 15:50:56,723 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 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 15:50:56,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:50:56,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:56,749 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:56,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:57,142 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-06-05 15:50:57,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:57,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:57,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:57,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:57,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:145, output treesize:7 [2021-06-05 15:50:57,154 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:57,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307737111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:57,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:57,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 26 [2021-06-05 15:50:57,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824845742] [2021-06-05 15:50:57,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:50:57,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:57,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:50:57,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:50:57,155 INFO L87 Difference]: Start difference. First operand 5176 states and 10305 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:57,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:57,518 INFO L93 Difference]: Finished difference Result 6778 states and 13577 transitions. [2021-06-05 15:50:57,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:50:57,518 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:50:57,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:57,524 INFO L225 Difference]: With dead ends: 6778 [2021-06-05 15:50:57,524 INFO L226 Difference]: Without dead ends: 6763 [2021-06-05 15:50:57,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 618.8ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:50:57,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2021-06-05 15:50:57,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 5183. [2021-06-05 15:50:57,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5183 states, 5182 states have (on average 1.991509069857198) internal successors, (10320), 5182 states have internal predecessors, (10320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:57,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5183 states to 5183 states and 10320 transitions. [2021-06-05 15:50:57,572 INFO L78 Accepts]: Start accepts. Automaton has 5183 states and 10320 transitions. Word has length 43 [2021-06-05 15:50:57,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:57,572 INFO L482 AbstractCegarLoop]: Abstraction has 5183 states and 10320 transitions. [2021-06-05 15:50:57,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:57,573 INFO L276 IsEmpty]: Start isEmpty. Operand 5183 states and 10320 transitions. [2021-06-05 15:50:57,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:50:57,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:57,576 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:57,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:57,785 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:57,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:57,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1365327806, now seen corresponding path program 123 times [2021-06-05 15:50:57,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:57,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581659439] [2021-06-05 15:50:57,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 53 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:50:57,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:57,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581659439] [2021-06-05 15:50:57,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581659439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:57,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008925673] [2021-06-05 15:50:57,832 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 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 15:50:57,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:50:57,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:57,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 15:50:57,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:57,918 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 53 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:50:57,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008925673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:57,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:57,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 15:50:57,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021497473] [2021-06-05 15:50:57,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:50:57,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:57,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:50:57,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:50:57,919 INFO L87 Difference]: Start difference. First operand 5183 states and 10320 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:57,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:57,957 INFO L93 Difference]: Finished difference Result 5616 states and 11180 transitions. [2021-06-05 15:50:57,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:50:57,958 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 15:50:57,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:57,962 INFO L225 Difference]: With dead ends: 5616 [2021-06-05 15:50:57,962 INFO L226 Difference]: Without dead ends: 5602 [2021-06-05 15:50:57,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:50:57,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5602 states. [2021-06-05 15:50:57,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5602 to 5194. [2021-06-05 15:50:58,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5194 states, 5193 states have (on average 1.9924898902368573) internal successors, (10347), 5193 states have internal predecessors, (10347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:58,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5194 states to 5194 states and 10347 transitions. [2021-06-05 15:50:58,006 INFO L78 Accepts]: Start accepts. Automaton has 5194 states and 10347 transitions. Word has length 44 [2021-06-05 15:50:58,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:58,006 INFO L482 AbstractCegarLoop]: Abstraction has 5194 states and 10347 transitions. [2021-06-05 15:50:58,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:58,006 INFO L276 IsEmpty]: Start isEmpty. Operand 5194 states and 10347 transitions. [2021-06-05 15:50:58,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:50:58,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:58,010 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:58,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 15:50:58,225 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:58,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:58,226 INFO L82 PathProgramCache]: Analyzing trace with hash -930359854, now seen corresponding path program 124 times [2021-06-05 15:50:58,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:58,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804383400] [2021-06-05 15:50:58,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 60 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:58,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:58,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804383400] [2021-06-05 15:50:58,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804383400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:58,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921135442] [2021-06-05 15:50:58,296 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 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 15:50:58,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:50:58,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:58,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 15:50:58,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 60 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:58,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921135442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:58,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:58,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 15:50:58,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147890722] [2021-06-05 15:50:58,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:50:58,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:58,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:50:58,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:50:58,423 