/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 21:49:40,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 21:49:40,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 21:49:40,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 21:49:40,986 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.epf [2021-03-10 21:49:41,013 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 21:49:41,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 21:49:41,014 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 21:49:41,014 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 21:49:41,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 21:49:41,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 21:49:41,016 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 21:49:41,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 21:49:41,017 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 21:49:41,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 21:49:41,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 21:49:41,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 21:49:41,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 21:49:41,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 21:49:41,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 21:49:41,018 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 21:49:41,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 21:49:41,018 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 21:49:41,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 21:49:41,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 21:49:41,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 21:49:41,018 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 21:49:41,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 21:49:41,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:49:41,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 21:49:41,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 21:49:41,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 21:49:41,019 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 21:49:41,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 21:49:41,019 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 21:49:41,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 21:49:41,019 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 21:49:41,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 21:49:41,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 21:49:41,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 21:49:41,277 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 21:49:41,278 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 21:49:41,278 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl [2021-03-10 21:49:41,278 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl' [2021-03-10 21:49:41,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 21:49:41,321 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 21:49:41,322 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 21:49:41,322 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 21:49:41,322 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 21:49:41,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:49:41" (1/1) ... [2021-03-10 21:49:41,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:49:41" (1/1) ... [2021-03-10 21:49:41,346 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 21:49:41,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 21:49:41,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 21:49:41,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 21:49:41,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:49:41" (1/1) ... [2021-03-10 21:49:41,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:49:41" (1/1) ... [2021-03-10 21:49:41,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:49:41" (1/1) ... [2021-03-10 21:49:41,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:49:41" (1/1) ... [2021-03-10 21:49:41,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:49:41" (1/1) ... [2021-03-10 21:49:41,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:49:41" (1/1) ... [2021-03-10 21:49:41,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:49:41" (1/1) ... [2021-03-10 21:49:41,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 21:49:41,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 21:49:41,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 21:49:41,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 21:49:41,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:49:41" (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 [2021-03-10 21:49:41,428 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 21:49:41,429 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 21:49:41,429 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 21:49:41,429 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 21:49:41,429 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 21:49:41,429 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 21:49:41,429 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 21:49:41,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 21:49:41,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 21:49:41,429 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 21:49:41,429 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 21:49:41,430 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 21:49:41,431 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 21:49:41,704 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 21:49:41,704 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-03-10 21:49:41,705 INFO L202 PluginConnector]: Adding new model chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:49:41 BoogieIcfgContainer [2021-03-10 21:49:41,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 21:49:41,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 21:49:41,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 21:49:41,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 21:49:41,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:49:41" (1/2) ... [2021-03-10 21:49:41,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efaf129 and model type chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 09:49:41, skipping insertion in model container [2021-03-10 21:49:41,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:49:41" (2/2) ... [2021-03-10 21:49:41,711 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-subst.wvr.bpl [2021-03-10 21:49:41,714 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 21:49:41,714 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 21:49:41,716 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 21:49:41,717 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 21:49:41,740 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-10 21:49:41,752 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-10 21:49:41,776 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 21:49:41,776 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 21:49:41,776 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 21:49:41,776 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 21:49:41,776 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 21:49:41,776 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 21:49:41,776 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 21:49:41,776 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 21:49:41,784 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2021-03-10 21:49:41,803 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:41,805 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:41,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:41,813 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:41,813 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:41,814 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:41,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:41,818 INFO L82 PathProgramCache]: Analyzing trace with hash 480470199, now seen corresponding path program 1 times [2021-03-10 21:49:41,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:41,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560044061] [2021-03-10 21:49:41,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:41,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:41,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560044061] [2021-03-10 21:49:41,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:49:41,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:49:41,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483271759] [2021-03-10 21:49:41,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:49:41,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:41,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:49:41,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:49:41,994 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:42,040 INFO L93 Difference]: Finished difference Result 248 states and 694 transitions. [2021-03-10 21:49:42,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:49:42,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:49:42,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:42,050 INFO L225 Difference]: With dead ends: 248 [2021-03-10 21:49:42,050 INFO L226 Difference]: Without dead ends: 248 [2021-03-10 21:49:42,051 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:49:42,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-03-10 21:49:42,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 129. [2021-03-10 21:49:42,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.9609375) internal successors, (379), 128 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 379 transitions. [2021-03-10 21:49:42,085 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 379 transitions. Word has length 17 [2021-03-10 21:49:42,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:42,085 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 379 transitions. [2021-03-10 21:49:42,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,086 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 379 transitions. [2021-03-10 21:49:42,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:42,087 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:42,087 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:42,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 21:49:42,087 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:42,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:42,087 INFO L82 PathProgramCache]: Analyzing trace with hash 2011052617, now seen corresponding path program 2 times [2021-03-10 21:49:42,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:42,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089890781] [2021-03-10 21:49:42,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:42,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:42,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089890781] [2021-03-10 21:49:42,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:49:42,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:49:42,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074627930] [2021-03-10 21:49:42,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:49:42,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:42,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:49:42,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:49:42,132 INFO L87 Difference]: Start difference. First operand 129 states and 379 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:42,154 INFO L93 Difference]: Finished difference Result 206 states and 576 transitions. [2021-03-10 21:49:42,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:49:42,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:49:42,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:42,159 INFO L225 Difference]: With dead ends: 206 [2021-03-10 21:49:42,159 INFO L226 Difference]: Without dead ends: 183 [2021-03-10 21:49:42,160 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:49:42,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-03-10 21:49:42,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 129. [2021-03-10 21:49:42,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2021-03-10 21:49:42,173 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2021-03-10 21:49:42,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:42,173 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2021-03-10 21:49:42,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,173 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2021-03-10 21:49:42,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:42,174 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:42,174 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:42,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 21:49:42,174 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:42,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:42,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1571987321, now seen corresponding path program 3 times [2021-03-10 21:49:42,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:42,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794508019] [2021-03-10 21:49:42,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:42,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:42,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794508019] [2021-03-10 21:49:42,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:49:42,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:49:42,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130481610] [2021-03-10 21:49:42,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:49:42,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:42,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:49:42,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:49:42,240 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:42,262 INFO L93 Difference]: Finished difference Result 141 states and 406 transitions. [2021-03-10 21:49:42,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:49:42,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:49:42,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:42,265 INFO L225 Difference]: With dead ends: 141 [2021-03-10 21:49:42,265 INFO L226 Difference]: Without dead ends: 141 [2021-03-10 21:49:42,265 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:49:42,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-03-10 21:49:42,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 129. [2021-03-10 21:49:42,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2021-03-10 21:49:42,285 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2021-03-10 21:49:42,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:42,286 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2021-03-10 21:49:42,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,286 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2021-03-10 21:49:42,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:49:42,287 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:42,287 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:42,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 21:49:42,287 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:42,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:42,287 INFO L82 PathProgramCache]: Analyzing trace with hash -2134989050, now seen corresponding path program 1 times [2021-03-10 21:49:42,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:42,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122532331] [2021-03-10 21:49:42,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:42,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122532331] [2021-03-10 21:49:42,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:49:42,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 21:49:42,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62167847] [2021-03-10 21:49:42,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:49:42,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:42,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:49:42,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:49:42,360 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:42,401 INFO L93 Difference]: Finished difference Result 265 states and 764 transitions. [2021-03-10 21:49:42,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:49:42,401 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:49:42,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:42,404 INFO L225 Difference]: With dead ends: 265 [2021-03-10 21:49:42,404 INFO L226 Difference]: Without dead ends: 238 [2021-03-10 21:49:42,404 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:49:42,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-03-10 21:49:42,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 178. [2021-03-10 21:49:42,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9152542372881354) internal successors, (516), 177 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2021-03-10 21:49:42,417 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 18 [2021-03-10 21:49:42,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:42,417 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2021-03-10 21:49:42,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,417 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2021-03-10 21:49:42,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:49:42,423 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:42,423 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:42,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 21:49:42,423 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:42,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:42,424 INFO L82 PathProgramCache]: Analyzing trace with hash -2040272752, now seen corresponding path program 2 times [2021-03-10 21:49:42,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:42,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956137841] [2021-03-10 21:49:42,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:42,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956137841] [2021-03-10 21:49:42,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:49:42,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 21:49:42,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143929894] [2021-03-10 21:49:42,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:49:42,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:42,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:49:42,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:49:42,513 INFO L87 Difference]: Start difference. First operand 178 states and 516 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:42,619 INFO L93 Difference]: Finished difference Result 372 states and 1056 transitions. [2021-03-10 21:49:42,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:49:42,619 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:49:42,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:42,622 INFO L225 Difference]: With dead ends: 372 [2021-03-10 21:49:42,622 INFO L226 Difference]: Without dead ends: 345 [2021-03-10 21:49:42,622 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:49:42,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-03-10 21:49:42,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 195. [2021-03-10 21:49:42,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 3.0412371134020617) internal successors, (590), 194 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 590 transitions. [2021-03-10 21:49:42,645 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 590 transitions. Word has length 18 [2021-03-10 21:49:42,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:42,645 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 590 transitions. [2021-03-10 21:49:42,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,645 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 590 transitions. [2021-03-10 21:49:42,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:49:42,646 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:42,646 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:42,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 21:49:42,646 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:42,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:42,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1165937426, now seen corresponding path program 3 times [2021-03-10 21:49:42,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:42,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817471226] [2021-03-10 21:49:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:42,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817471226] [2021-03-10 21:49:42,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:49:42,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 21:49:42,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476769202] [2021-03-10 21:49:42,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:49:42,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:42,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:49:42,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:49:42,748 INFO L87 Difference]: Start difference. First operand 195 states and 590 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:42,831 INFO L93 Difference]: Finished difference Result 372 states and 1031 transitions. [2021-03-10 21:49:42,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:49:42,832 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:49:42,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:42,834 INFO L225 Difference]: With dead ends: 372 [2021-03-10 21:49:42,834 INFO L226 Difference]: Without dead ends: 332 [2021-03-10 21:49:42,834 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:49:42,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-03-10 21:49:42,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 195. [2021-03-10 21:49:42,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 3.0103092783505154) internal successors, (584), 194 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 584 transitions. [2021-03-10 21:49:42,840 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 584 transitions. Word has length 18 [2021-03-10 21:49:42,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:42,840 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 584 transitions. [2021-03-10 21:49:42,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,840 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 584 transitions. [2021-03-10 21:49:42,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:49:42,841 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:42,841 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:42,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-10 21:49:42,841 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:42,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:42,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1639624874, now seen corresponding path program 4 times [2021-03-10 21:49:42,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:42,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691029736] [2021-03-10 21:49:42,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:42,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691029736] [2021-03-10 21:49:42,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:49:42,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 21:49:42,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035910328] [2021-03-10 21:49:42,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:49:42,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:42,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:49:42,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:49:42,895 INFO L87 Difference]: Start difference. First operand 195 states and 584 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:42,955 INFO L93 Difference]: Finished difference Result 318 states and 896 transitions. [2021-03-10 21:49:42,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:49:42,955 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:49:42,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:42,956 INFO L225 Difference]: With dead ends: 318 [2021-03-10 21:49:42,957 INFO L226 Difference]: Without dead ends: 255 [2021-03-10 21:49:42,957 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:49:42,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-03-10 21:49:42,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 195. [2021-03-10 21:49:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9536082474226806) internal successors, (573), 194 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 573 transitions. [2021-03-10 21:49:42,962 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 573 transitions. Word has length 18 [2021-03-10 21:49:42,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:42,962 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 573 transitions. [2021-03-10 21:49:42,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,962 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 573 transitions. [2021-03-10 21:49:42,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:49:42,962 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:42,963 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:42,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 21:49:42,963 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:42,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:42,963 INFO L82 PathProgramCache]: Analyzing trace with hash 479941677, now seen corresponding path program 1 times [2021-03-10 21:49:42,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:42,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188303759] [2021-03-10 21:49:42,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:42,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188303759] [2021-03-10 21:49:42,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:49:42,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:49:42,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346080852] [2021-03-10 21:49:42,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:49:42,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:42,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:49:42,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:49:42,992 INFO L87 Difference]: Start difference. First operand 195 states and 573 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:43,013 INFO L93 Difference]: Finished difference Result 291 states and 852 transitions. [2021-03-10 21:49:43,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:49:43,013 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:49:43,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:43,015 INFO L225 Difference]: With dead ends: 291 [2021-03-10 21:49:43,015 INFO L226 Difference]: Without dead ends: 291 [2021-03-10 21:49:43,015 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:49:43,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-03-10 21:49:43,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 183. [2021-03-10 21:49:43,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9835164835164836) internal successors, (543), 182 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 543 transitions. [2021-03-10 21:49:43,019 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 543 transitions. Word has length 19 [2021-03-10 21:49:43,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:43,020 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 543 transitions. [2021-03-10 21:49:43,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,020 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 543 transitions. [2021-03-10 21:49:43,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:49:43,020 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:43,020 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:43,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-10 21:49:43,021 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:43,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:43,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1607604885, now seen corresponding path program 1 times [2021-03-10 21:49:43,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:43,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643790297] [2021-03-10 21:49:43,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:43,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643790297] [2021-03-10 21:49:43,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:49:43,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:49:43,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750102793] [2021-03-10 21:49:43,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:49:43,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:43,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:49:43,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:49:43,043 INFO L87 Difference]: Start difference. First operand 183 states and 543 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:43,063 INFO L93 Difference]: Finished difference Result 285 states and 816 transitions. [2021-03-10 21:49:43,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:49:43,063 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:49:43,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:43,064 INFO L225 Difference]: With dead ends: 285 [2021-03-10 21:49:43,064 INFO L226 Difference]: Without dead ends: 261 [2021-03-10 21:49:43,064 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:49:43,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-03-10 21:49:43,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 183. [2021-03-10 21:49:43,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-03-10 21:49:43,069 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 19 [2021-03-10 21:49:43,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:43,069 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-03-10 21:49:43,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,069 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-03-10 21:49:43,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:49:43,070 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:43,070 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:43,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-10 21:49:43,070 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:43,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:43,070 INFO L82 PathProgramCache]: Analyzing trace with hash -727237863, now seen corresponding path program 2 times [2021-03-10 21:49:43,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:43,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934164374] [2021-03-10 21:49:43,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:43,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934164374] [2021-03-10 21:49:43,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:49:43,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:49:43,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695726023] [2021-03-10 21:49:43,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:49:43,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:43,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:49:43,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:49:43,097 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:43,132 INFO L93 Difference]: Finished difference Result 279 states and 798 transitions. [2021-03-10 21:49:43,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:49:43,132 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:49:43,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:43,134 INFO L225 Difference]: With dead ends: 279 [2021-03-10 21:49:43,134 INFO L226 Difference]: Without dead ends: 279 [2021-03-10 21:49:43,134 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:49:43,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-03-10 21:49:43,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 183. [2021-03-10 21:49:43,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-03-10 21:49:43,138 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 19 [2021-03-10 21:49:43,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:43,138 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-03-10 21:49:43,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,138 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-03-10 21:49:43,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:49:43,139 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:43,139 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:43,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-10 21:49:43,139 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:43,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:43,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1821936781, now seen corresponding path program 2 times [2021-03-10 21:49:43,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:43,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712909453] [2021-03-10 21:49:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:43,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:43,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712909453] [2021-03-10 21:49:43,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:49:43,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:49:43,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063735834] [2021-03-10 21:49:43,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:49:43,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:43,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:49:43,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:49:43,166 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:43,203 INFO L93 Difference]: Finished difference Result 333 states and 939 transitions. [2021-03-10 21:49:43,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:49:43,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:49:43,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:43,205 INFO L225 Difference]: With dead ends: 333 [2021-03-10 21:49:43,205 INFO L226 Difference]: Without dead ends: 321 [2021-03-10 21:49:43,205 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:49:43,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-03-10 21:49:43,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 201. [2021-03-10 21:49:43,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.955) internal successors, (591), 200 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 591 transitions. [2021-03-10 21:49:43,210 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 591 transitions. Word has length 19 [2021-03-10 21:49:43,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:43,210 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 591 transitions. [2021-03-10 21:49:43,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,210 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 591 transitions. [2021-03-10 21:49:43,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:49:43,211 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:43,211 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:43,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-10 21:49:43,211 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:43,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:43,211 INFO L82 PathProgramCache]: Analyzing trace with hash -2087354603, now seen corresponding path program 3 times [2021-03-10 21:49:43,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:43,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816713591] [2021-03-10 21:49:43,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:43,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:43,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816713591] [2021-03-10 21:49:43,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:49:43,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:49:43,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937576667] [2021-03-10 21:49:43,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:49:43,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:43,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:49:43,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:49:43,239 INFO L87 Difference]: Start difference. First operand 201 states and 591 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:43,268 INFO L93 Difference]: Finished difference Result 280 states and 812 transitions. [2021-03-10 21:49:43,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:49:43,268 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:49:43,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:43,270 INFO L225 Difference]: With dead ends: 280 [2021-03-10 21:49:43,270 INFO L226 Difference]: Without dead ends: 280 [2021-03-10 21:49:43,270 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:49:43,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-03-10 21:49:43,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 189. [2021-03-10 21:49:43,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.952127659574468) internal successors, (555), 188 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 555 transitions. [2021-03-10 21:49:43,274 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 555 transitions. Word has length 19 [2021-03-10 21:49:43,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:43,274 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 555 transitions. [2021-03-10 21:49:43,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,274 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 555 transitions. [2021-03-10 21:49:43,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:49:43,275 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:43,275 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:43,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-10 21:49:43,275 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:43,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:43,276 INFO L82 PathProgramCache]: Analyzing trace with hash -2087010031, now seen corresponding path program 3 times [2021-03-10 21:49:43,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:43,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626294735] [2021-03-10 21:49:43,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:43,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626294735] [2021-03-10 21:49:43,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:49:43,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:49:43,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384589377] [2021-03-10 21:49:43,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:49:43,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:43,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:49:43,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:49:43,299 INFO L87 Difference]: Start difference. First operand 189 states and 555 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:43,324 INFO L93 Difference]: Finished difference Result 220 states and 628 transitions. [2021-03-10 21:49:43,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:49:43,324 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:49:43,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:43,325 INFO L225 Difference]: With dead ends: 220 [2021-03-10 21:49:43,325 INFO L226 Difference]: Without dead ends: 207 [2021-03-10 21:49:43,325 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:49:43,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-03-10 21:49:43,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2021-03-10 21:49:43,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-03-10 21:49:43,329 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-03-10 21:49:43,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:43,329 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-03-10 21:49:43,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,330 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-03-10 21:49:43,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:49:43,330 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:43,330 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:43,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-10 21:49:43,330 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:43,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:43,331 INFO L82 PathProgramCache]: Analyzing trace with hash 248842827, now seen corresponding path program 4 times [2021-03-10 21:49:43,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:43,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420359783] [2021-03-10 21:49:43,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:43,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420359783] [2021-03-10 21:49:43,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:49:43,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:49:43,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110764279] [2021-03-10 21:49:43,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:49:43,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:43,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:49:43,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:49:43,358 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:43,395 INFO L93 Difference]: Finished difference Result 207 states and 591 transitions. [2021-03-10 21:49:43,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:49:43,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:49:43,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:43,397 INFO L225 Difference]: With dead ends: 207 [2021-03-10 21:49:43,397 INFO L226 Difference]: Without dead ends: 195 [2021-03-10 21:49:43,397 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:49:43,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-03-10 21:49:43,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-03-10 21:49:43,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.922680412371134) internal successors, (567), 194 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 567 transitions. [2021-03-10 21:49:43,401 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 567 transitions. Word has length 19 [2021-03-10 21:49:43,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:43,401 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 567 transitions. [2021-03-10 21:49:43,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,401 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 567 transitions. [2021-03-10 21:49:43,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:49:43,402 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:43,402 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:43,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-10 21:49:43,402 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:43,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:43,403 INFO L82 PathProgramCache]: Analyzing trace with hash -16574995, now seen corresponding path program 5 times [2021-03-10 21:49:43,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:43,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635395076] [2021-03-10 21:49:43,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:43,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:43,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635395076] [2021-03-10 21:49:43,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:49:43,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:49:43,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174529995] [2021-03-10 21:49:43,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:49:43,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:43,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:49:43,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:49:43,432 INFO L87 Difference]: Start difference. First operand 195 states and 567 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:43,465 INFO L93 Difference]: Finished difference Result 214 states and 623 transitions. [2021-03-10 21:49:43,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:49:43,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:49:43,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:43,467 INFO L225 Difference]: With dead ends: 214 [2021-03-10 21:49:43,467 INFO L226 Difference]: Without dead ends: 214 [2021-03-10 21:49:43,467 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:49:43,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-03-10 21:49:43,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 189. [2021-03-10 21:49:43,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-03-10 21:49:43,471 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-03-10 21:49:43,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:43,471 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-03-10 21:49:43,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,471 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-03-10 21:49:43,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:49:43,472 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:43,472 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:43,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-03-10 21:49:43,472 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:43,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:43,472 INFO L82 PathProgramCache]: Analyzing trace with hash -554430573, now seen corresponding path program 6 times [2021-03-10 21:49:43,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:43,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073065898] [2021-03-10 21:49:43,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:43,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073065898] [2021-03-10 21:49:43,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:49:43,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:49:43,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322592162] [2021-03-10 21:49:43,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:49:43,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:43,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:49:43,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:49:43,498 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:43,522 INFO L93 Difference]: Finished difference Result 208 states and 605 transitions. [2021-03-10 21:49:43,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:49:43,522 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:49:43,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:43,539 INFO L225 Difference]: With dead ends: 208 [2021-03-10 21:49:43,539 INFO L226 Difference]: Without dead ends: 208 [2021-03-10 21:49:43,540 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:49:43,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-03-10 21:49:43,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 189. [2021-03-10 21:49:43,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-03-10 21:49:43,543 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-03-10 21:49:43,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:43,544 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-03-10 21:49:43,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,544 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-03-10 21:49:43,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:49:43,544 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:43,544 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:43,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-03-10 21:49:43,544 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:43,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:43,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1066078798, now seen corresponding path program 1 times [2021-03-10 21:49:43,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:43,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578593335] [2021-03-10 21:49:43,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:43,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:49:43,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578593335] [2021-03-10 21:49:43,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362167294] [2021-03-10 21:49:43,581 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) [2021-03-10 21:49:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:43,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:43,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:49:43,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:43,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 21:49:43,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371012094] [2021-03-10 21:49:43,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:49:43,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:43,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:49:43,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:49:43,720 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:43,762 INFO L93 Difference]: Finished difference Result 313 states and 911 transitions. [2021-03-10 21:49:43,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:49:43,763 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:49:43,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:43,764 INFO L225 Difference]: With dead ends: 313 [2021-03-10 21:49:43,764 INFO L226 Difference]: Without dead ends: 220 [2021-03-10 21:49:43,764 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:49:43,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-03-10 21:49:43,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2021-03-10 21:49:43,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.9269406392694064) internal successors, (641), 219 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 641 transitions. [2021-03-10 21:49:43,768 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 641 transitions. Word has length 20 [2021-03-10 21:49:43,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:43,768 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 641 transitions. [2021-03-10 21:49:43,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:43,769 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 641 transitions. [2021-03-10 21:49:43,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:49:43,769 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:43,769 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:43,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 21:49:43,983 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:43,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:43,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1099695243, now seen corresponding path program 2 times [2021-03-10 21:49:43,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:43,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958466796] [2021-03-10 21:49:43,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:49:44,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958466796] [2021-03-10 21:49:44,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38193469] [2021-03-10 21:49:44,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:44,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:49:44,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:44,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:49:44,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:49:44,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:44,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:49:44,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088618806] [2021-03-10 21:49:44,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:49:44,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:44,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:49:44,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:49:44,153 INFO L87 Difference]: Start difference. First operand 220 states and 641 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:44,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:44,270 INFO L93 Difference]: Finished difference Result 344 states and 1003 transitions. [2021-03-10 21:49:44,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:49:44,271 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:49:44,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:44,272 INFO L225 Difference]: With dead ends: 344 [2021-03-10 21:49:44,272 INFO L226 Difference]: Without dead ends: 251 [2021-03-10 21:49:44,272 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 130.9ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:49:44,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-03-10 21:49:44,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2021-03-10 21:49:44,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.932) internal successors, (733), 250 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:44,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 733 transitions. [2021-03-10 21:49:44,277 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 733 transitions. Word has length 21 [2021-03-10 21:49:44,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:44,277 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 733 transitions. [2021-03-10 21:49:44,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:44,277 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 733 transitions. [2021-03-10 21:49:44,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:49:44,278 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:44,278 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:44,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 21:49:44,495 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:44,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:44,495 INFO L82 PathProgramCache]: Analyzing trace with hash 2141805038, now seen corresponding path program 3 times [2021-03-10 21:49:44,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:44,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477645472] [2021-03-10 21:49:44,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:44,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477645472] [2021-03-10 21:49:44,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500802223] [2021-03-10 21:49:44,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:44,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:49:44,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:44,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:49:44,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:49:44,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:44,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-03-10 21:49:44,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140068073] [2021-03-10 21:49:44,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:49:44,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:44,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:49:44,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:49:44,671 INFO L87 Difference]: Start difference. First operand 251 states and 733 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2021-03-10 21:49:44,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:44,780 INFO L93 Difference]: Finished difference Result 398 states and 1158 transitions. [2021-03-10 21:49:44,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:49:44,781 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 22 [2021-03-10 21:49:44,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:44,782 INFO L225 Difference]: With dead ends: 398 [2021-03-10 21:49:44,782 INFO L226 Difference]: Without dead ends: 288 [2021-03-10 21:49:44,783 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:49:44,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-03-10 21:49:44,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 282. [2021-03-10 21:49:44,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.9359430604982206) internal successors, (825), 281 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:44,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 825 transitions. [2021-03-10 21:49:44,788 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 825 transitions. Word has length 22 [2021-03-10 21:49:44,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:44,788 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 825 transitions. [2021-03-10 21:49:44,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2021-03-10 21:49:44,788 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 825 transitions. [2021-03-10 21:49:44,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:49:44,789 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:44,789 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:44,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:44,995 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:44,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:44,996 INFO L82 PathProgramCache]: Analyzing trace with hash 87470315, now seen corresponding path program 4 times [2021-03-10 21:49:44,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:44,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249508524] [2021-03-10 21:49:44,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:45,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249508524] [2021-03-10 21:49:45,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024809748] [2021-03-10 21:49:45,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:49:45,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:49:45,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:45,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:45,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:45,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:49:45,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:45,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-03-10 21:49:45,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701845687] [2021-03-10 21:49:45,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:49:45,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:45,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:49:45,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:49:45,206 INFO L87 Difference]: Start difference. First operand 282 states and 825 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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) [2021-03-10 21:49:45,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:45,346 INFO L93 Difference]: Finished difference Result 429 states and 1250 transitions. [2021-03-10 21:49:45,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:49:45,347 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 23 [2021-03-10 21:49:45,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:45,348 INFO L225 Difference]: With dead ends: 429 [2021-03-10 21:49:45,348 INFO L226 Difference]: Without dead ends: 319 [2021-03-10 21:49:45,348 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 173.7ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:45,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-03-10 21:49:45,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 313. [2021-03-10 21:49:45,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.9391025641025643) internal successors, (917), 312 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:45,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 917 transitions. [2021-03-10 21:49:45,354 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 917 transitions. Word has length 23 [2021-03-10 21:49:45,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:45,354 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 917 transitions. [2021-03-10 21:49:45,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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) [2021-03-10 21:49:45,354 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 917 transitions. [2021-03-10 21:49:45,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:49:45,355 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:45,355 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:45,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:45,571 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:45,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:45,571 INFO L82 PathProgramCache]: Analyzing trace with hash 827603342, now seen corresponding path program 5 times [2021-03-10 21:49:45,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:45,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019363920] [2021-03-10 21:49:45,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:49:45,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019363920] [2021-03-10 21:49:45,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988303160] [2021-03-10 21:49:45,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:49:45,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:49:45,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:45,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:49:45,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:45,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:49:45,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:45,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:49:45,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:49:45,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-03-10 21:49:45,957 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:49:45,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-03-10 21:49:45,962 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:46,015 INFO L628 ElimStorePlain]: treesize reduction 9, result has 92.6 percent of original size [2021-03-10 21:49:46,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:49:46,017 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:112 [2021-03-10 21:49:46,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:49:46,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:46,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:49:46,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:46,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:49:46,153 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:46,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:49:46,157 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:46,195 INFO L628 ElimStorePlain]: treesize reduction 62, result has 19.5 percent of original size [2021-03-10 21:49:46,196 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:49:46,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:49:46,196 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:15 [2021-03-10 21:49:46,235 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:49:46,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:46,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-03-10 21:49:46,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526843236] [2021-03-10 21:49:46,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:49:46,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:46,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:49:46,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:49:46,237 INFO L87 Difference]: Start difference. First operand 313 states and 917 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:46,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:46,449 INFO L93 Difference]: Finished difference Result 477 states and 1313 transitions. [2021-03-10 21:49:46,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:49:46,450 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:49:46,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:46,452 INFO L225 Difference]: With dead ends: 477 [2021-03-10 21:49:46,452 INFO L226 Difference]: Without dead ends: 404 [2021-03-10 21:49:46,453 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 300.2ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:49:46,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-03-10 21:49:46,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 319. [2021-03-10 21:49:46,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.930817610062893) internal successors, (932), 318 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:46,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 932 transitions. [2021-03-10 21:49:46,460 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 932 transitions. Word has length 24 [2021-03-10 21:49:46,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:46,461 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 932 transitions. [2021-03-10 21:49:46,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:46,461 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 932 transitions. [2021-03-10 21:49:46,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:49:46,462 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:46,462 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:46,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-10 21:49:46,668 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:46,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:46,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1274656876, now seen corresponding path program 6 times [2021-03-10 21:49:46,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:46,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006189405] [2021-03-10 21:49:46,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:49:46,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006189405] [2021-03-10 21:49:46,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781509830] [2021-03-10 21:49:46,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:46,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:49:46,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:46,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:49:46,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:46,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:49:46,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:47,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:49:47,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:49:47,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-03-10 21:49:47,007 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:49:47,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-03-10 21:49:47,010 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:47,073 INFO L628 ElimStorePlain]: treesize reduction 9, result has 92.6 percent of original size [2021-03-10 21:49:47,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:49:47,076 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:112 [2021-03-10 21:49:47,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:49:47,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:47,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:49:47,229 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:47,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:49:47,234 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:47,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:49:47,237 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:47,256 INFO L628 ElimStorePlain]: treesize reduction 62, result has 19.5 percent of original size [2021-03-10 21:49:47,256 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:49:47,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:49:47,259 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:15 [2021-03-10 21:49:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:49:47,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:47,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 21:49:47,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144632688] [2021-03-10 21:49:47,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:49:47,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:47,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:49:47,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:49:47,299 INFO L87 Difference]: Start difference. First operand 319 states and 932 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:47,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:47,506 INFO L93 Difference]: Finished difference Result 465 states and 1281 transitions. [2021-03-10 21:49:47,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:49:47,506 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:49:47,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:47,510 INFO L225 Difference]: With dead ends: 465 [2021-03-10 21:49:47,510 INFO L226 Difference]: Without dead ends: 406 [2021-03-10 21:49:47,510 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 381.0ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:47,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-03-10 21:49:47,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 321. [2021-03-10 21:49:47,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.921875) internal successors, (935), 320 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 935 transitions. [2021-03-10 21:49:47,518 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 935 transitions. Word has length 24 [2021-03-10 21:49:47,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:47,519 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 935 transitions. [2021-03-10 21:49:47,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:47,519 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 935 transitions. [2021-03-10 21:49:47,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:49:47,520 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:47,520 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:47,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:47,734 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:47,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:47,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1282338604, now seen corresponding path program 7 times [2021-03-10 21:49:47,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:47,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594616648] [2021-03-10 21:49:47,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:49:47,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594616648] [2021-03-10 21:49:47,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854520874] [2021-03-10 21:49:47,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:47,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:49:47,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:48,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:48,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:48,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-03-10 21:49:48,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:48,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:48,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:48,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:48,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:48,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:49:48,132 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:53 [2021-03-10 21:49:48,266 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_3], 1=[o_0, v_prenex_2]} [2021-03-10 21:49:48,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:49:48,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:48,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:49:48,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:48,368 INFO L628 ElimStorePlain]: treesize reduction 54, result has 65.6 percent of original size [2021-03-10 21:49:48,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:49:48,372 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:48,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:49:48,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:48,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:48,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:48,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:49:48,422 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:48,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:48,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:48,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:49:48,457 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:48,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:48,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:49:48,496 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:173, output treesize:47 [2021-03-10 21:49:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:49:48,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:48,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:49:48,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406913129] [2021-03-10 21:49:48,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:48,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:48,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:48,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:48,614 INFO L87 Difference]: Start difference. First operand 321 states and 935 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:48,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:48,920 INFO L93 Difference]: Finished difference Result 457 states and 1259 transitions. [2021-03-10 21:49:48,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:49:48,921 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:49:48,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:48,923 INFO L225 Difference]: With dead ends: 457 [2021-03-10 21:49:48,923 INFO L226 Difference]: Without dead ends: 408 [2021-03-10 21:49:48,923 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 498.3ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:49:48,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-03-10 21:49:48,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 323. [2021-03-10 21:49:48,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9130434782608696) internal successors, (938), 322 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:48,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 938 transitions. [2021-03-10 21:49:48,935 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 938 transitions. Word has length 24 [2021-03-10 21:49:48,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:48,935 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 938 transitions. [2021-03-10 21:49:48,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:48,935 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 938 transitions. [2021-03-10 21:49:48,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:49:48,936 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:48,936 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:49,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:49,153 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:49,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:49,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1261019758, now seen corresponding path program 8 times [2021-03-10 21:49:49,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:49,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509034260] [2021-03-10 21:49:49,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:49:49,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509034260] [2021-03-10 21:49:49,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555904255] [2021-03-10 21:49:49,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:49,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:49:49,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:49,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:49:49,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:49,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:49,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:49,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:49:49,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:49,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:49,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:49:49,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:49,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:49,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:49:49,537 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:47 [2021-03-10 21:49:49,646 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-03-10 21:49:49,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:49:49,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:49,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:49:49,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:49,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:49,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:49,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:49,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:49:49,686 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:49,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:49,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:49:49,692 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:49,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:49,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:49:49,712 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:25 [2021-03-10 21:49:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:49:49,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:49,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:49:49,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602638455] [2021-03-10 21:49:49,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:49:49,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:49,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:49:49,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:49,761 INFO L87 Difference]: Start difference. First operand 323 states and 938 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:50,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:50,284 INFO L93 Difference]: Finished difference Result 433 states and 1249 transitions. [2021-03-10 21:49:50,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:49:50,285 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:49:50,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:50,286 INFO L225 Difference]: With dead ends: 433 [2021-03-10 21:49:50,286 INFO L226 Difference]: Without dead ends: 374 [2021-03-10 21:49:50,286 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 507.2ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:49:50,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-03-10 21:49:50,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 326. [2021-03-10 21:49:50,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.913846153846154) internal successors, (947), 325 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:50,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 947 transitions. [2021-03-10 21:49:50,295 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 947 transitions. Word has length 24 [2021-03-10 21:49:50,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:50,296 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 947 transitions. [2021-03-10 21:49:50,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:50,296 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 947 transitions. [2021-03-10 21:49:50,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:49:50,296 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:50,297 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:50,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 21:49:50,511 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:50,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:50,513 INFO L82 PathProgramCache]: Analyzing trace with hash -476952058, now seen corresponding path program 9 times [2021-03-10 21:49:50,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:50,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796994477] [2021-03-10 21:49:50,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:49:50,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796994477] [2021-03-10 21:49:50,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782110476] [2021-03-10 21:49:50,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:50,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:49:50,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:50,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:49:50,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:50,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:49:50,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:50,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:49:50,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:50,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-03-10 21:49:50,882 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:49:50,884 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 36 treesize of output 28 [2021-03-10 21:49:50,885 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:49:50,962 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.2 percent of original size [2021-03-10 21:49:50,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:49:50,963 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:161, output treesize:135 [2021-03-10 21:49:51,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:49:51,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:51,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:49:51,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:51,245 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-03-10 21:49:51,245 INFO L628 ElimStorePlain]: treesize reduction 161, result has 58.8 percent of original size [2021-03-10 21:49:51,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:49:51,253 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:51,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:51,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:49:51,327 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:51,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:49:51,331 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:51,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:49:51,334 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:51,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:51,398 INFO L518 ElimStorePlain]: Eliminatee v_prenex_10 vanished before elimination [2021-03-10 21:49:51,398 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:49:51,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:49:51,401 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:51,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:49:51,405 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:51,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:49:51,408 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:51,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:51,464 INFO L518 ElimStorePlain]: Eliminatee v_prenex_6 vanished before elimination [2021-03-10 21:49:51,464 INFO L518 ElimStorePlain]: Eliminatee v_prenex_7 vanished before elimination [2021-03-10 21:49:51,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 21:49:51,465 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 8 variables, input treesize:445, output treesize:121 [2021-03-10 21:49:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:49:51,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:51,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 21:49:51,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550401126] [2021-03-10 21:49:51,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:49:51,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:51,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:49:51,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:49:51,601 INFO L87 Difference]: Start difference. First operand 326 states and 947 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:51,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:51,803 INFO L93 Difference]: Finished difference Result 397 states and 1113 transitions. [2021-03-10 21:49:51,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:49:51,804 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:49:51,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:51,805 INFO L225 Difference]: With dead ends: 397 [2021-03-10 21:49:51,805 INFO L226 Difference]: Without dead ends: 348 [2021-03-10 21:49:51,805 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 409.2ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:51,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-03-10 21:49:51,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 328. [2021-03-10 21:49:51,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.91131498470948) internal successors, (952), 327 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:51,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 952 transitions. [2021-03-10 21:49:51,812 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 952 transitions. Word has length 24 [2021-03-10 21:49:51,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:51,812 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 952 transitions. [2021-03-10 21:49:51,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:51,812 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 952 transitions. [2021-03-10 21:49:51,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:49:51,813 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:51,813 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:52,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:52,029 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:52,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:52,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1014444914, now seen corresponding path program 10 times [2021-03-10 21:49:52,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:52,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071156551] [2021-03-10 21:49:52,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:52,208 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:49:52,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071156551] [2021-03-10 21:49:52,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750672382] [2021-03-10 21:49:52,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:52,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:49:52,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:52,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:49:52,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:52,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:49:52,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:52,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:49:52,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:52,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:52,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:49:52,358 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:87, output treesize:71 [2021-03-10 21:49:52,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:52,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:52,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:49:52,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:52,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:52,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:52,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:49:52,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:52,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:52,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:52,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:49:52,458 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:52,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:52,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-03-10 21:49:52,463 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:52,535 INFO L628 ElimStorePlain]: treesize reduction 51, result has 63.0 percent of original size [2021-03-10 21:49:52,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:52,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:52,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:49:52,541 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:52,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:52,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:49:52,549 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:52,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:52,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:49:52,583 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:177, output treesize:47 [2021-03-10 21:49:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:49:52,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:52,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:49:52,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780246616] [2021-03-10 21:49:52,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:52,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:52,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:52,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:52,671 INFO L87 Difference]: Start difference. First operand 328 states and 952 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:52,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:52,926 INFO L93 Difference]: Finished difference Result 401 states and 1125 transitions. [2021-03-10 21:49:52,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:49:52,927 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:49:52,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:52,928 INFO L225 Difference]: With dead ends: 401 [2021-03-10 21:49:52,928 INFO L226 Difference]: Without dead ends: 348 [2021-03-10 21:49:52,928 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 417.2ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:49:52,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-03-10 21:49:52,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 328. [2021-03-10 21:49:52,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.91131498470948) internal successors, (952), 327 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:52,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 952 transitions. [2021-03-10 21:49:52,933 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 952 transitions. Word has length 24 [2021-03-10 21:49:52,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:52,934 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 952 transitions. [2021-03-10 21:49:52,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:52,934 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 952 transitions. [2021-03-10 21:49:52,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:49:52,934 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:52,934 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:53,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:53,149 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:53,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:53,149 INFO L82 PathProgramCache]: Analyzing trace with hash -952364244, now seen corresponding path program 11 times [2021-03-10 21:49:53,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:53,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73153769] [2021-03-10 21:49:53,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:53,343 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:49:53,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73153769] [2021-03-10 21:49:53,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684652537] [2021-03-10 21:49:53,343 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 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 [2021-03-10 21:49:53,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:49:53,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:53,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:49:53,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:53,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:53,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:53,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:49:53,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:53,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:53,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:53,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:49:53,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:53,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:53,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:53,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:49:53,458 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:53,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:53,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:49:53,462 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:53,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:53,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:49:53,506 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-03-10 21:49:53,746 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-03-10 21:49:53,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:49:53,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:53,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:49:53,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:53,775 INFO L628 ElimStorePlain]: treesize reduction 38, result has 43.3 percent of original size [2021-03-10 21:49:53,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:53,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:49:53,780 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:53,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:53,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:49:53,787 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:79, output treesize:12 [2021-03-10 21:49:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:49:53,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:53,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:49:53,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882390770] [2021-03-10 21:49:53,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:53,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:53,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:53,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:53,848 INFO L87 Difference]: Start difference. First operand 328 states and 952 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:54,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:54,545 INFO L93 Difference]: Finished difference Result 789 states and 2126 transitions. [2021-03-10 21:49:54,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:49:54,545 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:49:54,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:54,547 INFO L225 Difference]: With dead ends: 789 [2021-03-10 21:49:54,547 INFO L226 Difference]: Without dead ends: 689 [2021-03-10 21:49:54,547 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 765.0ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:49:54,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-03-10 21:49:54,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 367. [2021-03-10 21:49:54,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.890710382513661) internal