INFO L87 Difference]: Start difference. First operand 5194 states and 10347 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:58,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:58,467 INFO L93 Difference]: Finished difference Result 5677 states and 11327 transitions. [2021-06-05 15:50:58,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:50:58,467 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 15:50:58,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:58,471 INFO L225 Difference]: With dead ends: 5677 [2021-06-05 15:50:58,471 INFO L226 Difference]: Without dead ends: 5668 [2021-06-05 15:50:58,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:50:58,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5668 states. [2021-06-05 15:50:58,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5668 to 5257. [2021-06-05 15:50:58,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5257 states, 5256 states have (on average 1.995433789954338) internal successors, (10488), 5256 states have internal predecessors, (10488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:58,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 10488 transitions. [2021-06-05 15:50:58,523 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 10488 transitions. Word has length 44 [2021-06-05 15:50:58,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:58,523 INFO L482 AbstractCegarLoop]: Abstraction has 5257 states and 10488 transitions. [2021-06-05 15:50:58,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:58,523 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 10488 transitions. [2021-06-05 15:50:58,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 15:50:58,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:58,526 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:58,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 15:50:58,727 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:58,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:58,727 INFO L82 PathProgramCache]: Analyzing trace with hash -748801414, now seen corresponding path program 125 times [2021-06-05 15:50:58,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:58,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101632787] [2021-06-05 15:50:58,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:59,064 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:59,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:59,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101632787] [2021-06-05 15:50:59,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101632787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:59,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24034445] [2021-06-05 15:50:59,064 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 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 15:50:59,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 15:50:59,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:59,096 WARN L261 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:50:59,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:59,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:59,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:59,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:59,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 15:50:59,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:59,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:59,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:59,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 15:50:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:59,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24034445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:59,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:59,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 27 [2021-06-05 15:50:59,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685554556] [2021-06-05 15:50:59,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:50:59,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:59,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:50:59,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:50:59,633 INFO L87 Difference]: Start difference. First operand 5257 states and 10488 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:01,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:01,442 INFO L93 Difference]: Finished difference Result 8586 states and 17459 transitions. [2021-06-05 15:51:01,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:51:01,442 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 15:51:01,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:01,449 INFO L225 Difference]: With dead ends: 8586 [2021-06-05 15:51:01,449 INFO L226 Difference]: Without dead ends: 8466 [2021-06-05 15:51:01,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 2080.7ms TimeCoverageRelationStatistics Valid=270, Invalid=1892, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:51:01,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8466 states. [2021-06-05 15:51:01,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8466 to 5282. [2021-06-05 15:51:01,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5282 states, 5281 states have (on average 1.996212838477561) internal successors, (10542), 5281 states have internal predecessors, (10542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:01,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5282 states to 5282 states and 10542 transitions. [2021-06-05 15:51:01,501 INFO L78 Accepts]: Start accepts. Automaton has 5282 states and 10542 transitions. Word has length 46 [2021-06-05 15:51:01,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:01,501 INFO L482 AbstractCegarLoop]: Abstraction has 5282 states and 10542 transitions. [2021-06-05 15:51:01,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:01,502 INFO L276 IsEmpty]: Start isEmpty. Operand 5282 states and 10542 transitions. [2021-06-05 15:51:01,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:51:01,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:01,505 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:01,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:01,705 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:01,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:01,706 INFO L82 PathProgramCache]: Analyzing trace with hash 91309083, now seen corresponding path program 126 times [2021-06-05 15:51:01,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:01,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704906923] [2021-06-05 15:51:01,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:02,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:02,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704906923] [2021-06-05 15:51:02,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704906923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:02,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179810614] [2021-06-05 15:51:02,016 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 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 15:51:02,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 15:51:02,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:02,049 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 15:51:02,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:02,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:02,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:02,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:02,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:02,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:02,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:02,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:02,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:02,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:02,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 15:51:02,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:02,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:02,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:02,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 15:51:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:02,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179810614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:02,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:02,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-06-05 15:51:02,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898895753] [2021-06-05 15:51:02,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:51:02,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:02,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:51:02,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:51:02,923 INFO L87 Difference]: Start difference. First operand 5282 states and 10542 