successors, (1058), 366 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:54,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1058 transitions. [2021-03-10 21:49:54,555 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1058 transitions. Word has length 24 [2021-03-10 21:49:54,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:54,555 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 1058 transitions. [2021-03-10 21:49:54,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:54,555 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1058 transitions. [2021-03-10 21:49:54,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:49:54,556 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:54,556 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:54,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-03-10 21:49:54,773 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:54,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:54,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1240342834, now seen corresponding path program 12 times [2021-03-10 21:49:54,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:54,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948984260] [2021-03-10 21:49:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:54,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:49:54,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948984260] [2021-03-10 21:49:54,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584572365] [2021-03-10 21:49:54,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:55,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:49:55,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:55,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:49:55,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:55,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:55,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:55,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:49:55,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:55,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:55,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:49:55,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:55,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:55,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:49:55,086 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:47 [2021-03-10 21:49:55,270 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-03-10 21:49:55,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:49:55,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:55,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:49:55,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:55,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:55,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:55,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:55,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:49:55,305 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:55,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:55,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:49:55,309 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:55,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:55,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:49:55,328 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:25 [2021-03-10 21:49:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:49:55,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:55,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:49:55,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010528400] [2021-03-10 21:49:55,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:49:55,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:55,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:49:55,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:55,382 INFO L87 Difference]: Start difference. First operand 367 states and 1058 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:56,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:56,344 INFO L93 Difference]: Finished difference Result 690 states and 1925 transitions. [2021-03-10 21:49:56,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:49:56,344 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:49:56,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:56,348 INFO L225 Difference]: With dead ends: 690 [2021-03-10 21:49:56,348 INFO L226 Difference]: Without dead ends: 611 [2021-03-10 21:49:56,348 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 922.1ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:49:56,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-03-10 21:49:56,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 380. [2021-03-10 21:49:56,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.8680738786279685) internal successors, (1087), 379 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:56,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1087 transitions. [2021-03-10 21:49:56,355 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1087 transitions. Word has length 24 [2021-03-10 21:49:56,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:56,355 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 1087 transitions. [2021-03-10 21:49:56,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:56,356 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1087 transitions. [2021-03-10 21:49:56,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:49:56,356 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:56,356 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:56,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-03-10 21:49:56,571 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:56,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:56,572 INFO L82 PathProgramCache]: Analyzing trace with hash -497628982, now seen corresponding path program 13 times [2021-03-10 21:49:56,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:56,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846448532] [2021-03-10 21:49:56,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:49:56,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846448532] [2021-03-10 21:49:56,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271505588] [2021-03-10 21:49:56,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:49:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:56,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:49:56,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:56,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:56,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:56,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:49:56,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:56,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:56,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:56,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:49:56,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:56,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:56,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:56,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:49:56,853 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:56,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:56,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:49:56,857 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:56,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:56,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:49:56,897 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-03-10 21:49:57,079 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_19, o_4], 1=[o_0, v_prenex_18]} [2021-03-10 21:49:57,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:49:57,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:57,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:49:57,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:57,196 INFO L628 ElimStorePlain]: treesize reduction 66, result has 59.0 percent of original size [2021-03-10 21:49:57,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:49:57,200 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:57,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:57,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:57,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:49:57,237 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:57,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:57,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:57,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:49:57,275 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:57,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:57,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:49:57,307 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:47 [2021-03-10 21:49:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:49:57,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:57,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:49:57,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868987016] [2021-03-10 21:49:57,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:49:57,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:57,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:49:57,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:57,389 INFO L87 Difference]: Start difference. First operand 380 states and 1087 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:58,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:58,079 INFO L93 Difference]: Finished difference Result 753 states and 2025 transitions. [2021-03-10 21:49:58,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:49:58,079 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:49:58,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:58,081 INFO L225 Difference]: With dead ends: 753 [2021-03-10 21:49:58,081 INFO L226 Difference]: Without dead ends: 665 [2021-03-10 21:49:58,082 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 762.5ms TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:49:58,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-03-10 21:49:58,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 384. [2021-03-10 21:49:58,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.8694516971279374) internal successors, (1099), 383 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:58,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1099 transitions. [2021-03-10 21:49:58,090 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1099 transitions. Word has length 24 [2021-03-10 21:49:58,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:58,090 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 1099 transitions. [2021-03-10 21:49:58,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:58,090 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1099 transitions. [2021-03-10 21:49:58,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:49:58,091 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:58,091 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:58,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-03-10 21:49:58,304 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:58,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:58,304 INFO L82 PathProgramCache]: Analyzing trace with hash -786675028, now seen corresponding path program 14 times [2021-03-10 21:49:58,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:58,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336785834] [2021-03-10 21:49:58,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:58,463 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:49:58,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336785834] [2021-03-10 21:49:58,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279306588] [2021-03-10 21:49:58,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:49:58,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:49:58,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:58,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:49:58,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:58,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:58,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:58,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:49:58,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:58,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:58,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:58,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:49:58,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:58,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:58,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:58,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:49:58,568 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:58,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:58,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:49:58,571 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:58,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:58,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:49:58,623 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-03-10 21:49:58,845 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-03-10 21:49:58,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:49:58,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:58,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:58,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:58,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:49:58,859 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:58,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:58,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:49:58,865 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:11 [2021-03-10 21:49:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:49:58,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:58,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:49:58,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236997088] [2021-03-10 21:49:58,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:58,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:58,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:58,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:58,903 INFO L87 Difference]: Start difference. First operand 384 states and 1099 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:59,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:59,229 INFO L93 Difference]: Finished difference Result 613 states and 1705 transitions. [2021-03-10 21:49:59,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:49:59,229 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:49:59,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:59,231 INFO L225 Difference]: With dead ends: 613 [2021-03-10 21:49:59,231 INFO L226 Difference]: Without dead ends: 594 [2021-03-10 21:49:59,232 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 380.2ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:49:59,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-03-10 21:49:59,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 377. [2021-03-10 21:49:59,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.875) internal successors, (1081), 376 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:59,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1081 transitions. [2021-03-10 21:49:59,239 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1081 transitions. Word has length 24 [2021-03-10 21:49:59,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:59,239 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 1081 transitions. [2021-03-10 21:49:59,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:59,239 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1081 transitions. [2021-03-10 21:49:59,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:49:59,240 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:59,240 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:59,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:59,455 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:59,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:59,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1760539924, now seen corresponding path program 15 times [2021-03-10 21:49:59,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:59,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829356721] [2021-03-10 21:49:59,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:49:59,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829356721] [2021-03-10 21:49:59,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006937602] [2021-03-10 21:49:59,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:59,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:49:59,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:59,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:49:59,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:59,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:59,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:59,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:49:59,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:59,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:59,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:59,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:49:59,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:59,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:59,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:59,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:49:59,758 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:59,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:59,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:49:59,762 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:59,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:59,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:49:59,803 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-03-10 21:50:00,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:50:00,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:00,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:50:00,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:00,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:50:00,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:00,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:50:00,058 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:00,094 INFO L628 ElimStorePlain]: treesize reduction 62, result has 19.5 percent of original size [2021-03-10 21:50:00,094 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:50:00,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:50:00,094 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:161, output treesize:15 [2021-03-10 21:50:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:00,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:00,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:00,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477593594] [2021-03-10 21:50:00,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:00,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:00,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:00,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:00,143 INFO L87 Difference]: Start difference. First operand 377 states and 1081 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:00,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:00,705 INFO L93 Difference]: Finished difference Result 664 states and 1887 transitions. [2021-03-10 21:50:00,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:50:00,705 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:00,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:00,707 INFO L225 Difference]: With dead ends: 664 [2021-03-10 21:50:00,707 INFO L226 Difference]: Without dead ends: 559 [2021-03-10 21:50:00,707 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 610.6ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:50:00,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-03-10 21:50:00,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 391. [2021-03-10 21:50:00,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.8974358974358974) internal successors, (1130), 390 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:00,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1130 transitions. [2021-03-10 21:50:00,715 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1130 transitions. Word has length 24 [2021-03-10 21:50:00,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:00,715 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 1130 transitions. [2021-03-10 21:50:00,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:00,715 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1130 transitions. [2021-03-10 21:50:00,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:00,716 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:00,716 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:00,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:00,931 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:00,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:00,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1849057620, now seen corresponding path program 16 times [2021-03-10 21:50:00,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:00,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906302576] [2021-03-10 21:50:00,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:00,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:01,180 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:01,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906302576] [2021-03-10 21:50:01,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603133561] [2021-03-10 21:50:01,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:01,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:50:01,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:01,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:01,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:01,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:01,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:01,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:01,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:01,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:01,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:01,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:01,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:01,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:01,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:01,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:01,338 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:01,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:01,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:01,342 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:01,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:01,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:01,416 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-03-10 21:50:01,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:01,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:01,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:50:01,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:01,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:01,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:50:01,791 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:01,949 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-03-10 21:50:01,950 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.1 percent of original size [2021-03-10 21:50:01,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:50:01,954 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:01,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:01,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:01,958 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:02,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:02,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:02,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:02,010 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:02,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:02,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:02,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:50:02,066 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:02,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:02,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:50:02,111 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:197, output treesize:47 [2021-03-10 21:50:02,215 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:02,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:02,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:02,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035268121] [2021-03-10 21:50:02,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:02,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:02,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:02,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:02,216 INFO L87 Difference]: Start difference. First operand 391 states and 1130 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:02,564 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 60 [2021-03-10 21:50:03,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:03,197 INFO L93 Difference]: Finished difference Result 659 states and 1820 transitions. [2021-03-10 21:50:03,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:50:03,198 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:03,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:03,200 INFO L225 Difference]: With dead ends: 659 [2021-03-10 21:50:03,200 INFO L226 Difference]: Without dead ends: 571 [2021-03-10 21:50:03,200 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1004.4ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:50:03,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-03-10 21:50:03,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 391. [2021-03-10 21:50:03,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.917948717948718) internal successors, (1138), 390 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:03,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1138 transitions. [2021-03-10 21:50:03,224 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1138 transitions. Word has length 24 [2021-03-10 21:50:03,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:03,225 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 1138 transitions. [2021-03-10 21:50:03,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:03,225 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1138 transitions. [2021-03-10 21:50:03,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:03,225 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:03,225 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:03,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-03-10 21:50:03,426 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:03,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:03,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1629761644, now seen corresponding path program 17 times [2021-03-10 21:50:03,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:03,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951427755] [2021-03-10 21:50:03,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:50:03,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951427755] [2021-03-10 21:50:03,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402751018] [2021-03-10 21:50:03,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:50:03,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:50:03,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:03,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:03,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:03,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:03,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:03,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:03,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:03,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:03,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:03,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:03,749 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:03,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:03,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:03,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:03,753 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:03,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:03,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:03,757 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:03,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:03,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:03,844 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-03-10 21:50:04,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:04,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:04,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:50:04,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:04,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:04,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:50:04,202 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:04,238 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-03-10 21:50:04,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:04,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:04,243 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:04,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:04,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:50:04,255 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:99, output treesize:12 [2021-03-10 21:50:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:50:04,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:04,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:50:04,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95624726] [2021-03-10 21:50:04,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:50:04,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:04,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:50:04,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:04,304 INFO L87 Difference]: Start difference. First operand 391 states and 1138 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:05,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:05,047 INFO L93 Difference]: Finished difference Result 589 states and 1680 transitions. [2021-03-10 21:50:05,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:50:05,047 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:05,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:05,049 INFO L225 Difference]: With dead ends: 589 [2021-03-10 21:50:05,049 INFO L226 Difference]: Without dead ends: 534 [2021-03-10 21:50:05,049 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 758.0ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:50:05,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-03-10 21:50:05,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 386. [2021-03-10 21:50:05,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.909090909090909) internal successors, (1120), 385 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:05,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1120 transitions. [2021-03-10 21:50:05,056 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1120 transitions. Word has length 24 [2021-03-10 21:50:05,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:05,056 INFO L480 AbstractCegarLoop]: Abstraction has 386 states and 1120 transitions. [2021-03-10 21:50:05,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:05,056 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1120 transitions. [2021-03-10 21:50:05,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:05,057 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:05,057 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:05,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-03-10 21:50:05,272 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:05,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:05,272 INFO L82 PathProgramCache]: Analyzing trace with hash 631569172, now seen corresponding path program 18 times [2021-03-10 21:50:05,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:05,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869595165] [2021-03-10 21:50:05,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:05,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869595165] [2021-03-10 21:50:05,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600020693] [2021-03-10 21:50:05,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:05,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:50:05,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:05,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:50:05,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:05,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:05,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:05,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:05,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:05,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:05,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:05,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:05,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:05,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-03-10 21:50:05,616 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:77, output treesize:63 [2021-03-10 21:50:05,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:05,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:05,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:05,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:05,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:05,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:05,798 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:05,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:05,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:05,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:05,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:05,836 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:05,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:05,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:05,840 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:05,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:05,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:50:05,872 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:93, output treesize:31 [2021-03-10 21:50:05,988 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:05,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:05,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:50:05,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111504880] [2021-03-10 21:50:05,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:50:05,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:05,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:50:05,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:05,989 INFO L87 Difference]: Start difference. First operand 386 states and 1120 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:06,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:06,868 INFO L93 Difference]: Finished difference Result 597 states and 1736 transitions. [2021-03-10 21:50:06,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:50:06,868 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:06,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:06,870 INFO L225 Difference]: With dead ends: 597 [2021-03-10 21:50:06,870 INFO L226 Difference]: Without dead ends: 566 [2021-03-10 21:50:06,870 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 944.3ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:50:06,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-03-10 21:50:06,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 393. [2021-03-10 21:50:06,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.9464285714285716) internal successors, (1155), 392 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:06,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1155 transitions. [2021-03-10 21:50:06,876 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1155 transitions. Word has length 24 [2021-03-10 21:50:06,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:06,876 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 1155 transitions. [2021-03-10 21:50:06,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:06,876 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1155 transitions. [2021-03-10 21:50:06,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:06,877 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:06,877 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:07,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-03-10 21:50:07,091 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:07,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:07,091 INFO L82 PathProgramCache]: Analyzing trace with hash 457677002, now seen corresponding path program 19 times [2021-03-10 21:50:07,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:07,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270342415] [2021-03-10 21:50:07,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:07,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270342415] [2021-03-10 21:50:07,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079040718] [2021-03-10 21:50:07,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:07,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:07,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:07,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:07,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:07,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:07,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:07,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:07,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:07,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:07,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:07,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:07,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:07,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:07,497 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:07,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:07,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:07,512 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:07,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:07,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:07,579 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-03-10 21:50:07,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:07,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:07,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:07,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:07,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:07,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:07,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:08,074 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 92 [2021-03-10 21:50:08,075 INFO L628 ElimStorePlain]: treesize reduction 179, result has 56.4 percent of original size [2021-03-10 21:50:08,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:08,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:08,081 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:08,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:08,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:08,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:08,186 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:08,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:08,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:08,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:08,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:08,288 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:08,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:50:08,293 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:08,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:08,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:08,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:50:08,393 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:08,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:08,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:08,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:08,489 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:08,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:08,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:50:08,594 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:08,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:08,681 INFO L518 ElimStorePlain]: Eliminatee v_prenex_48 vanished before elimination [2021-03-10 21:50:08,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:50:08,684 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:425, output treesize:108 [2021-03-10 21:50:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:08,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:08,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:50:08,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890468021] [2021-03-10 21:50:08,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:50:08,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:08,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:50:08,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:08,860 INFO L87 Difference]: Start difference. First operand 393 states and 1155 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:09,286 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2021-03-10 21:50:10,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:10,123 INFO L93 Difference]: Finished difference Result 947 states and 2611 transitions. [2021-03-10 21:50:10,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:50:10,123 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:10,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:10,126 INFO L225 Difference]: With dead ends: 947 [2021-03-10 21:50:10,126 INFO L226 Difference]: Without dead ends: 840 [2021-03-10 21:50:10,126 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1352.8ms TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:50:10,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-03-10 21:50:10,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 411. [2021-03-10 21:50:10,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.995121951219512) internal successors, (1228), 410 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:10,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1228 transitions. [2021-03-10 21:50:10,133 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1228 transitions. Word has length 24 [2021-03-10 21:50:10,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:10,133 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 1228 transitions. [2021-03-10 21:50:10,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:10,134 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1228 transitions. [2021-03-10 21:50:10,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:10,134 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:10,134 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:10,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:10,350 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:10,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:10,350 INFO L82 PathProgramCache]: Analyzing trace with hash -2027904628, now seen corresponding path program 20 times [2021-03-10 21:50:10,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:10,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265654767] [2021-03-10 21:50:10,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:10,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265654767] [2021-03-10 21:50:10,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676868985] [2021-03-10 21:50:10,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:10,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:50:10,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:10,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:50:10,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:10,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:10,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:10,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:10,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:10,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:10,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:10,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:10,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:10,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:10,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:10,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:10,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:10,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:10,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:10,689 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:10,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:10,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:10,765 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-03-10 21:50:10,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:10,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:10,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:11,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:11,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:11,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:11,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:11,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:11,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:11,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:50:11,146 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:11,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:11,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:11,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:11,218 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:11,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:11,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:11,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:50:11,301 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:11,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:11,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:11,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:11,377 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:11,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:11,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:11,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:11,441 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:11,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:11,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:11,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:50:11,502 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:11,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:11,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:50:11,560 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:193, output treesize:78 [2021-03-10 21:50:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:11,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:11,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:50:11,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503466057] [2021-03-10 21:50:11,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:50:11,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:11,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:50:11,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:11,696 INFO L87 Difference]: Start difference. First operand 411 states and 1228 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:12,079 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 88 [2021-03-10 21:50:12,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:12,620 INFO L93 Difference]: Finished difference Result 690 states and 2023 transitions. [2021-03-10 21:50:12,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:50:12,620 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:12,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:12,622 INFO L225 Difference]: With dead ends: 690 [2021-03-10 21:50:12,622 INFO L226 Difference]: Without dead ends: 659 [2021-03-10 21:50:12,623 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1015.7ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:50:12,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-03-10 21:50:12,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 409. [2021-03-10 21:50:12,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.997549019607843) internal successors, (1223), 408 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:12,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1223 transitions. [2021-03-10 21:50:12,629 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1223 transitions. Word has length 24 [2021-03-10 21:50:12,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:12,629 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 1223 transitions. [2021-03-10 21:50:12,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:12,629 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1223 transitions. [2021-03-10 21:50:12,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:12,629 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:12,630 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:12,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-03-10 21:50:12,843 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:12,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:12,843 INFO L82 PathProgramCache]: Analyzing trace with hash 578433124, now seen corresponding path program 21 times [2021-03-10 21:50:12,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:12,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610488787] [2021-03-10 21:50:12,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:13,091 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:13,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610488787] [2021-03-10 21:50:13,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404998811] [2021-03-10 21:50:13,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:13,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:50:13,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:13,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:13,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:13,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:13,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:13,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-03-10 21:50:13,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:13,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:13,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:50:13,317 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:13,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:13,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-03-10 21:50:13,347 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:71 [2021-03-10 21:50:13,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:13,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:13,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:50:13,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:13,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:13,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:50:13,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:13,558 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-03-10 21:50:13,559 INFO L628 ElimStorePlain]: treesize reduction 66, result has 64.7 percent of original size [2021-03-10 21:50:13,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:13,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:13,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:13,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:13,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:50:13,567 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:13,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:13,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:13,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:13,618 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:13,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:13,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:13,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:50:13,676 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:13,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:13,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:50:13,726 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:197, output treesize:47 [2021-03-10 21:50:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:13,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:13,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:50:13,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464659145] [2021-03-10 21:50:13,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:50:13,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:13,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:50:13,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:13,813 INFO L87 Difference]: Start difference. First operand 409 states and 1223 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:14,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:14,055 INFO L93 Difference]: Finished difference Result 480 states and 1389 transitions. [2021-03-10 21:50:14,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:50:14,056 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:14,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:14,057 INFO L225 Difference]: With dead ends: 480 [2021-03-10 21:50:14,057 INFO L226 Difference]: Without dead ends: 431 [2021-03-10 21:50:14,058 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 463.7ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:50:14,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-03-10 21:50:14,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 411. [2021-03-10 21:50:14,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.995121951219512) internal successors, (1228), 410 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1228 transitions. [2021-03-10 21:50:14,063 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1228 transitions. Word has length 24 [2021-03-10 21:50:14,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:14,063 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 1228 transitions. [2021-03-10 21:50:14,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:14,063 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1228 transitions. [2021-03-10 21:50:14,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:14,064 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:14,064 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:14,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:14,265 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:14,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:14,265 INFO L82 PathProgramCache]: Analyzing trace with hash 40940268, now seen corresponding path program 22 times [2021-03-10 21:50:14,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:14,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712626895] [2021-03-10 21:50:14,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:14,542 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:14,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712626895] [2021-03-10 21:50:14,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341153754] [2021-03-10 21:50:14,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:14,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:50:14,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:14,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:14,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:14,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:14,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:14,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:14,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:14,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:14,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:14,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:14,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:14,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:50:14,765 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:91, output treesize:77 [2021-03-10 21:50:14,859 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-03-10 21:50:14,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:14,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:14,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:14,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:14,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:14,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:14,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:14,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:14,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:14,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:14,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:14,872 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:14,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:14,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:14,876 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:14,988 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 21:50:14,989 INFO L628 ElimStorePlain]: treesize reduction 57, result has 65.2 percent of original size [2021-03-10 21:50:14,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:14,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:14,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:50:14,994 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:14,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:14,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:50:15,000 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:15,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:15,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:50:15,048 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:189, output treesize:47 [2021-03-10 21:50:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:15,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:15,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:50:15,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925063999] [2021-03-10 21:50:15,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:50:15,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:15,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:50:15,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:15,139 INFO L87 Difference]: Start difference. First operand 411 states and 1228 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:15,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:15,448 INFO L93 Difference]: Finished difference Result 484 states and 1401 transitions. [2021-03-10 21:50:15,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:50:15,448 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:15,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:15,450 INFO L225 Difference]: With dead ends: 484 [2021-03-10 21:50:15,450 INFO L226 Difference]: Without dead ends: 431 [2021-03-10 21:50:15,450 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 544.7ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:50:15,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-03-10 21:50:15,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 409. [2021-03-10 21:50:15,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.997549019607843) internal successors, (1223), 408 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:15,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1223 transitions. [2021-03-10 21:50:15,456 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1223 transitions. Word has length 24 [2021-03-10 21:50:15,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:15,456 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 1223 transitions. [2021-03-10 21:50:15,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:15,456 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1223 transitions. [2021-03-10 21:50:15,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:15,456 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:15,456 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:15,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:15,669 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:15,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:15,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1427702638, now seen corresponding path program 23 times [2021-03-10 21:50:15,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:15,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366962258] [2021-03-10 21:50:15,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:15,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:15,867 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:15,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366962258] [2021-03-10 21:50:15,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64531175] [2021-03-10 21:50:15,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:15,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:50:15,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:15,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:15,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:16,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:16,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:16,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:16,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:16,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:16,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:16,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:16,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:16,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:16,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:16,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:16,040 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:16,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:16,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:16,046 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:16,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:16,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:16,121 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-03-10 21:50:16,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:16,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:16,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:16,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:16,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:16,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:16,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:16,502 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-03-10 21:50:16,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:16,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:16,506 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:16,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:16,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:50:16,517 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:91, output treesize:12 [2021-03-10 21:50:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:16,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:16,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:50:16,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580226523] [2021-03-10 21:50:16,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:50:16,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:16,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:50:16,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:16,565 INFO L87 Difference]: Start difference. First operand 409 states and 1223 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:16,866 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 55 [2021-03-10 21:50:17,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:17,214 INFO L93 Difference]: Finished difference Result 561 states and 1600 transitions. [2021-03-10 21:50:17,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:50:17,214 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:17,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:17,216 INFO L225 Difference]: With dead ends: 561 [2021-03-10 21:50:17,216 INFO L226 Difference]: Without dead ends: 475 [2021-03-10 21:50:17,216 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 737.9ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:50:17,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-03-10 21:50:17,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 428. [2021-03-10 21:50:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.0046838407494145) internal successors, (1283), 427 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:17,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1283 transitions. [2021-03-10 21:50:17,222 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1283 transitions. Word has length 24 [2021-03-10 21:50:17,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:17,222 INFO L480 AbstractCegarLoop]: Abstraction has 428 states and 1283 transitions. [2021-03-10 21:50:17,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:17,222 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1283 transitions. [2021-03-10 21:50:17,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:17,223 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:17,223 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:17,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:17,424 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:17,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:17,424 INFO L82 PathProgramCache]: Analyzing trace with hash -310269178, now seen corresponding path program 24 times [2021-03-10 21:50:17,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:17,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477359060] [2021-03-10 21:50:17,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:17,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477359060] [2021-03-10 21:50:17,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480351110] [2021-03-10 21:50:17,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:17,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:50:17,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:17,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:50:17,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:17,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:17,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:17,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:17,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:17,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:17,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:17,725 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:17,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:17,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-03-10 21:50:17,757 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-03-10 21:50:17,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:17,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:17,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:17,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:17,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:17,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:17,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:18,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:18,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:18,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:18,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:18,037 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:18,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:18,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:18,041 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:18,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:18,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:18,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:18,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:50:18,108 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:18,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:18,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:50:18,115 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:18,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:18,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:18,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:18,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:50:18,181 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:18,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:18,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:50:18,190 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:18,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:18,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:50:18,259 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:173, output treesize:57 [2021-03-10 21:50:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:18,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:18,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:18,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210223587] [2021-03-10 21:50:18,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:18,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:18,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:18,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:18,365 INFO L87 Difference]: Start difference. First operand 428 states and 1283 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:19,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:19,120 INFO L93 Difference]: Finished difference Result 649 states and 1846 transitions. [2021-03-10 21:50:19,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:50:19,120 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:19,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:19,122 INFO L225 Difference]: With dead ends: 649 [2021-03-10 21:50:19,122 INFO L226 Difference]: Without dead ends: 561 [2021-03-10 21:50:19,123 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 665.6ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:50:19,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-03-10 21:50:19,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 430. [2021-03-10 21:50:19,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.006993006993007) internal successors, (1290), 429 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:19,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1290 transitions. [2021-03-10 21:50:19,129 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1290 transitions. Word has length 24 [2021-03-10 21:50:19,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:19,129 INFO L480 AbstractCegarLoop]: Abstraction has 430 states and 1290 transitions. [2021-03-10 21:50:19,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:19,129 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1290 transitions. [2021-03-10 21:50:19,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:19,130 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:19,130 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:19,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:19,343 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:19,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:19,343 INFO L82 PathProgramCache]: Analyzing trace with hash -90973202, now seen corresponding path program 25 times [2021-03-10 21:50:19,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:19,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967283246] [2021-03-10 21:50:19,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:50:19,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967283246] [2021-03-10 21:50:19,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599197115] [2021-03-10 21:50:19,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:19,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:19,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:19,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:19,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:19,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:19,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:19,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:19,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:19,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:19,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:19,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:19,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:19,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:19,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:19,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:19,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:19,709 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:19,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:19,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:19,799 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-03-10 21:50:20,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:20,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:20,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:50:20,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:20,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:20,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:50:20,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:20,100 INFO L628 ElimStorePlain]: treesize reduction 43, result has 48.2 percent of original size [2021-03-10 21:50:20,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:20,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:50:20,103 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:20,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:20,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:50:20,113 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:99, output treesize:12 [2021-03-10 21:50:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:50:20,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:20,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:20,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860946714] [2021-03-10 21:50:20,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:20,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:20,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:20,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:20,149 INFO L87 Difference]: Start difference. First operand 430 states and 1290 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:20,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:20,460 INFO L93 Difference]: Finished difference Result 498 states and 1434 transitions. [2021-03-10 21:50:20,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:50:20,460 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:20,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:20,461 INFO L225 Difference]: With dead ends: 498 [2021-03-10 21:50:20,461 INFO L226 Difference]: Without dead ends: 435 [2021-03-10 21:50:20,462 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 419.3ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:20,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-03-10 21:50:20,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 417. [2021-03-10 21:50:20,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 3.0) internal successors, (1248), 416 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:20,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1248 transitions. [2021-03-10 21:50:20,467 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1248 transitions. Word has length 24 [2021-03-10 21:50:20,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:20,467 INFO L480 AbstractCegarLoop]: Abstraction has 417 states and 1248 transitions. [2021-03-10 21:50:20,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:20,467 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1248 transitions. [2021-03-10 21:50:20,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:20,468 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:20,468 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:20,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-03-10 21:50:20,671 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:20,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:20,672 INFO L82 PathProgramCache]: Analyzing trace with hash -2124609682, now seen corresponding path program 26 times [2021-03-10 21:50:20,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:20,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359771712] [2021-03-10 21:50:20,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:20,918 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:20,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359771712] [2021-03-10 21:50:20,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106503394] [2021-03-10 21:50:20,919 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 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 [2021-03-10 21:50:20,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:50:20,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:20,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:50:20,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:21,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:21,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:21,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:21,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:21,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:21,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:21,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:21,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:21,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:21,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:21,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:21,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:21,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:21,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:21,102 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:21,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:21,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:21,180 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-03-10 21:50:21,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:21,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:21,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:21,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:21,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:21,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:21,459 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:21,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:21,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:21,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:21,499 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:21,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:21,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:21,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:50:21,536 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:21,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:21,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:50:21,567 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:93, output treesize:31 [2021-03-10 21:50:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:21,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:21,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:50:21,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493012390] [2021-03-10 21:50:21,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:50:21,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:21,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:50:21,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:21,653 INFO L87 Difference]: Start difference. First operand 417 states and 1248 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:22,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:22,184 INFO L93 Difference]: Finished difference Result 602 states and 1738 transitions. [2021-03-10 21:50:22,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:50:22,184 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:22,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:22,185 INFO L225 Difference]: With dead ends: 602 [2021-03-10 21:50:22,185 INFO L226 Difference]: Without dead ends: 525 [2021-03-10 21:50:22,186 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 649.5ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:50:22,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-03-10 21:50:22,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 431. [2021-03-10 21:50:22,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.0488372093023255) internal successors, (1311), 430 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:22,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1311 transitions. [2021-03-10 21:50:22,192 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1311 transitions. Word has length 24 [2021-03-10 21:50:22,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:22,192 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 1311 transitions. [2021-03-10 21:50:22,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:22,192 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1311 transitions. [2021-03-10 21:50:22,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:22,192 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:22,192 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:22,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-03-10 21:50:22,401 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:22,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:22,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1996465444, now seen corresponding path program 27 times [2021-03-10 21:50:22,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:22,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850519884] [2021-03-10 21:50:22,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:22,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:22,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850519884] [2021-03-10 21:50:22,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454061696] [2021-03-10 21:50:22,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:22,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:50:22,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:22,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:50:22,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:22,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:22,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:22,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:22,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:22,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:22,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:22,762 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:22,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:22,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-03-10 21:50:22,794 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-03-10 21:50:22,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:22,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:22,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:22,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:22,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:22,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:22,873 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:22,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:22,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:22,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:22,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:22,957 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:22,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:22,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:22,961 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:23,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:23,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:23,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:23,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:23,042 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:23,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:23,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:23,046 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:23,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:23,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:23,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:23,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:50:23,122 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:23,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:23,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:50:23,127 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:23,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:23,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:50:23,200 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:193, output treesize:81 [2021-03-10 21:50:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:23,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:23,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:50:23,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763791543] [2021-03-10 21:50:23,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:50:23,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:23,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:50:23,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:23,364 INFO L87 Difference]: Start difference. First operand 431 states and 1311 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:24,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:24,080 INFO L93 Difference]: Finished difference Result 714 states and 2024 transitions. [2021-03-10 21:50:24,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:50:24,080 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:24,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:24,081 INFO L225 Difference]: With dead ends: 714 [2021-03-10 21:50:24,081 INFO L226 Difference]: Without dead ends: 621 [2021-03-10 21:50:24,082 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 818.6ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:50:24,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-03-10 21:50:24,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 434. [2021-03-10 21:50:24,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.0508083140877598) internal successors, (1321), 433 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:24,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1321 transitions. [2021-03-10 21:50:24,088 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1321 transitions. Word has length 24 [2021-03-10 21:50:24,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:24,088 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 1321 transitions. [2021-03-10 21:50:24,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:24,088 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1321 transitions. [2021-03-10 21:50:24,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:24,089 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:24,089 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:24,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-03-10 21:50:24,299 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:24,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:24,299 INFO L82 PathProgramCache]: Analyzing trace with hash -489116186, now seen corresponding path program 28 times [2021-03-10 21:50:24,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:24,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21771726] [2021-03-10 21:50:24,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:24,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21771726] [2021-03-10 21:50:24,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685739743] [2021-03-10 21:50:24,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:24,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:50:24,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:24,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:24,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:24,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:24,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:24,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:24,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:24,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:24,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:24,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:24,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:24,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:24,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:24,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:24,750 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:24,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:24,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:24,754 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:24,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:24,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:24,831 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-03-10 21:50:24,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:24,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:24,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:24,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:24,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:24,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:24,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:25,248 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 90 [2021-03-10 21:50:25,248 INFO L628 ElimStorePlain]: treesize reduction 175, result has 57.4 percent of original size [2021-03-10 21:50:25,248 INFO L518 ElimStorePlain]: Eliminatee v_prenex_108 vanished before elimination [2021-03-10 21:50:25,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:25,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:25,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:25,254 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:25,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:25,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:25,260 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:25,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:25,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:25,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:25,364 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:25,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:25,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:25,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:25,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:50:25,470 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:25,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:25,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:50:25,476 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:25,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:25,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:25,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:25,577 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:25,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:25,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:25,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:25,672 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:25,780 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-10 21:50:25,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:25,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:25,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:25,786 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:25,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:25,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:50:25,875 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:425, output treesize:99 [2021-03-10 21:50:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:26,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:26,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:50:26,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215725275] [2021-03-10 21:50:26,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:50:26,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:26,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:50:26,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:26,037 INFO L87 Difference]: Start difference. First operand 434 states and 1321 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:26,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:26,547 INFO L93 Difference]: Finished difference Result 839 states and 2390 transitions. [2021-03-10 21:50:26,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:50:26,547 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:26,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:26,549 INFO L225 Difference]: With dead ends: 839 [2021-03-10 21:50:26,549 INFO L226 Difference]: Without dead ends: 736 [2021-03-10 21:50:26,549 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 691.5ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:50:26,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-03-10 21:50:26,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 439. [2021-03-10 21:50:26,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 3.0525114155251143) internal successors, (1337), 438 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:26,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1337 transitions. [2021-03-10 21:50:26,557 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1337 transitions. Word has length 24 [2021-03-10 21:50:26,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:26,557 INFO L480 AbstractCegarLoop]: Abstraction has 439 states and 1337 