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:03,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:03,602 INFO L93 Difference]: Finished difference Result 9697 states and 19645 transitions. [2021-06-05 15:51:03,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:51:03,602 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 15:51:03,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:03,611 INFO L225 Difference]: With dead ends: 9697 [2021-06-05 15:51:03,611 INFO L226 Difference]: Without dead ends: 9575 [2021-06-05 15:51:03,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 982.5ms TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:51:03,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9575 states. [2021-06-05 15:51:03,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9575 to 5303. [2021-06-05 15:51:03,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5303 states, 5302 states have (on average 1.99622783855149) internal successors, (10584), 5302 states have internal predecessors, (10584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:03,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5303 states to 5303 states and 10584 transitions. [2021-06-05 15:51:03,674 INFO L78 Accepts]: Start accepts. Automaton has 5303 states and 10584 transitions. Word has length 47 [2021-06-05 15:51:03,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:03,674 INFO L482 AbstractCegarLoop]: Abstraction has 5303 states and 10584 transitions. [2021-06-05 15:51:03,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:03,674 INFO L276 IsEmpty]: Start isEmpty. Operand 5303 states and 10584 transitions. [2021-06-05 15:51:03,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:51:03,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:03,678 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:03,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:03,878 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:03,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:03,879 INFO L82 PathProgramCache]: Analyzing trace with hash 590250667, now seen corresponding path program 127 times [2021-06-05 15:51:03,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:03,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169245643] [2021-06-05 15:51:03,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:04,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:04,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169245643] [2021-06-05 15:51:04,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169245643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:04,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752205051] [2021-06-05 15:51:04,228 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 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 15:51:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:04,254 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-05 15:51:04,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:05,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:05,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:05,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:05,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:05,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:05,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:05,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:05,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:05,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:05,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 60 [2021-06-05 15:51:05,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:05,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:05,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:05,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:176, output treesize:7 [2021-06-05 15:51:05,103 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:05,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752205051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:05,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:05,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-06-05 15:51:05,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35567385] [2021-06-05 15:51:05,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:51:05,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:05,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:51:05,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:51:05,103 INFO L87 Difference]: Start difference. First operand 5303 states and 10584 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:05,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:05,575 INFO L93 Difference]: Finished difference Result 9274 states and 18836 transitions. [2021-06-05 15:51:05,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:51:05,575 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 15:51:05,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:05,583 INFO L225 Difference]: With dead ends: 9274 [2021-06-05 15:51:05,583 INFO L226 Difference]: Without dead ends: 9152 [2021-06-05 15:51:05,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 996.5ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:51:05,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9152 states. [2021-06-05 15:51:05,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9152 to 5363. [2021-06-05 15:51:05,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5363 states, 5362 states have (on average 1.9962700484893696) internal successors, (10704), 5362 states have internal predecessors, (10704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:05,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5363 states to 5363 states and 10704 transitions. [2021-06-05 15:51:05,641 INFO L78 Accepts]: Start accepts. Automaton has 5363 states and 10704 transitions. Word has length 47 [2021-06-05 15:51:05,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:05,641 INFO L482 AbstractCegarLoop]: Abstraction has 5363 states and 10704 transitions. [2021-06-05 15:51:05,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:05,642 INFO L276 IsEmpty]: Start isEmpty. Operand 5363 states and 10704 transitions. [2021-06-05 15:51:05,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:51:05,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:05,661 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:05,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:05,861 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:05,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:05,861 INFO L82 PathProgramCache]: Analyzing trace with hash -533528613, now seen corresponding path program 128 times [2021-06-05 15:51:05,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:05,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282796719] [2021-06-05 15:51:05,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:06,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:06,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282796719] [2021-06-05 15:51:06,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282796719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:06,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254302918] [2021-06-05 15:51:06,157 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 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 15:51:06,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:51:06,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:06,185 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 15:51:06,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:06,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:06,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:06,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:06,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:06,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:07,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:07,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:07,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:07,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:07,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 15:51:07,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:07,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:07,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:07,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 15:51:07,048 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:07,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254302918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:07,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:07,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 35 [2021-06-05 15:51:07,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149493371] [2021-06-05 15:51:07,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:51:07,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:07,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:51:07,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:51:07,049 INFO L87 Difference]: Start difference. First operand 5363 states and 10704 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:07,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:07,671 INFO L93 Difference]: Finished difference Result 9393 states and 18931 transitions. [2021-06-05 15:51:07,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:51:07,672 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 15:51:07,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:07,679 INFO L225 Difference]: With dead ends: 9393 [2021-06-05 15:51:07,679 INFO L226 Difference]: Without dead ends: 9327 [2021-06-05 15:51:07,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 943.0ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:51:07,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9327 states. [2021-06-05 15:51:07,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9327 to 5330. [2021-06-05 15:51:07,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5330 states, 5329 states have (on average 1.9941827735034716) internal successors, (10627), 5329 states have internal predecessors, (10627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5330 states to 5330 states and 10627 transitions. [2021-06-05 15:51:07,734 INFO L78 Accepts]: Start accepts. Automaton has 5330 states and 10627 transitions. Word has length 47 [2021-06-05 15:51:07,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:07,735 INFO L482 AbstractCegarLoop]: Abstraction has 5330 states and 10627 transitions. [2021-06-05 15:51:07,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:07,735 INFO L276 IsEmpty]: Start isEmpty. Operand 5330 states and 10627 transitions. [2021-06-05 15:51:07,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:51:07,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:07,738 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:07,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:07,939 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:07,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:07,939 INFO L82 PathProgramCache]: Analyzing trace with hash 499962331, now seen corresponding path program 129 times [2021-06-05 15:51:07,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:07,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343640346] [2021-06-05 15:51:07,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:08,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:08,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343640346] [2021-06-05 15:51:08,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343640346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:08,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967610798] [2021-06-05 15:51:08,293 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 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 15:51:08,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 15:51:08,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:08,328 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-05 15:51:08,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:09,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:09,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:09,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:09,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:09,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:09,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:09,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:09,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:09,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 15:51:09,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:09,459 INFO L628 ElimStorePlain]: treesize reduction 5, result has 80.0 percent of original size [2021-06-05 15:51:09,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:09,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:180, output treesize:7 [2021-06-05 15:51:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:09,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967610798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:09,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:09,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-06-05 15:51:09,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319703606] [2021-06-05 15:51:09,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:51:09,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:09,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:51:09,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:51:09,471 INFO L87 Difference]: Start difference. First operand 5330 states and 10627 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:13,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:13,398 INFO L93 Difference]: Finished difference Result 9678 states and 19547 transitions. [2021-06-05 15:51:13,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:51:13,399 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 15:51:13,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:13,407 INFO L225 Difference]: With dead ends: 9678 [2021-06-05 15:51:13,407 INFO L226 Difference]: Without dead ends: 9218 [2021-06-05 15:51:13,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 3411.3ms TimeCoverageRelationStatistics Valid=330, Invalid=3830, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:51:13,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9218 states. [2021-06-05 15:51:13,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9218 to 5507. [2021-06-05 15:51:13,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5507 states, 5506 states have (on average 1.995277878677806) internal successors, (10986), 5506 states have internal predecessors, (10986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:13,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5507 states to 5507 states and 10986 transitions. [2021-06-05 15:51:13,465 INFO L78 Accepts]: Start accepts. Automaton has 5507 states and 10986 transitions. Word has length 47 [2021-06-05 15:51:13,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:13,465 INFO L482 AbstractCegarLoop]: Abstraction has 5507 states and 10986 transitions. [2021-06-05 15:51:13,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:13,466 INFO L276 IsEmpty]: Start isEmpty. Operand 5507 states and 10986 transitions. [2021-06-05 15:51:13,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:51:13,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:13,469 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:13,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 15:51:13,670 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:13,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:13,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1480573845, now seen corresponding path program 130 times [2021-06-05 15:51:13,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:13,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238526443] [2021-06-05 15:51:13,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:14,009 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:14,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:14,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238526443] [2021-06-05 15:51:14,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238526443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:14,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290437699] [2021-06-05 15:51:14,009 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 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 15:51:14,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:51:14,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:14,037 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-05 15:51:14,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:14,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:14,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:14,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:14,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:14,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:14,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:14,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:14,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:14,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:14,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 60 [2021-06-05 15:51:14,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:14,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:14,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:14,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:176, output treesize:7 [2021-06-05 15:51:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:14,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290437699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:14,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:14,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-06-05 