transitions. [2021-03-10 21:50:26,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:26,557 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1337 transitions. [2021-03-10 21:50:26,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:26,558 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:26,558 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:26,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:26,771 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:26,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:26,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1464730482, now seen corresponding path program 29 times [2021-03-10 21:50:26,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:26,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964677542] [2021-03-10 21:50:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:26,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:26,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964677542] [2021-03-10 21:50:26,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629579453] [2021-03-10 21:50:26,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:26,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:50:26,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:26,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:26,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:27,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:27,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:27,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:27,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:27,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:27,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:27,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:27,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:27,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:27,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:27,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:27,186 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:27,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:27,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:27,190 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:27,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:27,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:27,270 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-03-10 21:50:27,487 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-03-10 21:50:27,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:27,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:27,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:27,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:27,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:27,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:27,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:27,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:27,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:27,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:27,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:27,502 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:27,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:27,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:27,506 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:27,615 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-03-10 21:50:27,616 INFO L628 ElimStorePlain]: treesize reduction 57, result has 65.0 percent of original size [2021-03-10 21:50:27,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:27,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:27,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:50:27,621 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:27,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:27,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:27,626 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:27,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:27,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:50:27,672 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:189, output treesize:47 [2021-03-10 21:50:27,755 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:27,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:27,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:27,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845191359] [2021-03-10 21:50:27,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:27,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:27,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:27,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:27,756 INFO L87 Difference]: Start difference. First operand 439 states and 1337 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:28,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:28,206 INFO L93 Difference]: Finished difference Result 515 states and 1522 transitions. [2021-03-10 21:50:28,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:50:28,206 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:28,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:28,207 INFO L225 Difference]: With dead ends: 515 [2021-03-10 21:50:28,207 INFO L226 Difference]: Without dead ends: 462 [2021-03-10 21:50:28,208 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 583.5ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:50:28,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-03-10 21:50:28,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 442. [2021-03-10 21:50:28,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.054421768707483) internal successors, (1347), 441 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:28,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1347 transitions. [2021-03-10 21:50:28,213 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1347 transitions. Word has length 24 [2021-03-10 21:50:28,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:28,213 INFO L480 AbstractCegarLoop]: Abstraction has 442 states and 1347 transitions. [2021-03-10 21:50:28,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:28,214 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1347 transitions. [2021-03-10 21:50:28,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:28,214 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:28,214 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:28,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-03-10 21:50:28,419 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:28,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:28,419 INFO L82 PathProgramCache]: Analyzing trace with hash 861906348, now seen corresponding path program 30 times [2021-03-10 21:50:28,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:28,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669449181] [2021-03-10 21:50:28,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:28,628 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:28,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669449181] [2021-03-10 21:50:28,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035211506] [2021-03-10 21:50:28,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:28,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:50:28,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:28,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:50:28,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:28,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:28,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:28,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:28,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:28,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:28,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:28,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:28,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:28,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:50:28,758 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:93, output treesize:79 [2021-03-10 21:50:28,844 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-03-10 21:50:28,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:28,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:28,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:28,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:28,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:28,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:28,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:28,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:28,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:28,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:28,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:28,861 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:28,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:28,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:28,865 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:28,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:28,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:28,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:28,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:50:28,942 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:28,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:28,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:28,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:50:28,947 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:28,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:28,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:28,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:50:28,953 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:28,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:28,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:28,965 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:29,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:29,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:50:29,035 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:75 [2021-03-10 21:50:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:29,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:29,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:29,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687354259] [2021-03-10 21:50:29,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:29,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:29,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:29,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:29,198 INFO L87 Difference]: Start difference. First operand 442 states and 1347 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:30,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:30,031 INFO L93 Difference]: Finished difference Result 639 states and 1871 transitions. [2021-03-10 21:50:30,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:50:30,032 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:30,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:30,033 INFO L225 Difference]: With dead ends: 639 [2021-03-10 21:50:30,033 INFO L226 Difference]: Without dead ends: 551 [2021-03-10 21:50:30,033 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 846.3ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:50:30,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-03-10 21:50:30,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 463. [2021-03-10 21:50:30,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.0714285714285716) internal successors, (1419), 462 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:30,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1419 transitions. [2021-03-10 21:50:30,040 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1419 transitions. Word has length 24 [2021-03-10 21:50:30,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:30,040 INFO L480 AbstractCegarLoop]: Abstraction has 463 states and 1419 transitions. [2021-03-10 21:50:30,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:30,040 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1419 transitions. [2021-03-10 21:50:30,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:30,040 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:30,040 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:30,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-03-10 21:50:30,247 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:30,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:30,247 INFO L82 PathProgramCache]: Analyzing trace with hash -18367188, now seen corresponding path program 31 times [2021-03-10 21:50:30,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:30,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386360116] [2021-03-10 21:50:30,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:30,525 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:50:30,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386360116] [2021-03-10 21:50:30,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898542076] [2021-03-10 21:50:30,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:30,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:30,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:30,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:30,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:30,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:30,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:30,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:30,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:30,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:30,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:30,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:30,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:30,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:30,791 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:30,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:30,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:30,795 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:30,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:30,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:30,874 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-03-10 21:50:31,049 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-03-10 21:50:31,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:31,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:31,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:31,061 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:31,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:31,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:31,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:31,072 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:31,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:31,078 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:31,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:31,084 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:31,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:31,091 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:31,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:31,096 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:31,320 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2021-03-10 21:50:31,321 INFO L628 ElimStorePlain]: treesize reduction 165, result has 56.0 percent of original size [2021-03-10 21:50:31,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:50:31,328 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:31,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:31,334 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:31,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:31,341 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:31,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:31,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:50:31,347 INFO L550 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:31,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:31,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:50:31,459 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:425, output treesize:102 [2021-03-10 21:50:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:50:31,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:31,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:50:31,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998246661] [2021-03-10 21:50:31,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:50:31,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:31,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:50:31,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:31,628 INFO L87 Difference]: Start difference. First operand 463 states and 1419 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:32,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:32,444 INFO L93 Difference]: Finished difference Result 823 states and 2368 transitions. [2021-03-10 21:50:32,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:50:32,444 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:32,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:32,445 INFO L225 Difference]: With dead ends: 823 [2021-03-10 21:50:32,446 INFO L226 Difference]: Without dead ends: 709 [2021-03-10 21:50:32,446 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 970.6ms TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:50:32,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-03-10 21:50:32,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 441. [2021-03-10 21:50:32,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 3.0613636363636365) internal successors, (1347), 440 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:32,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1347 transitions. [2021-03-10 21:50:32,454 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1347 transitions. Word has length 24 [2021-03-10 21:50:32,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:32,454 INFO L480 AbstractCegarLoop]: Abstraction has 441 states and 1347 transitions. [2021-03-10 21:50:32,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:32,454 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1347 transitions. [2021-03-10 21:50:32,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:32,455 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:32,455 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:32,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:32,655 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:32,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:32,656 INFO L82 PathProgramCache]: Analyzing trace with hash 2121799196, now seen corresponding path program 32 times [2021-03-10 21:50:32,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:32,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024058640] [2021-03-10 21:50:32,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:32,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024058640] [2021-03-10 21:50:32,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525628526] [2021-03-10 21:50:32,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:32,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:50:32,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:32,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:50:32,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:32,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:32,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:32,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:32,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:32,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:32,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:32,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:32,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:32,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:50:32,917 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:47 [2021-03-10 21:50:33,086 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-03-10 21:50:33,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:33,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:33,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:33,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:33,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:33,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:33,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:33,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:33,117 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:33,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:33,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:33,121 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:33,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:33,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:50:33,140 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:25 [2021-03-10 21:50:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:33,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:33,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:50:33,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929556965] [2021-03-10 21:50:33,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:50:33,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:33,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:50:33,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:33,195 INFO L87 Difference]: Start difference. First operand 441 states and 1347 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:34,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:34,329 INFO L93 Difference]: Finished difference Result 927 states and 2699 transitions. [2021-03-10 21:50:34,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:50:34,329 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:34,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:34,331 INFO L225 Difference]: With dead ends: 927 [2021-03-10 21:50:34,331 INFO L226 Difference]: Without dead ends: 827 [2021-03-10 21:50:34,331 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 970.2ms TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:50:34,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-03-10 21:50:34,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 473. [2021-03-10 21:50:34,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.0572033898305087) internal successors, (1443), 472 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1443 transitions. [2021-03-10 21:50:34,338 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1443 transitions. Word has length 24 [2021-03-10 21:50:34,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:34,338 INFO L480 AbstractCegarLoop]: Abstraction has 473 states and 1443 transitions. [2021-03-10 21:50:34,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:34,338 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1443 transitions. [2021-03-10 21:50:34,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:34,339 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:34,339 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:34,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-03-10 21:50:34,547 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:34,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:34,547 INFO L82 PathProgramCache]: Analyzing trace with hash 19538978, now seen corresponding path program 33 times [2021-03-10 21:50:34,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:34,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480441460] [2021-03-10 21:50:34,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:34,716 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:34,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480441460] [2021-03-10 21:50:34,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369876636] [2021-03-10 21:50:34,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:34,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:50:34,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:34,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:34,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:34,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:34,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:34,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:34,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:34,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:34,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:34,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:34,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:34,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:34,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:34,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:34,800 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:34,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:34,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:34,803 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:34,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:34,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:34,846 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-03-10 21:50:35,061 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-03-10 21:50:35,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:35,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:35,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:35,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:35,100 INFO L628 ElimStorePlain]: treesize reduction 35, result has 42.6 percent of original size [2021-03-10 21:50:35,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:35,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:35,106 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:35,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:35,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:50:35,115 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:12 [2021-03-10 21:50:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:35,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:35,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:50:35,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309338473] [2021-03-10 21:50:35,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:50:35,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:35,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:50:35,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:35,154 INFO L87 Difference]: Start difference. First operand 473 states and 1443 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:35,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:35,990 INFO L93 Difference]: Finished difference Result 782 states and 2252 transitions. [2021-03-10 21:50:35,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:50:35,990 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:35,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:35,992 INFO L225 Difference]: With dead ends: 782 [2021-03-10 21:50:35,992 INFO L226 Difference]: Without dead ends: 696 [2021-03-10 21:50:35,992 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 880.1ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:50:35,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-03-10 21:50:35,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 481. [2021-03-10 21:50:35,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.0520833333333335) internal successors, (1465), 480 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:35,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1465 transitions. [2021-03-10 21:50:35,999 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1465 transitions. Word has length 24 [2021-03-10 21:50:35,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:35,999 INFO L480 AbstractCegarLoop]: Abstraction has 481 states and 1465 transitions. [2021-03-10 21:50:35,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:35,999 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1465 transitions. [2021-03-10 21:50:36,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:36,000 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:36,000 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:36,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:36,215 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:36,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:36,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1718432838, now seen corresponding path program 34 times [2021-03-10 21:50:36,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:36,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16738464] [2021-03-10 21:50:36,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:36,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16738464] [2021-03-10 21:50:36,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592431481] [2021-03-10 21:50:36,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:36,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:50:36,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:36,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:36,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:36,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:36,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:36,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:36,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:36,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:36,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:36,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:36,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:36,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:36,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:36,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:36,492 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:36,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:36,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:36,495 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:36,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:36,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:36,546 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-03-10 21:50:36,726 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_129, o_0], 1=[o_4, v_prenex_130]} [2021-03-10 21:50:36,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:36,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:36,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:36,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:36,830 INFO L628 ElimStorePlain]: treesize reduction 55, result has 61.5 percent of original size [2021-03-10 21:50:36,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:36,834 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:36,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:36,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:36,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:36,879 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:36,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:36,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:36,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:50:36,922 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:36,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:36,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:50:36,959 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:157, output treesize:47 [2021-03-10 21:50:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:37,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:37,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:37,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507719464] [2021-03-10 21:50:37,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:37,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:37,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:37,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:37,040 INFO L87 Difference]: Start difference. First operand 481 states and 1465 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:37,550 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-03-10 21:50:37,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:37,852 INFO L93 Difference]: Finished difference Result 811 states and 2316 transitions. [2021-03-10 21:50:37,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:50:37,853 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:37,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:37,854 INFO L225 Difference]: With dead ends: 811 [2021-03-10 21:50:37,854 INFO L226 Difference]: Without dead ends: 723 [2021-03-10 21:50:37,854 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 874.2ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:50:37,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-03-10 21:50:37,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 477. [2021-03-10 21:50:37,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.0651260504201683) internal successors, (1459), 476 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:37,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1459 transitions. [2021-03-10 21:50:37,861 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1459 transitions. Word has length 24 [2021-03-10 21:50:37,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:37,862 INFO L480 AbstractCegarLoop]: Abstraction has 477 states and 1459 transitions. [2021-03-10 21:50:37,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:37,862 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1459 transitions. [2021-03-10 21:50:37,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:37,862 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:37,862 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:38,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-03-10 21:50:38,075 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:38,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:38,075 INFO L82 PathProgramCache]: Analyzing trace with hash -2007478884, now seen corresponding path program 35 times [2021-03-10 21:50:38,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:38,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730817809] [2021-03-10 21:50:38,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:50:38,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730817809] [2021-03-10 21:50:38,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58476575] [2021-03-10 21:50:38,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:38,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:50:38,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:38,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:38,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:38,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:38,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:38,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:38,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:38,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:38,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:38,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:38,317 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:38,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:38,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:38,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:38,321 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:38,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:38,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:38,324 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:38,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:38,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:38,368 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-03-10 21:50:38,565 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-03-10 21:50:38,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:50:38,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:38,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:50:38,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:38,597 INFO L628 ElimStorePlain]: treesize reduction 41, result has 38.8 percent of original size [2021-03-10 21:50:38,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:38,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:38,601 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:38,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:38,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:50:38,609 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:12 [2021-03-10 21:50:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:50:38,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:38,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:50:38,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9494779] [2021-03-10 21:50:38,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:50:38,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:38,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:50:38,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:38,647 INFO L87 Difference]: Start difference. First operand 477 states and 1459 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:39,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:39,098 INFO L93 Difference]: Finished difference Result 1113 states and 3136 transitions. [2021-03-10 21:50:39,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:50:39,099 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:39,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:39,100 INFO L225 Difference]: With dead ends: 1113 [2021-03-10 21:50:39,100 INFO L226 Difference]: Without dead ends: 1009 [2021-03-10 21:50:39,101 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 519.8ms TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:50:39,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-03-10 21:50:39,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 488. [2021-03-10 21:50:39,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.0718685831622174) internal successors, (1496), 487 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:39,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1496 transitions. [2021-03-10 21:50:39,108 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1496 transitions. Word has length 24 [2021-03-10 21:50:39,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:39,108 INFO L480 AbstractCegarLoop]: Abstraction has 488 states and 1496 transitions. [2021-03-10 21:50:39,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:39,108 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1496 transitions. [2021-03-10 21:50:39,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:39,109 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:39,109 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:39,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-03-10 21:50:39,309 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:39,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:39,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1313623516, now seen corresponding path program 36 times [2021-03-10 21:50:39,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:39,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831110119] [2021-03-10 21:50:39,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:39,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831110119] [2021-03-10 21:50:39,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691547560] [2021-03-10 21:50:39,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:39,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:50:39,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:39,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:39,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:39,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:39,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:39,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:39,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:39,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:39,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:39,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:39,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:39,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:39,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:39,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:39,584 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:39,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:39,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:39,587 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:39,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:39,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:39,631 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-03-10 21:50:39,875 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-03-10 21:50:39,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:39,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:39,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:39,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:39,907 INFO L628 ElimStorePlain]: treesize reduction 35, result has 42.6 percent of original size [2021-03-10 21:50:39,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:39,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:39,910 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:39,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:39,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:50:39,919 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:12 [2021-03-10 21:50:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:39,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:39,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:50:39,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863470666] [2021-03-10 21:50:39,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:50:39,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:39,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:50:39,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:39,959 INFO L87 Difference]: Start difference. First operand 488 states and 1496 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:40,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:40,650 INFO L93 Difference]: Finished difference Result 1059 states and 3088 transitions. [2021-03-10 21:50:40,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:50:40,650 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:40,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:40,652 INFO L225 Difference]: With dead ends: 1059 [2021-03-10 21:50:40,652 INFO L226 Difference]: Without dead ends: 927 [2021-03-10 21:50:40,652 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 662.5ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:50:40,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-03-10 21:50:40,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 496. [2021-03-10 21:50:40,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 3.0868686868686868) internal successors, (1528), 495 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:40,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1528 transitions. [2021-03-10 21:50:40,661 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1528 transitions. Word has length 24 [2021-03-10 21:50:40,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:40,661 INFO L480 AbstractCegarLoop]: Abstraction has 496 states and 1528 transitions. [2021-03-10 21:50:40,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:40,661 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1528 transitions. [2021-03-10 21:50:40,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:40,662 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:40,662 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:40,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:40,867 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:40,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:40,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1331889660, now seen corresponding path program 37 times [2021-03-10 21:50:40,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:40,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761282144] [2021-03-10 21:50:40,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:41,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761282144] [2021-03-10 21:50:41,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443956712] [2021-03-10 21:50:41,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:50:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:41,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:41,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:41,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:41,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:41,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:41,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:41,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:41,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:41,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:41,200 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:41,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:41,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:41,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:41,205 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:41,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:41,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:41,209 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:41,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:41,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:41,273 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-03-10 21:50:41,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:41,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:41,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:50:41,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:41,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:41,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:50:41,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:41,683 INFO L628 ElimStorePlain]: treesize reduction 44, result has 39.7 percent of original size [2021-03-10 21:50:41,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:41,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:41,687 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:41,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:41,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:50:41,697 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:89, output treesize:12 [2021-03-10 21:50:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:41,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:41,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:41,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287279687] [2021-03-10 21:50:41,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:41,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:41,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:41,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:41,740 INFO L87 Difference]: Start difference. First operand 496 states and 1528 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:42,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:42,349 INFO L93 Difference]: Finished difference Result 812 states and 2366 transitions. [2021-03-10 