15:51:14,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057929462] [2021-06-05 15:51:14,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:51:14,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:14,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:51:14,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:51:14,899 INFO L87 Difference]: Start difference. First operand 5507 states and 10986 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:15,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:15,670 INFO L93 Difference]: Finished difference Result 8590 states and 17250 transitions. [2021-06-05 15:51:15,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:51:15,671 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 15:51:15,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:15,677 INFO L225 Difference]: With dead ends: 8590 [2021-06-05 15:51:15,677 INFO L226 Difference]: Without dead ends: 8567 [2021-06-05 15:51:15,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 992.5ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:51:15,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8567 states. [2021-06-05 15:51:15,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8567 to 5513. [2021-06-05 15:51:15,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5513 states, 5512 states have (on average 1.9954644412191582) internal successors, (10999), 5512 states have internal predecessors, (10999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:15,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5513 states to 5513 states and 10999 transitions. [2021-06-05 15:51:15,733 INFO L78 Accepts]: Start accepts. Automaton has 5513 states and 10999 transitions. Word has length 47 [2021-06-05 15:51:15,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:15,733 INFO L482 AbstractCegarLoop]: Abstraction has 5513 states and 10999 transitions. [2021-06-05 15:51:15,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:15,733 INFO L276 IsEmpty]: Start isEmpty. Operand 5513 states and 10999 transitions. [2021-06-05 15:51:15,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:51:15,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:15,737 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:15,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 15:51:15,937 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:15,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:15,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1502990453, now seen corresponding path program 131 times [2021-06-05 15:51:15,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:15,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021245965] [2021-06-05 15:51:15,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:16,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:16,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021245965] [2021-06-05 15:51:16,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021245965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:16,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735647822] [2021-06-05 15:51:16,260 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 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 15:51:16,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 15:51:16,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:16,292 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 15:51:16,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:17,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:17,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:17,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:17,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:17,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:17,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:17,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:17,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:17,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:17,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 15:51:17,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:17,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:17,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:17,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 15:51:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:17,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735647822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:17,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:17,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-06-05 15:51:17,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434315902] [2021-06-05 15:51:17,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:51:17,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:17,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:51:17,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:51:17,184 INFO L87 Difference]: Start difference. First operand 5513 states and 10999 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:18,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:18,077 INFO L93 Difference]: Finished difference Result 11538 states and 23485 transitions. [2021-06-05 15:51:18,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:51:18,077 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 15:51:18,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:18,087 INFO L225 Difference]: With dead ends: 11538 [2021-06-05 15:51:18,087 INFO L226 Difference]: Without dead ends: 11355 [2021-06-05 15:51:18,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1000.9ms TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:51:18,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11355 states. [2021-06-05 15:51:18,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11355 to 5330. [2021-06-05 15:51:18,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5330 states, 5329 states have (on average 1.99962469506474) internal successors, (10656), 5329 states have internal predecessors, (10656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:18,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5330 states to 5330 states and 10656 transitions. [2021-06-05 15:51:18,149 INFO L78 Accepts]: Start accepts. Automaton has 5330 states and 10656 transitions. Word has length 47 [2021-06-05 15:51:18,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:18,150 INFO L482 AbstractCegarLoop]: Abstraction has 5330 states and 10656 transitions. [2021-06-05 15:51:18,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:18,150 INFO L276 IsEmpty]: Start isEmpty. Operand 5330 states and 10656 transitions. [2021-06-05 15:51:18,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:51:18,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:18,153 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:18,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 15:51:18,354 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:18,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:18,354 INFO L82 PathProgramCache]: Analyzing trace with hash -158396757, now seen corresponding path program 132 times [2021-06-05 15:51:18,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:18,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435372662] [2021-06-05 15:51:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:18,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:18,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435372662] [2021-06-05 15:51:18,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435372662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:18,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45300484] [2021-06-05 15:51:18,637 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 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 15:51:18,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 15:51:18,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:18,667 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 15:51:18,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:19,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:19,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:19,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:19,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:19,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:19,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:19,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:19,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:19,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:19,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 15:51:19,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:19,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:19,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:19,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 15:51:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:19,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45300484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:19,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:19,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 33 [2021-06-05 15:51:19,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637301622] [2021-06-05 15:51:19,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:51:19,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:19,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:51:19,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:51:19,511 INFO L87 Difference]: Start difference. First operand 5330 states and 10656 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:20,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:20,354 INFO L93 Difference]: Finished difference Result 6335 states and 12694 transitions. [2021-06-05 15:51:20,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:51:20,355 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 15:51:20,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:20,360 INFO L225 Difference]: With dead ends: 6335 [2021-06-05 15:51:20,360 INFO L226 Difference]: Without dead ends: 6300 [2021-06-05 15:51:20,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1275.5ms TimeCoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:51:20,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6300 states. [2021-06-05 15:51:20,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6300 to 4817. [2021-06-05 15:51:20,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4817 states, 4816 states have (on average 1.995016611295681) internal successors, (9608), 4816 states have internal predecessors, (9608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:20,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4817 states to 4817 states and 9608 transitions. [2021-06-05 15:51:20,400 INFO L78 Accepts]: Start accepts. Automaton has 4817 states and 9608 transitions. Word has length 47 [2021-06-05 15:51:20,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:20,400 INFO L482 AbstractCegarLoop]: Abstraction has 4817 states and 9608 transitions. [2021-06-05 15:51:20,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:20,401 INFO L276 IsEmpty]: Start isEmpty. Operand 4817 states and 9608 transitions. [2021-06-05 15:51:20,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:51:20,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:20,404 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:20,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:20,604 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:20,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:20,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1004048869, now seen corresponding path program 133 times [2021-06-05 15:51:20,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:20,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373464365] [2021-06-05 15:51:20,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:20,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:20,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373464365] [2021-06-05 15:51:20,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373464365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:20,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033391421] [2021-06-05 15:51:20,947 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 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 15:51:20,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:20,974 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 15:51:20,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:21,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:21,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:21,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:21,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:21,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:21,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:21,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:21,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:21,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 15:51:21,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:21,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:21,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:21,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 15:51:21,839 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:21,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033391421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:21,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:21,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-06-05 15:51:21,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72915056] [2021-06-05 15:51:21,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:51:21,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:21,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:51:21,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:51:21,840 INFO L87 Difference]: Start difference. First operand 4817 states and 9608 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:22,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:22,730 INFO L93 Difference]: Finished difference Result 9532 states and 19425 transitions. [2021-06-05 15:51:22,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:51:22,730 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 15:51:22,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:22,737 INFO L225 Difference]: With dead ends: 9532 [2021-06-05 15:51:22,737 INFO L226 Difference]: Without dead ends: 9364 [2021-06-05 15:51:22,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 994.0ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:51:22,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9364 states. [2021-06-05 15:51:22,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9364 to 4844. [2021-06-05 15:51:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4844 states, 4843 states have (on average 1.993392525294239) internal successors, (9654), 4843 states have internal predecessors, (9654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:22,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4844 states to 4844 states and 9654 transitions. [2021-06-05 15:51:22,787 INFO L78 Accepts]: Start accepts. Automaton has 4844 states and 9654 transitions. Word has length 47 [2021-06-05 15:51:22,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:22,787 INFO L482 AbstractCegarLoop]: Abstraction has 4844 states and 9654 transitions. [2021-06-05 15:51:22,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:22,787 INFO L276 IsEmpty]: Start isEmpty. Operand 4844 states and 9654 transitions. [2021-06-05 15:51:22,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:51:22,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:22,790 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:22,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 15:51:22,990 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:22,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:22,991 INFO L82 PathProgramCache]: Analyzing trace with hash -248685093, now seen corresponding path program 134 times [2021-06-05 15:51:22,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:22,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737584351] [2021-06-05 15:51:22,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:23,270 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:23,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:23,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737584351] [2021-06-05 15:51:23,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737584351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:23,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88984185] [2021-06-05 15:51:23,270 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 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 15:51:23,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:51:23,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:23,298 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 15:51:23,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:24,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:24,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:24,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:24,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:24,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:24,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:24,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:24,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:24,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:24,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 15:51:24,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:24,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:24,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:24,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 15:51:24,136 