21:50:42,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:50:42,350 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:42,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:42,351 INFO L225 Difference]: With dead ends: 812 [2021-03-10 21:50:42,351 INFO L226 Difference]: Without dead ends: 721 [2021-03-10 21:50:42,351 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 703.3ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:50:42,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-03-10 21:50:42,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 509. [2021-03-10 21:50:42,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 3.076771653543307) internal successors, (1563), 508 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:42,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1563 transitions. [2021-03-10 21:50:42,358 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1563 transitions. Word has length 24 [2021-03-10 21:50:42,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:42,358 INFO L480 AbstractCegarLoop]: Abstraction has 509 states and 1563 transitions. [2021-03-10 21:50:42,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:42,358 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1563 transitions. [2021-03-10 21:50:42,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:42,359 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:42,359 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:42,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-03-10 21:50:42,559 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:42,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:42,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1225105820, now seen corresponding path program 38 times [2021-03-10 21:50:42,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:42,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069413299] [2021-03-10 21:50:42,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:42,837 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:42,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069413299] [2021-03-10 21:50:42,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634119837] [2021-03-10 21:50:42,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:42,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:50:42,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:42,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:42,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:42,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:42,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:42,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:42,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:42,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:42,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:42,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:42,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:42,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:42,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:42,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:42,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:42,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:42,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:42,949 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:43,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:43,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:43,011 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-03-10 21:50:43,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:43,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:43,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:43,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:43,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:43,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:43,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:43,454 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-10 21:50:43,454 INFO L628 ElimStorePlain]: treesize reduction 49, result has 68.4 percent of original size [2021-03-10 21:50:43,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:43,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:43,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:43,460 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:43,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:50:43,463 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:43,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:43,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:43,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:43,511 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:43,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:43,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:43,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:50:43,559 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:43,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:43,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:50:43,600 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:169, output treesize:47 [2021-03-10 21:50:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:43,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:43,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:50:43,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030100862] [2021-03-10 21:50:43,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:50:43,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:43,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:50:43,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:43,700 INFO L87 Difference]: Start difference. First operand 509 states and 1563 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:44,073 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-03-10 21:50:44,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:44,854 INFO L93 Difference]: Finished difference Result 1005 states and 2914 transitions. [2021-03-10 21:50:44,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:50:44,855 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:44,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:44,856 INFO L225 Difference]: With dead ends: 1005 [2021-03-10 21:50:44,856 INFO L226 Difference]: Without dead ends: 925 [2021-03-10 21:50:44,857 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1182.2ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:50:44,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-03-10 21:50:44,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 510. [2021-03-10 21:50:44,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 3.0805500982318272) internal successors, (1568), 509 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:44,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1568 transitions. [2021-03-10 21:50:44,864 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1568 transitions. Word has length 24 [2021-03-10 21:50:44,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:44,864 INFO L480 AbstractCegarLoop]: Abstraction has 510 states and 1568 transitions. [2021-03-10 21:50:44,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:44,864 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1568 transitions. [2021-03-10 21:50:44,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:44,865 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:44,865 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:45,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:45,066 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:45,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:45,066 INFO L82 PathProgramCache]: Analyzing trace with hash 731352034, now seen corresponding path program 39 times [2021-03-10 21:50:45,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:45,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244300066] [2021-03-10 21:50:45,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:45,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244300066] [2021-03-10 21:50:45,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627400118] [2021-03-10 21:50:45,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:45,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:50:45,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:45,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:50:45,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:45,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:45,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:45,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:45,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:45,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:45,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:45,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:45,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:45,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:45,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:45,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:45,500 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:45,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:45,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:45,504 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:45,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:45,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:45,564 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-03-10 21:50:45,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:45,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:45,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:45,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:45,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:45,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:45,874 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:45,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:45,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:50:45,883 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:35, output treesize:11 [2021-03-10 21:50:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:45,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:45,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:50:45,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184645994] [2021-03-10 21:50:45,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:50:45,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:45,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:50:45,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:45,932 INFO L87 Difference]: Start difference. First operand 510 states and 1568 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:46,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:46,642 INFO L93 Difference]: Finished difference Result 918 states and 2685 transitions. [2021-03-10 21:50:46,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:50:46,642 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:46,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:46,644 INFO L225 Difference]: With dead ends: 918 [2021-03-10 21:50:46,644 INFO L226 Difference]: Without dead ends: 860 [2021-03-10 21:50:46,644 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 880.6ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:50:46,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-03-10 21:50:46,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 511. [2021-03-10 21:50:46,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 3.0823529411764707) internal successors, (1572), 510 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:46,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1572 transitions. [2021-03-10 21:50:46,652 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1572 transitions. Word has length 24 [2021-03-10 21:50:46,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:46,652 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 1572 transitions. [2021-03-10 21:50:46,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:46,652 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1572 transitions. [2021-03-10 21:50:46,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:46,653 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:46,653 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:46,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-03-10 21:50:46,863 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:46,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:46,864 INFO L82 PathProgramCache]: Analyzing trace with hash -589234684, now seen corresponding path program 40 times [2021-03-10 21:50:46,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:46,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939271917] [2021-03-10 21:50:46,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:46,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:47,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939271917] [2021-03-10 21:50:47,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275708918] [2021-03-10 21:50:47,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:50:47,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:50:47,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:47,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:47,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:47,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:47,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:47,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:47,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:47,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:47,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:47,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:47,152 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:47,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:47,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:47,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:47,156 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:47,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:47,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:47,160 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:47,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:47,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:47,222 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-03-10 21:50:47,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:47,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:47,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:47,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:47,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:47,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:47,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:47,675 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-03-10 21:50:47,675 INFO L628 ElimStorePlain]: treesize reduction 100, result has 41.5 percent of original size [2021-03-10 21:50:47,675 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:50:47,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:47,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:47,679 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:47,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:47,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:47,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:47,713 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:47,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:47,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:50:47,741 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:185, output treesize:34 [2021-03-10 21:50:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:47,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:47,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:47,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386083885] [2021-03-10 21:50:47,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:47,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:47,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:47,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:47,817 INFO L87 Difference]: Start difference. First operand 511 states and 1572 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:48,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:48,505 INFO L93 Difference]: Finished difference Result 987 states and 2880 transitions. [2021-03-10 21:50:48,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:50:48,506 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:48,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:48,508 INFO L225 Difference]: With dead ends: 987 [2021-03-10 21:50:48,508 INFO L226 Difference]: Without dead ends: 873 [2021-03-10 21:50:48,508 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 730.5ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:50:48,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-03-10 21:50:48,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 530. [2021-03-10 21:50:48,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.1020793950850662) internal successors, (1641), 529 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1641 transitions. [2021-03-10 21:50:48,515 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1641 transitions. Word has length 24 [2021-03-10 21:50:48,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:48,515 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 1641 transitions. [2021-03-10 21:50:48,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:48,515 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1641 transitions. [2021-03-10 21:50:48,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:48,516 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:48,516 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:48,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:48,717 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:48,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:48,717 INFO L82 PathProgramCache]: Analyzing trace with hash 2045366020, now seen corresponding path program 41 times [2021-03-10 21:50:48,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:48,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830071211] [2021-03-10 21:50:48,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:48,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830071211] [2021-03-10 21:50:48,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254235989] [2021-03-10 21:50:48,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:48,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:50:48,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:48,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:48,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:49,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:49,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:49,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:49,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:49,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:49,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:49,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:49,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:49,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:49,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:49,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:49,042 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:49,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:49,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:49,046 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:49,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:49,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:49,106 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-03-10 21:50:49,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:49,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:49,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:49,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:49,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:49,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:49,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:49,605 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2021-03-10 21:50:49,606 INFO L628 ElimStorePlain]: treesize reduction 166, result has 55.3 percent of original size [2021-03-10 21:50:49,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:49,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:49,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:49,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:49,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:50:49,617 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:49,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:49,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:49,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:50:49,720 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:49,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:49,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:49,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:49,822 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:49,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:49,919 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:50:49,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:49,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:49,925 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:50,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:50,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:50,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:50,019 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:50,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:50,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:50,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:50,107 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:50,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:50,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:50:50,189 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:385, output treesize:96 [2021-03-10 21:50:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:50,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:50,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:50:50,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922311172] [2021-03-10 21:50:50,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:50:50,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:50,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:50:50,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:50,375 INFO L87 Difference]: Start difference. First operand 530 states and 1641 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:50,822 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2021-03-10 21:50:51,068 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 55 [2021-03-10 21:50:51,320 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 75 [2021-03-10 21:50:51,672 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 53 [2021-03-10 21:50:51,802 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-03-10 21:50:52,089 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-03-10 21:50:52,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:52,164 INFO L93 Difference]: Finished difference Result 1116 states and 3245 transitions. [2021-03-10 21:50:52,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:50:52,165 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:52,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:52,167 INFO L225 Difference]: With dead ends: 1116 [2021-03-10 21:50:52,167 INFO L226 Difference]: Without dead ends: 1038 [2021-03-10 21:50:52,167 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1809.0ms TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:50:52,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-03-10 21:50:52,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 542. [2021-03-10 21:50:52,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1164510166358594) internal successors, (1686), 541 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:52,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1686 transitions. [2021-03-10 21:50:52,176 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1686 transitions. Word has length 24 [2021-03-10 21:50:52,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:52,176 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1686 transitions. [2021-03-10 21:50:52,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:52,176 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1686 transitions. [2021-03-10 21:50:52,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:52,177 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:52,177 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:52,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:52,393 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:52,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:52,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1623574386, now seen corresponding path program 42 times [2021-03-10 21:50:52,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:52,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010292953] [2021-03-10 21:50:52,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:52,577 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:52,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010292953] [2021-03-10 21:50:52,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987855567] [2021-03-10 21:50:52,577 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 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 [2021-03-10 21:50:52,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:50:52,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:52,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:52,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:52,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:50:52,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:52,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:50:52,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:52,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:52,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:50:52,668 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-03-10 21:50:52,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:50:52,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:52,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:50:52,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:52,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:50:52,761 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:52,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:50:52,764 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:52,815 INFO L628 ElimStorePlain]: treesize reduction 53, result has 43.0 percent of original size [2021-03-10 21:50:52,815 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:50:52,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:50:52,816 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:177, output treesize:40 [2021-03-10 21:50:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:52,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:52,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:52,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955627824] [2021-03-10 21:50:52,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:52,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:52,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:52,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:52,906 INFO L87 Difference]: Start difference. First operand 542 states and 1686 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:53,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:53,379 INFO L93 Difference]: Finished difference Result 922 states and 2675 transitions. [2021-03-10 21:50:53,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:50:53,379 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:53,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:53,380 INFO L225 Difference]: With dead ends: 922 [2021-03-10 21:50:53,381 INFO L226 Difference]: Without dead ends: 802 [2021-03-10 21:50:53,381 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 524.7ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:50:53,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-03-10 21:50:53,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 503. [2021-03-10 21:50:53,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 3.095617529880478) internal successors, (1554), 502 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:53,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1554 transitions. [2021-03-10 21:50:53,387 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1554 transitions. Word has length 24 [2021-03-10 21:50:53,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:53,387 INFO L480 AbstractCegarLoop]: Abstraction has 503 states and 1554 transitions. [2021-03-10 21:50:53,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:53,388 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1554 transitions. [2021-03-10 21:50:53,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:53,388 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:53,388 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:53,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:53,589 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:53,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:53,589 INFO L82 PathProgramCache]: Analyzing trace with hash 242494626, now seen corresponding path program 43 times [2021-03-10 21:50:53,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:53,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973033171] [2021-03-10 21:50:53,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:53,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973033171] [2021-03-10 21:50:53,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182207901] [2021-03-10 21:50:53,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:50:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:53,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:53,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:53,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:50:53,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:53,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:50:53,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:53,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:53,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:50:53,914 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-03-10 21:50:53,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:50:53,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:53,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:50:53,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:54,019 INFO L628 ElimStorePlain]: treesize reduction 24, result has 38.5 percent of original size [2021-03-10 21:50:54,020 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:50:54,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:50:54,021 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:15 [2021-03-10 21:50:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:54,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:54,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:50:54,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852682780] [2021-03-10 21:50:54,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:50:54,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:54,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:50:54,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:50:54,065 INFO L87 Difference]: Start difference. First operand 503 states and 1554 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:54,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:54,244 INFO L93 Difference]: Finished difference Result 613 states and 1843 transitions. [2021-03-10 21:50:54,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:50:54,245 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:54,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:54,246 INFO L225 Difference]: With dead ends: 613 [2021-03-10 21:50:54,246 INFO L226 Difference]: Without dead ends: 554 [2021-03-10 21:50:54,246 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 336.6ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:54,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-03-10 21:50:54,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 517. [2021-03-10 21:50:54,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 3.0930232558139537) internal successors, (1596), 516 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:54,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1596 transitions. [2021-03-10 21:50:54,252 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1596 transitions. Word has length 24 [2021-03-10 21:50:54,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:54,253 INFO L480 AbstractCegarLoop]: Abstraction has 517 states and 1596 transitions. [2021-03-10 21:50:54,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:54,253 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1596 transitions. [2021-03-10 21:50:54,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:54,253 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:54,253 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:54,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-03-10 21:50:54,463 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:54,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:54,463 INFO L82 PathProgramCache]: Analyzing trace with hash -22923196, now seen corresponding path program 44 times [2021-03-10 21:50:54,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:54,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700728488] [2021-03-10 21:50:54,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:54,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700728488] [2021-03-10 21:50:54,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486544191] [2021-03-10 21:50:54,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:54,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:50:54,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:54,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:50:54,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:54,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:50:54,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:54,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:54,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:50:54,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:27 [2021-03-10 21:50:54,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:50:54,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:54,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:50:54,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:54,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:54,796 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:50:54,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:50:54,797 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:37 [2021-03-10 21:50:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:54,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:54,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:50:54,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022506393] [2021-03-10 21:50:54,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:50:54,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:54,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:50:54,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:50:54,928 INFO L87 Difference]: Start difference. First operand 517 states and 1596 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:55,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:55,201 INFO L93 Difference]: Finished difference Result 621 states and 1902 transitions. [2021-03-10 21:50:55,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:50:55,201 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:55,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:55,203 INFO L225 Difference]: With dead ends: 621 [2021-03-10 21:50:55,203 INFO L226 Difference]: Without dead ends: 590 [2021-03-10 21:50:55,203 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 365.0ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:55,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-03-10 21:50:55,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 510. [2021-03-10 21:50:55,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 3.094302554027505) internal successors, (1575), 509 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:55,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1575 transitions. [2021-03-10 21:50:55,209 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1575 transitions. Word has length 24 [2021-03-10 21:50:55,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:55,209 INFO L480 AbstractCegarLoop]: Abstraction has 510 states and 1575 transitions. [2021-03-10 21:50:55,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:55,209 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1575 transitions. [2021-03-10 21:50:55,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:55,210 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:55,210 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:55,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable381 [2021-03-10 21:50:55,415 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:55,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:55,422 INFO L82 PathProgramCache]: Analyzing trace with hash 2123247564, now seen corresponding path program 45 times [2021-03-10 21:50:55,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:55,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325539027] [2021-03-10 21:50:55,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:55,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325539027] [2021-03-10 21:50:55,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629360875] [2021-03-10 21:50:55,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:55,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:50:55,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:55,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:55,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:55,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:50:55,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:55,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:50:55,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:55,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:55,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:50:55,774 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-03-10 21:50:55,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:50:55,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:55,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:50:55,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:55,883 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-03-10 21:50:55,883 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:50:55,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:50:55,886 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:55,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:55,909 INFO L518 ElimStorePlain]: Eliminatee v_prenex_178 vanished before elimination [2021-03-10 21:50:55,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:50:55,910 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:40 [2021-03-10 21:50:55,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:55,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:55,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:50:55,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91485842] [2021-03-10 21:50:55,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:50:55,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:55,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:50:55,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:50:55,996 INFO L87 Difference]: Start difference. First operand 510 states and 1575 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:56,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:56,490 INFO L93 Difference]: Finished difference Result 788 states and 2366 transitions. [2021-03-10 21:50:56,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:50:56,491 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:56,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:56,492 INFO L225 Difference]: With dead ends: 788 [2021-03-10 21:50:56,492 INFO L226 Difference]: Without dead ends: 697 [2021-03-10 21:50:56,492 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 598.7ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:50:56,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-03-10 21:50:56,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 539. [2021-03-10 21:50:56,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 3.087360594795539) internal successors, (1661), 538 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:56,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1661 transitions. [2021-03-10 21:50:56,499 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1661 transitions. Word has length 24 [2021-03-10 21:50:56,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:56,499 INFO L480 AbstractCegarLoop]: Abstraction has 539 states and 1661 transitions. [2021-03-10 21:50:56,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:56,500 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1661 transitions. [2021-03-10 21:50:56,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:56,500 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:56,500 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:56,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-03-10 21:50:56,716 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:56,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:56,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1830085998, now seen corresponding path program 46 times [2021-03-10 21:50:56,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:56,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303692817] [2021-03-10 21:50:56,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:56,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303692817] [2021-03-10 21:50:56,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215005637] [2021-03-10 21:50:56,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:56,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:50:56,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:56,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:56,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:57,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:57,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:57,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:57,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:57,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:57,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:57,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:57,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:57,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:57,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:57,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:57,051 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:57,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:57,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:57,055 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:57,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:57,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:57,122 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-03-10 21:50:57,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:57,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:57,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:50:57,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:57,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:57,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:50:57,420 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:57,451 INFO L628 ElimStorePlain]: treesize reduction 44, result has 39.7 percent of original size [2021-03-10 21:50:57,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:57,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:57,454 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:57,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:57,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:50:57,464 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:89, output treesize:12 [2021-03-10 21:50:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:57,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:57,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:50:57,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41176122] [2021-03-10 21:50:57,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:50:57,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:57,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:50:57,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:57,507 INFO L87 Difference]: Start difference. First operand 539 states and 1661 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:58,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:58,094 INFO L93 Difference]: Finished difference Result 725 states and 2142 transitions. [2021-03-10 21:50:58,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:50:58,094 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:58,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:58,095 INFO L225 Difference]: With dead ends: 725 [2021-03-10 21:50:58,095 INFO L226 Difference]: Without dead ends: 639 [2021-03-10 21:50:58,095 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 666.3ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:50:58,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-03-10 21:50:58,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 557. [2021-03-10 21:50:58,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 3.093525179856115) internal successors, (1720), 556 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1720 transitions. [2021-03-10 21:50:58,102 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1720 transitions. Word has length 24 [2021-03-10 21:50:58,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:58,102 INFO L480 AbstractCegarLoop]: Abstraction has 557 states and 1720 transitions. [2021-03-10 21:50:58,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:58,102 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1720 transitions. [2021-03-10 21:50:58,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:58,103 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:58,103 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:58,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-03-10 21:50:58,303 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:58,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:58,304 INFO L82 PathProgramCache]: Analyzing trace with hash 92114182, now seen corresponding path program 47 times [2021-03-10 21:50:58,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:58,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621146269] [2021-03-10 21:50:58,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:58,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621146269] [2021-03-10 21:50:58,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778005791] [2021-03-10 21:50:58,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:58,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:50:58,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:58,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:58,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:58,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:58,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:58,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:58,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:58,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:58,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:58,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:58,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:58,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:58,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:58,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:58,660 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:58,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:58,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:58,664 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:58,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:58,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:58,740 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-03-10 21:50:58,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:58,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:58,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:58,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:58,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:58,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:58,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:59,116 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-10 21:50:59,117 INFO L628 ElimStorePlain]: treesize reduction 49, result has 68.4 percent of original size [2021-03-10 21:50:59,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:50:59,121 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:59,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:59,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:59,125 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:59,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:59,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:59,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:59,173 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:59,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:59,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:59,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:50:59,221 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:59,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:59,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:50:59,264 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:169, output treesize:47 [2021-03-10 21:50:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:50:59,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:59,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:50:59,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102046713] [2021-03-10 21:50:59,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:59,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:59,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:59,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:59,357 INFO L87 Difference]: Start difference. First operand 557 states and 1720 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:59,696 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-03-10 21:50:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:59,873 INFO L93 Difference]: Finished difference Result 786 states and 2286 transitions. [2021-03-10 21:50:59,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:50:59,874 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:50:59,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:59,874 INFO L225 Difference]: With dead ends: 786 [2021-03-10 21:50:59,874 INFO L226 Difference]: Without dead ends: 698 [2021-03-10 21:50:59,875 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 633.7ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:50:59,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-03-10 21:50:59,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 557. [2021-03-10 21:50:59,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 3.097122302158273) internal successors, (1722), 556 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:59,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1722 transitions. [2021-03-10 21:50:59,882 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1722 transitions. Word has length 24 [2021-03-10 21:50:59,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:59,882 INFO L480 AbstractCegarLoop]: Abstraction has 557 states and 1722 transitions. [2021-03-10 21:50:59,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:59,882 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1722 transitions. [2021-03-10 21:50:59,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:50:59,883 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:59,883 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:00,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable399,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:00,083 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:00,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:00,084 INFO L82 PathProgramCache]: Analyzing trace with hash 311410158, now seen corresponding path program 48 times [2021-03-10 21:51:00,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:00,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308898918] [2021-03-10 21:51:00,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:00,345 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:51:00,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308898918] [2021-03-10 21:51:00,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108870168] [2021-03-10 21:51:00,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:00,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:51:00,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:00,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:51:00,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:00,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:00,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:00,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:00,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:00,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:00,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:00,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:00,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:00,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:00,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:00,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:00,491 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:00,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:00,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:00,495 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:00,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:00,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:51:00,574 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-03-10 21:51:00,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:00,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:00,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:00,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:00,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:00,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:00,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:00,950 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-03-10 21:51:00,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:00,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:00,954 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:00,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:00,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:51:00,968 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:91, output treesize:12 [2021-03-10 21:51:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:51:01,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:01,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:01,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126854108] [2021-03-10 21:51:01,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:01,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:01,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:01,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:01,010 INFO L87 Difference]: Start difference. First operand 557 states and 1722 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:01,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:01,469 INFO L93 Difference]: Finished difference Result 774 states and 2271 transitions. [2021-03-10 21:51:01,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:51:01,469 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:01,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:01,470 INFO L225 Difference]: With dead ends: 774 [2021-03-10 21:51:01,471 INFO L226 Difference]: Without dead ends: 692 [2021-03-10 21:51:01,471 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 592.0ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:51:01,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-03-10 21:51:01,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 568. [2021-03-10 21:51:01,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 3.1022927689594355) internal successors, (1759), 567 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:01,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 1759 transitions. [2021-03-10 21:51:01,478 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 1759 transitions. Word has length 24 [2021-03-10 21:51:01,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:01,478 INFO L480 AbstractCegarLoop]: Abstraction has 568 states and 1759 transitions. [2021-03-10 21:51:01,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:01,478 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 1759 transitions. [2021-03-10 21:51:01,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:01,479 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:01,479 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:01,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:01,679 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:01,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:01,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1722226322, now seen corresponding path program 49 times [2021-03-10 21:51:01,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:01,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504290253] [2021-03-10 21:51:01,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:01,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:01,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504290253] [2021-03-10 21:51:01,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126855130] [2021-03-10 21:51:01,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:01,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:51:01,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:02,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:02,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:02,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:02,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:02,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:02,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:02,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:02,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:02,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:02,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:02,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:02,049 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:02,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:02,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:02,053 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:02,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:02,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:51:02,122 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-03-10 21:51:02,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:02,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:02,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:02,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:02,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:02,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:02,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:02,510 INFO L628 ElimStorePlain]: treesize reduction 92, result has 46.2 percent of original size [2021-03-10 21:51:02,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:02,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:02,514 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:02,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:02,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:02,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:02,549 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:02,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:02,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:02,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:02,584 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:02,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:02,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:51:02,616 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:185, output treesize:34 [2021-03-10 21:51:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:02,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:02,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:02,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615624901] [2021-03-10 21:51:02,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:02,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:02,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:02,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:02,707 INFO L87 Difference]: Start difference. First operand 568 states and 1759 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:03,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:03,168 INFO L93 Difference]: Finished difference Result 881 states and 2618 transitions. [2021-03-10 21:51:03,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:51:03,170 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:03,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:03,171 INFO L225 Difference]: With dead ends: 881 [2021-03-10 21:51:03,171 INFO L226 Difference]: Without dead ends: 790 [2021-03-10 21:51:03,172 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 584.4ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:03,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-03-10 21:51:03,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 570. [2021-03-10 21:51:03,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 3.1054481546572936) internal successors, (1767), 569 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:03,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1767 transitions. [2021-03-10 21:51:03,179 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1767 transitions. Word has length 24 [2021-03-10 21:51:03,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:03,179 INFO L480 AbstractCegarLoop]: Abstraction has 570 states and 1767 transitions. [2021-03-10 21:51:03,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:03,179 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1767 transitions. [2021-03-10 21:51:03,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:03,180 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:03,180 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:03,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:03,381 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:03,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:03,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1896118492, now seen corresponding path program 50 times [2021-03-10 21:51:03,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:03,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49818962] [2021-03-10 21:51:03,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:03,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49818962] [2021-03-10 21:51:03,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850988429] [2021-03-10 21:51:03,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:03,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:51:03,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:03,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:51:03,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:03,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:03,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:03,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:03,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:03,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:03,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:03,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:03,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:03,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:03,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:03,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:03,774 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:03,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:03,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:03,778 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:03,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:03,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:51:03,846 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-03-10 21:51:03,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:03,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:03,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:04,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:04,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:04,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:04,062 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:04,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:04,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:04,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:04,139 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:04,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:04,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:04,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:04,212 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:04,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:04,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:04,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:04,283 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:04,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:04,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:04,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:04,359 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:04,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:04,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:04,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:04,426 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:04,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:04,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:04,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:04,489 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:04,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:04,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:51:04,545 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:173, output treesize:69 [2021-03-10 21:51:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:04,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:04,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:04,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482695367] [2021-03-10 21:51:04,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:04,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:04,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:04,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:04,677 INFO L87 Difference]: Start difference. First operand 570 states and 1767 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:05,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:05,411 INFO L93 Difference]: Finished difference Result 1020 states and 3034 transitions. [2021-03-10 21:51:05,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:51:05,412 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:05,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:05,413 INFO L225 Difference]: With dead ends: 1020 [2021-03-10 21:51:05,413 INFO L226 Difference]: Without dead ends: 954 [2021-03-10 21:51:05,413 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 848.7ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:51:05,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-03-10 21:51:05,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 573. [2021-03-10 21:51:05,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 3.1066433566433567) internal successors, (1777), 572 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:05,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1777 transitions. [2021-03-10 21:51:05,420 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1777 transitions. Word has length 24 [2021-03-10 21:51:05,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:05,420 INFO L480 AbstractCegarLoop]: Abstraction has 573 states and 1777 transitions. [2021-03-10 21:51:05,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:05,420 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1777 transitions. [2021-03-10 21:51:05,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:05,421 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:05,421 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:05,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:05,627 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:05,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:05,627 INFO L82 PathProgramCache]: Analyzing trace with hash -296528028, now seen corresponding path program 51 times [2021-03-10 21:51:05,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:05,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018029186] [2021-03-10 21:51:05,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:05,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018029186] [2021-03-10 21:51:05,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420052271] [2021-03-10 21:51:05,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:05,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:51:05,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:05,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:51:05,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:05,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:05,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:05,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:05,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:05,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:05,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:05,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:05,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:05,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:05,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:05,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:05,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:05,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:05,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:05,966 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:06,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:06,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:51:06,047 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-03-10 21:51:06,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:06,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:06,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:06,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:06,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:06,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:06,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:06,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:06,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:06,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:06,354 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:06,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:06,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:06,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:06,429 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:06,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:06,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:06,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:06,505 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:06,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:06,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:06,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:06,579 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:06,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:06,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:06,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:06,650 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:06,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:06,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:06,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:06,718 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:06,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:06,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:51:06,780 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:193, output treesize:69 [2021-03-10 21:51:06,931 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:06,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:06,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:06,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757563949] [2021-03-10 21:51:06,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:06,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:06,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:06,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:06,932 INFO L87 Difference]: Start difference. First operand 573 states and 1777 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:07,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:07,527 INFO L93 Difference]: Finished difference Result 989 states and 2947 transitions. [2021-03-10 21:51:07,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:51:07,528 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:07,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:07,529 INFO L225 Difference]: With dead ends: 989 [2021-03-10 21:51:07,529 INFO L226 Difference]: Without dead ends: 931 [2021-03-10 21:51:07,529 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 618.4ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:51:07,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-03-10 21:51:07,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 591. [2021-03-10 21:51:07,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.159322033898305) internal successors, (1864), 590 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:07,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1864 transitions. [2021-03-10 21:51:07,536 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1864 transitions. Word has length 24 [2021-03-10 21:51:07,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:07,536 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 1864 transitions. [2021-03-10 21:51:07,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:07,537 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1864 transitions. [2021-03-10 21:51:07,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:07,537 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:07,537 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:07,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-03-10 21:51:07,739 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:07,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:07,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1421227196, now seen corresponding path program 52 times [2021-03-10 21:51:07,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:07,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626981286] [2021-03-10 21:51:07,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:07,977 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:07,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626981286] [2021-03-10 21:51:07,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722185659] [2021-03-10 21:51:07,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:08,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:51:08,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:08,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:51:08,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:08,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:08,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:08,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:08,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:08,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:08,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:08,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:08,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:08,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-03-10 21:51:08,163 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:75 [2021-03-10 21:51:08,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:08,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:08,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:08,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:08,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:08,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:08,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:08,451 INFO L628 ElimStorePlain]: treesize reduction 102, result has 46.6 percent of original size [2021-03-10 21:51:08,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:08,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:08,457 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:08,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:08,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:08,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:08,498 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:08,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:08,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:08,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:08,536 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:08,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:08,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:51:08,569 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:205, output treesize:34 [2021-03-10 21:51:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:08,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:08,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:08,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611686815] [2021-03-10 21:51:08,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:08,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:08,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:08,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:08,653 INFO L87 Difference]: Start difference. First operand 591 states and 1864 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:09,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:09,200 INFO L93 Difference]: Finished difference Result 910 states and 2719 transitions. [2021-03-10 21:51:09,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:51:09,200 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:09,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:09,202 INFO L225 Difference]: With dead ends: 910 [2021-03-10 21:51:09,202 INFO L226 Difference]: Without dead ends: 790 [2021-03-10 21:51:09,202 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 606.4ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:51:09,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-03-10 21:51:09,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 588. [2021-03-10 21:51:09,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 3.1175468483816013) internal successors, (1830), 587 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:09,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1830 transitions. [2021-03-10 21:51:09,209 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1830 transitions. Word has length 24 [2021-03-10 21:51:09,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:09,209 INFO L480 AbstractCegarLoop]: Abstraction has 588 states and 1830 transitions. [2021-03-10 21:51:09,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1830 transitions. [2021-03-10 21:51:09,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:09,210 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:09,210 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:09,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-03-10 21:51:09,411 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:09,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:09,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1392763898, now seen corresponding path program 53 times [2021-03-10 21:51:09,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:09,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425551281] [2021-03-10 21:51:09,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:09,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425551281] [2021-03-10 21:51:09,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280615371] [2021-03-10 21:51:09,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:09,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:51:09,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:09,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:51:09,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:09,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:09,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:09,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:09,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:09,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:09,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:09,802 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:09,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:09,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:51:09,831 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-03-10 21:51:09,898 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-03-10 21:51:09,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:09,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:09,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:09,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:09,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:09,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:09,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:09,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:09,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:09,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:09,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:09,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:09,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:09,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:09,917 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:09,999 INFO L628 ElimStorePlain]: treesize reduction 87, result has 46.0 percent of original size [2021-03-10 21:51:10,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:10,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:10,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:10,004 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:10,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:10,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:10,012 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:10,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:10,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:51:10,047 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:185, output treesize:34 [2021-03-10 21:51:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:10,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:10,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:10,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369943627] [2021-03-10 21:51:10,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:10,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:10,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:10,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:10,133 INFO L87 Difference]: Start difference. First operand 588 states and 1830 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:10,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:10,747 INFO L93 Difference]: Finished difference Result 995 states and 2949 transitions. [2021-03-10 21:51:10,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:51:10,748 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:10,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:10,749 INFO L225 Difference]: With dead ends: 995 [2021-03-10 21:51:10,749 INFO L226 Difference]: Without dead ends: 873 [2021-03-10 21:51:10,749 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 695.2ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:51:10,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-03-10 21:51:10,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 621. [2021-03-10 21:51:10,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 3.1548387096774193) internal successors, (1956), 620 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:10,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1956 transitions. [2021-03-10 21:51:10,757 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1956 transitions. Word has length 24 [2021-03-10 21:51:10,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:10,757 INFO L480 AbstractCegarLoop]: Abstraction has 621 states and 1956 transitions. [2021-03-10 21:51:10,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:10,757 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1956 transitions. [2021-03-10 21:51:10,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:10,758 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:10,758 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:10,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-03-10 21:51:10,959 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:10,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:10,959 INFO L82 PathProgramCache]: Analyzing trace with hash -761559396, now seen corresponding path program 54 times [2021-03-10 21:51:10,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:10,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216352001] [2021-03-10 21:51:10,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:10,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:11,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216352001] [2021-03-10 21:51:11,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849249107] [2021-03-10 21:51:11,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:11,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:51:11,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:11,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:51:11,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:11,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:11,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:11,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:11,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:11,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:11,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:11,501 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:11,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:11,504 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:11,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:11,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:51:11,563 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:51:11,678 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-03-10 21:51:11,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:11,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:11,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:11,690 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:11,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:11,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:11,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:11,700 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:11,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:11,705 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:11,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:11,711 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:11,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:11,716 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:11,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:11,721 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:11,932 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-03-10 21:51:11,933 INFO L628 ElimStorePlain]: treesize reduction 159, result has 52.8 percent of original size [2021-03-10 21:51:11,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:51:11,939 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:11,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:11,944 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:11,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:11,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:11,949 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:12,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:12,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:51:12,030 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:385, output treesize:96 [2021-03-10 21:51:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:12,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:12,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:12,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679607135] [2021-03-10 21:51:12,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:12,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:12,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:12,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:12,197 INFO L87 Difference]: Start difference. First operand 621 states and 1956 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:12,442 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-03-10 21:51:12,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:12,935 INFO L93 Difference]: Finished difference Result 1006 states and 3041 transitions. [2021-03-10 21:51:12,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:51:12,935 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:12,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:12,937 INFO L225 Difference]: With dead ends: 1006 [2021-03-10 21:51:12,937 INFO L226 Difference]: Without dead ends: 926 [2021-03-10 21:51:12,937 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1029.2ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:51:12,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-03-10 21:51:12,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 635. [2021-03-10 21:51:12,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 3.175078864353312) internal successors, (2013), 634 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:12,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 2013 transitions. [2021-03-10 21:51:12,945 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 2013 transitions. Word has length 24 [2021-03-10 21:51:12,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:12,945 INFO L480 AbstractCegarLoop]: Abstraction has 635 states and 2013 transitions. [2021-03-10 21:51:12,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:12,945 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 2013 transitions. [2021-03-10 21:51:12,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:12,946 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:12,946 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:13,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-03-10 21:51:13,147 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:13,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:13,147 INFO L82 PathProgramCache]: Analyzing trace with hash 838031068, now seen corresponding path program 55 times [2021-03-10 21:51:13,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:13,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131731986] [2021-03-10 21:51:13,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:13,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131731986] [2021-03-10 21:51:13,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5150947] [2021-03-10 21:51:13,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:13,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:51:13,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:13,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:13,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:13,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:13,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:13,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:13,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:13,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:13,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:13,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:13,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:13,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:13,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:13,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:13,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:13,589 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:13,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:13,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:51:13,648 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:51:13,766 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-03-10 21:51:13,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:13,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:13,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:13,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:13,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:13,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:13,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:13,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:13,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:13,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:13,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:13,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:13,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:13,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:13,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:13,788 