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:24,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88984185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:24,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:24,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 33 [2021-06-05 15:51:24,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135951345] [2021-06-05 15:51:24,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:51:24,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:24,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:51:24,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:51:24,137 INFO L87 Difference]: Start difference. First operand 4844 states and 9654 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:25,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:25,316 INFO L93 Difference]: Finished difference Result 6513 states and 13009 transitions. [2021-06-05 15:51:25,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:51:25,316 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 15:51:25,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:25,322 INFO L225 Difference]: With dead ends: 6513 [2021-06-05 15:51:25,322 INFO L226 Difference]: Without dead ends: 6115 [2021-06-05 15:51:25,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1349.2ms TimeCoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:51:25,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6115 states. [2021-06-05 15:51:25,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6115 to 4875. [2021-06-05 15:51:25,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4875 states, 4874 states have (on average 1.9883052933935166) internal successors, (9691), 4874 states have internal predecessors, (9691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:25,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4875 states to 4875 states and 9691 transitions. [2021-06-05 15:51:25,365 INFO L78 Accepts]: Start accepts. Automaton has 4875 states and 9691 transitions. Word has length 47 [2021-06-05 15:51:25,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:25,365 INFO L482 AbstractCegarLoop]: Abstraction has 4875 states and 9691 transitions. [2021-06-05 15:51:25,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:25,365 INFO L276 IsEmpty]: Start isEmpty. Operand 4875 states and 9691 transitions. [2021-06-05 15:51:25,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:51:25,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:25,368 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:25,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:25,569 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:25,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:25,569 INFO L82 PathProgramCache]: Analyzing trace with hash -2127828149, now seen corresponding path program 135 times [2021-06-05 15:51:25,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:25,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085820881] [2021-06-05 15:51:25,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:25,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:25,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085820881] [2021-06-05 15:51:25,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085820881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:25,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269615186] [2021-06-05 15:51:25,867 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 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 15:51:25,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 15:51:25,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:25,901 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 71 conjunts are in the unsatisfiable core [2021-06-05 15:51:25,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:06,702 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 15:53:06,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:53:06,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:53:06,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:53:06,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:53:06,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:53:06,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:53:06,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:53:06,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:06,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:53:06,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 60 [2021-06-05 15:53:06,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:06,796 INFO L628 ElimStorePlain]: treesize reduction 3, result has 92.1 percent of original size [2021-06-05 15:53:06,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:06,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:181, output treesize:7 [2021-06-05 15:53:06,805 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 136 refuted. 6 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:06,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269615186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:06,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:06,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 35 [2021-06-05 15:53:06,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999213125] [2021-06-05 15:53:06,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:53:06,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:06,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:53:06,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1125, Unknown=24, NotChecked=0, Total=1260 [2021-06-05 15:53:06,806 INFO L87 Difference]: Start difference. First operand 4875 states and 9691 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:17,830 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2021-06-05 15:54:04,636 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2021-06-05 15:54:38,211 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-06-05 15:54:52,536 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-06-05 15:55:17,181 WARN L227 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2021-06-05 15:55:17,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:55:17,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:55:17,382 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:899) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:860) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:774) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:474) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:238) ... 48 more [2021-06-05 15:55:17,388 INFO L168 Benchmark]: Toolchain (without parser) took 817284.32 ms. Allocated memory was 360.7 MB in the beginning and 752.9 MB in the end (delta: 392.2 MB). Free memory was 340.6 MB in the beginning and 620.9 MB in the end (delta: -280.3 MB). Peak memory consumption was 113.9 MB. Max. memory is 16.0 GB. [2021-06-05 15:55:17,388 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 360.7 MB. Free memory was 341.7 MB in the beginning and 341.7 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:55:17,388 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.72 ms. Allocated memory is still 360.7 MB. Free memory was 340.5 MB in the beginning and 339.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:55:17,388 INFO L168 Benchmark]: Boogie Preprocessor took 12.92 ms. Allocated memory is still 360.7 MB. Free memory was 339.1 MB in the beginning and 338.2 MB in the end (delta: 919.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:55:17,388 INFO L168 Benchmark]: RCFGBuilder took 159.59 ms. Allocated memory is still 360.7 MB. Free memory was 338.1 MB in the beginning and 326.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 15:55:17,388 INFO L168 Benchmark]: TraceAbstraction took 817086.42 ms. Allocated memory was 360.7 MB in the beginning and 752.9 MB in the end (delta: 392.2 MB). Free memory was 325.5 MB in the beginning and 620.9 MB in the end (delta: -295.4 MB). Peak memory consumption was 99.2 MB. Max. memory is 16.0 GB. [2021-06-05 15:55:17,388 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 0.10 ms. Allocated memory is still 360.7 MB. Free memory was 341.7 MB in the beginning and 341.7 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.72 ms. Allocated memory is still 360.7 MB. Free memory was 340.5 MB in the beginning and 339.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.92 ms. Allocated memory is still 360.7 MB. Free memory was 339.1 MB in the beginning and 338.2 MB in the end (delta: 919.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 159.59 ms. Allocated memory is still 360.7 MB. Free memory was 338.1 MB in the beginning and 326.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 817086.42 ms. Allocated memory was 360.7 MB in the beginning and 752.9 MB in the end (delta: 392.2 MB). Free memory was 325.5 MB in the beginning and 620.9 MB in the end (delta: -295.4 MB). Peak memory consumption was 99.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...