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:13,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:13,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:13,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:13,793 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:13,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:13,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:13,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:13,798 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:13,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:13,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:13,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:13,804 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:13,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:13,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:13,808 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:14,014 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-03-10 21:51:14,015 INFO L628 ElimStorePlain]: treesize reduction 150, result has 55.5 percent of original size [2021-03-10 21:51:14,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:14,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:14,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:51:14,021 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:14,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:14,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:14,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:14,027 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:14,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:14,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:14,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:51:14,033 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:14,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:14,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:14,040 INFO L550 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:14,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:14,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:51:14,123 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:385, output treesize:96 [2021-03-10 21:51:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:14,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:14,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:14,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031565859] [2021-03-10 21:51:14,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:14,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:14,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:14,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:14,287 INFO L87 Difference]: Start difference. First operand 635 states and 2013 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:14,594 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-03-10 21:51:15,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:15,486 INFO L93 Difference]: Finished difference Result 1212 states and 3565 transitions. [2021-03-10 21:51:15,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:51:15,487 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:15,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:15,488 INFO L225 Difference]: With dead ends: 1212 [2021-03-10 21:51:15,488 INFO L226 Difference]: Without dead ends: 1094 [2021-03-10 21:51:15,488 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1182.1ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:51:15,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-03-10 21:51:15,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 645. [2021-03-10 21:51:15,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 3.203416149068323) internal successors, (2063), 644 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:15,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2063 transitions. [2021-03-10 21:51:15,497 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2063 transitions. Word has length 24 [2021-03-10 21:51:15,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:15,497 INFO L480 AbstractCegarLoop]: Abstraction has 645 states and 2063 transitions. [2021-03-10 21:51:15,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:15,497 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2063 transitions. [2021-03-10 21:51:15,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:15,498 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:15,498 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:15,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:15,699 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:15,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:15,699 INFO L82 PathProgramCache]: Analyzing trace with hash 12644974, now seen corresponding path program 56 times [2021-03-10 21:51:15,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:15,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326898336] [2021-03-10 21:51:15,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:15,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326898336] [2021-03-10 21:51:15,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945103526] [2021-03-10 21:51:15,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:15,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:51:15,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:15,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:51:15,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:16,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:16,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:16,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:16,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:16,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:16,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:16,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:16,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:16,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:16,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:16,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:16,124 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:16,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:16,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:16,128 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:16,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:16,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:51:16,187 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:51:16,340 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-03-10 21:51:16,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:16,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:16,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:16,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:16,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:16,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:16,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:16,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:16,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:16,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:16,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:16,382 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:16,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:16,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:16,386 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:16,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:16,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:51:16,414 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:83, output treesize:31 [2021-03-10 21:51:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:16,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:16,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:16,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328954337] [2021-03-10 21:51:16,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:16,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:16,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:16,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:16,517 INFO L87 Difference]: Start difference. First operand 645 states and 2063 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:16,783 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-03-10 21:51:17,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:17,171 INFO L93 Difference]: Finished difference Result 900 states and 2783 transitions. [2021-03-10 21:51:17,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:51:17,172 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:17,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:17,173 INFO L225 Difference]: With dead ends: 900 [2021-03-10 21:51:17,173 INFO L226 Difference]: Without dead ends: 838 [2021-03-10 21:51:17,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 815.2ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:51:17,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-03-10 21:51:17,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 644. [2021-03-10 21:51:17,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 3.192846034214619) internal successors, (2053), 643 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:17,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 2053 transitions. [2021-03-10 21:51:17,181 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 2053 transitions. Word has length 24 [2021-03-10 21:51:17,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:17,181 INFO L480 AbstractCegarLoop]: Abstraction has 644 states and 2053 transitions. [2021-03-10 21:51:17,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:17,181 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 2053 transitions. [2021-03-10 21:51:17,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:17,183 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:17,183 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:17,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:17,383 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:17,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:17,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1553402530, now seen corresponding path program 57 times [2021-03-10 21:51:17,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:17,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022396048] [2021-03-10 21:51:17,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:17,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022396048] [2021-03-10 21:51:17,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240395978] [2021-03-10 21:51:17,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:17,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:51:17,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:17,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:51:17,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:17,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:17,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:17,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:17,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:17,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:17,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:17,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:17,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:17,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-03-10 21:51:17,755 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-03-10 21:51:17,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:17,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:17,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:17,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:17,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:17,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:17,910 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:17,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:17,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:51:17,921 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:11 [2021-03-10 21:51:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:17,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:17,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:17,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618590387] [2021-03-10 21:51:17,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:17,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:17,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:17,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:17,963 INFO L87 Difference]: Start difference. First operand 644 states and 2053 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:18,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:18,225 INFO L93 Difference]: Finished difference Result 713 states and 2226 transitions. [2021-03-10 21:51:18,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:51:18,225 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:18,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:18,226 INFO L225 Difference]: With dead ends: 713 [2021-03-10 21:51:18,226 INFO L226 Difference]: Without dead ends: 682 [2021-03-10 21:51:18,226 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 353.4ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:51:18,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-03-10 21:51:18,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 650. [2021-03-10 21:51:18,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 3.189522342064715) internal successors, (2070), 649 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:18,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 2070 transitions. [2021-03-10 21:51:18,233 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 2070 transitions. Word has length 24 [2021-03-10 21:51:18,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:18,234 INFO L480 AbstractCegarLoop]: Abstraction has 650 states and 2070 transitions. [2021-03-10 21:51:18,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:18,234 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 2070 transitions. [2021-03-10 21:51:18,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:18,235 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:18,235 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:18,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:18,435 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:18,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:18,435 INFO L82 PathProgramCache]: Analyzing trace with hash -184569286, now seen corresponding path program 58 times [2021-03-10 21:51:18,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:18,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334192686] [2021-03-10 21:51:18,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:18,621 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:18,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334192686] [2021-03-10 21:51:18,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940442225] [2021-03-10 21:51:18,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:18,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:51:18,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:18,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:51:18,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:18,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:18,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:18,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-03-10 21:51:18,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:18,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:18,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:51:18,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:18,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:18,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-03-10 21:51:18,825 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:71 [2021-03-10 21:51:18,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:18,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:18,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:18,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:18,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:18,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:18,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:19,048 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-03-10 21:51:19,048 INFO L628 ElimStorePlain]: treesize reduction 71, result has 61.2 percent of original size [2021-03-10 21:51:19,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:19,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:19,054 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:19,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:19,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:19,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:19,118 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:19,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:19,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:19,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:19,186 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:19,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:19,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:51:19,240 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:197, output treesize:47 [2021-03-10 21:51:19,332 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:19,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:19,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:19,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855457061] [2021-03-10 21:51:19,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:19,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:19,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:19,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:19,333 INFO L87 Difference]: Start difference. First operand 650 states and 2070 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:19,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:19,614 INFO L93 Difference]: Finished difference Result 745 states and 2292 transitions. [2021-03-10 21:51:19,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:51:19,614 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:19,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:19,616 INFO L225 Difference]: With dead ends: 745 [2021-03-10 21:51:19,616 INFO L226 Difference]: Without dead ends: 696 [2021-03-10 21:51:19,616 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 384.1ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:51:19,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-03-10 21:51:19,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 650. [2021-03-10 21:51:19,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 3.189522342064715) internal successors, (2070), 649 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:19,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 2070 transitions. [2021-03-10 21:51:19,624 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 2070 transitions. Word has length 24 [2021-03-10 21:51:19,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:19,624 INFO L480 AbstractCegarLoop]: Abstraction has 650 states and 2070 transitions. [2021-03-10 21:51:19,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:19,624 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 2070 transitions. [2021-03-10 21:51:19,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:19,625 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:19,625 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:19,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-03-10 21:51:19,825 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:19,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:19,825 INFO L82 PathProgramCache]: Analyzing trace with hash -722062142, now seen corresponding path program 59 times [2021-03-10 21:51:19,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:19,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074475648] [2021-03-10 21:51:19,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:20,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074475648] [2021-03-10 21:51:20,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265278114] [2021-03-10 21:51:20,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:20,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:51:20,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:20,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:51:20,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:20,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:51:20,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:20,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:51:20,140 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:20,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:20,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:51:20,164 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:77, output treesize:55 [2021-03-10 21:51:20,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:20,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2021-03-10 21:51:20,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 21:51:20,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:20,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2021-03-10 21:51:20,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:51:20,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:20,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-03-10 21:51:20,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:51:20,278 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 21:51:20,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-03-10 21:51:20,280 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:20,391 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-03-10 21:51:20,392 INFO L628 ElimStorePlain]: treesize reduction 19, result has 86.9 percent of original size [2021-03-10 21:51:20,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:20,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:20,396 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:20,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:20,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:20,405 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:20,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:20,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:20,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:51:20,465 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:97 [2021-03-10 21:51:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:20,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:20,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-03-10 21:51:20,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318620317] [2021-03-10 21:51:20,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:51:20,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:20,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:51:20,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:51:20,743 INFO L87 Difference]: Start difference. First operand 650 states and 2070 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 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) [2021-03-10 21:51:21,375 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-03-10 21:51:21,525 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-03-10 21:51:21,688 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 21:51:21,819 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-03-10 21:51:22,114 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-03-10 21:51:22,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:22,626 INFO L93 Difference]: Finished difference Result 1086 states and 3139 transitions. [2021-03-10 21:51:22,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:51:22,627 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 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 24 [2021-03-10 21:51:22,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:22,628 INFO L225 Difference]: With dead ends: 1086 [2021-03-10 21:51:22,628 INFO L226 Difference]: Without dead ends: 1019 [2021-03-10 21:51:22,628 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1927.4ms TimeCoverageRelationStatistics Valid=269, Invalid=1291, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:51:22,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2021-03-10 21:51:22,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 805. [2021-03-10 21:51:22,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.1181592039800994) internal successors, (2507), 804 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:22,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2507 transitions. [2021-03-10 21:51:22,639 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2507 transitions. Word has length 24 [2021-03-10 21:51:22,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:22,639 INFO L480 AbstractCegarLoop]: Abstraction has 805 states and 2507 transitions. [2021-03-10 21:51:22,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 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) [2021-03-10 21:51:22,639 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2507 transitions. [2021-03-10 21:51:22,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:22,640 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:22,640 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:22,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:22,842 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:22,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:22,843 INFO L82 PathProgramCache]: Analyzing trace with hash 664700228, now seen corresponding path program 60 times [2021-03-10 21:51:22,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:22,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882495093] [2021-03-10 21:51:22,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:22,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882495093] [2021-03-10 21:51:22,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666182971] [2021-03-10 21:51:22,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:23,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:51:23,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:23,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:51:23,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:23,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:23,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:23,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:23,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:23,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:23,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:23,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:23,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:23,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:23,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:23,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:23,131 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:23,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:23,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:23,135 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:23,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:23,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:51:23,218 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-03-10 21:51:23,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:23,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:51:23,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:23,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:23,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:23,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:51:23,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:23,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:23,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:51:23,537 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:11 [2021-03-10 21:51:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:23,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:23,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:51:23,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908314013] [2021-03-10 21:51:23,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:51:23,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:23,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:51:23,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:51:23,559 INFO L87 Difference]: Start difference. First operand 805 states and 2507 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:23,832 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 57 [2021-03-10 21:51:24,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:24,057 INFO L93 Difference]: Finished difference Result 960 states and 2923 transitions. [2021-03-10 21:51:24,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:51:24,057 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:24,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:24,058 INFO L225 Difference]: With dead ends: 960 [2021-03-10 21:51:24,058 INFO L226 Difference]: Without dead ends: 901 [2021-03-10 21:51:24,059 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 571.1ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:51:24,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-03-10 21:51:24,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 820. [2021-03-10 21:51:24,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.1196581196581197) internal successors, (2555), 819 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:24,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2555 transitions. [2021-03-10 21:51:24,067 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2555 transitions. Word has length 24 [2021-03-10 21:51:24,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:24,067 INFO L480 AbstractCegarLoop]: Abstraction has 820 states and 2555 transitions. [2021-03-10 21:51:24,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:24,067 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2555 transitions. [2021-03-10 21:51:24,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:24,068 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:24,068 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:24,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable516 [2021-03-10 21:51:24,275 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:24,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:24,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1073271588, now seen corresponding path program 61 times [2021-03-10 21:51:24,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:24,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229209857] [2021-03-10 21:51:24,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:24,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:24,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229209857] [2021-03-10 21:51:24,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793662659] [2021-03-10 21:51:24,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:51:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:24,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:51:24,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:24,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:24,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:24,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:24,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:24,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:24,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:24,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:24,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:24,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:24,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:24,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:24,599 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:24,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:24,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:24,603 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:24,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:24,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:51:24,687 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-03-10 21:51:24,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:24,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:24,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:24,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:24,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:24,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:24,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,079 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-03-10 21:51:25,079 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.1 percent of original size [2021-03-10 21:51:25,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:51:25,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:25,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:25,089 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:25,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:25,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:25,153 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:25,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:25,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:25,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:25,211 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:25,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:25,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:51:25,262 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:189, output treesize:47 [2021-03-10 21:51:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:25,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:25,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:25,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328584658] [2021-03-10 21:51:25,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:25,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:25,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:25,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:25,358 INFO L87 Difference]: Start difference. First operand 820 states and 2555 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:25,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:25,815 INFO L93 Difference]: Finished difference Result 1143 states and 3379 transitions. [2021-03-10 21:51:25,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:51:25,815 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:25,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:25,817 INFO L225 Difference]: With dead ends: 1143 [2021-03-10 21:51:25,817 INFO L226 Difference]: Without dead ends: 1051 [2021-03-10 21:51:25,817 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 575.3ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:51:25,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-03-10 21:51:25,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 826. [2021-03-10 21:51:25,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 3.1272727272727274) internal successors, (2580), 825 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:25,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2580 transitions. [2021-03-10 21:51:25,828 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2580 transitions. Word has length 24 [2021-03-10 21:51:25,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:25,828 INFO L480 AbstractCegarLoop]: Abstraction has 826 states and 2580 transitions. [2021-03-10 21:51:25,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:25,828 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2580 transitions. [2021-03-10 21:51:25,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:25,830 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:25,830 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:26,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:26,030 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:26,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:26,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1567025374, now seen corresponding path program 62 times [2021-03-10 21:51:26,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:26,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033001748] [2021-03-10 21:51:26,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:26,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033001748] [2021-03-10 21:51:26,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696148154] [2021-03-10 21:51:26,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:51:26,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:51:26,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:26,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:51:26,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:26,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:26,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:26,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:26,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:26,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:26,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:26,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:26,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:26,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-03-10 21:51:26,437 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-03-10 21:51:26,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:26,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:26,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:26,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:26,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:26,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:26,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:26,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:26,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:26,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:26,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:26,616 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:26,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:26,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:26,620 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:26,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:26,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:51:26,650 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-03-10 21:51:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:26,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:26,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:26,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871858372] [2021-03-10 21:51:26,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:26,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:26,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:26,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:26,718 INFO L87 Difference]: Start difference. First operand 826 states and 2580 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:27,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:27,298 INFO L93 Difference]: Finished difference Result 1006 states and 3022 transitions. [2021-03-10 21:51:27,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:51:27,299 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:27,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:27,300 INFO L225 Difference]: With dead ends: 1006 [2021-03-10 21:51:27,300 INFO L226 Difference]: Without dead ends: 881 [2021-03-10 21:51:27,300 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 587.5ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:51:27,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2021-03-10 21:51:27,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 813. [2021-03-10 21:51:27,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 3.1182266009852215) internal successors, (2532), 812 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:27,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2532 transitions. [2021-03-10 21:51:27,310 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2532 transitions. Word has length 24 [2021-03-10 21:51:27,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:27,310 INFO L480 AbstractCegarLoop]: Abstraction has 813 states and 2532 transitions. [2021-03-10 21:51:27,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:27,310 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2532 transitions. [2021-03-10 21:51:27,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:27,311 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:27,311 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:27,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2021-03-10 21:51:27,512 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:27,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:27,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1407355204, now seen corresponding path program 63 times [2021-03-10 21:51:27,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:27,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259891203] [2021-03-10 21:51:27,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:27,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259891203] [2021-03-10 21:51:27,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694497852] [2021-03-10 21:51:27,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:27,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:51:27,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:27,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:51:27,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:27,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:27,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:27,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:27,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:27,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:27,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:27,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:27,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:27,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:27,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:27,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:27,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:27,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:27,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:27,845 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:27,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:27,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:51:27,929 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-03-10 21:51:28,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:28,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:28,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:28,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:28,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:28,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:28,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:28,313 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-03-10 21:51:28,314 INFO L628 ElimStorePlain]: treesize reduction 102, result has 46.6 percent of original size [2021-03-10 21:51:28,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:28,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:28,318 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:28,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:28,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:28,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:28,359 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:28,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:28,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:28,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:28,398 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:28,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:28,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:51:28,432 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:205, output treesize:40 [2021-03-10 21:51:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:28,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:28,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:51:28,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450584973] [2021-03-10 21:51:28,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:51:28,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:28,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:51:28,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:51:28,513 INFO L87 Difference]: Start difference. First operand 813 states and 2532 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:28,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:28,894 INFO L93 Difference]: Finished difference Result 926 states and 2822 transitions. [2021-03-10 21:51:28,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:51:28,895 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:28,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:28,896 INFO L225 Difference]: With dead ends: 926 [2021-03-10 21:51:28,896 INFO L226 Difference]: Without dead ends: 866 [2021-03-10 21:51:28,896 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 440.4ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:28,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2021-03-10 21:51:28,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 813. [2021-03-10 21:51:28,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 3.1182266009852215) internal successors, (2532), 812 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:28,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2532 transitions. [2021-03-10 21:51:28,905 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2532 transitions. Word has length 24 [2021-03-10 21:51:28,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:28,906 INFO L480 AbstractCegarLoop]: Abstraction has 813 states and 2532 transitions. [2021-03-10 21:51:28,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:28,906 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2532 transitions. [2021-03-10 21:51:28,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:28,907 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:28,907 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:29,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:29,107 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:29,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:29,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1233463034, now seen corresponding path program 64 times [2021-03-10 21:51:29,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:29,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842772548] [2021-03-10 21:51:29,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:29,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842772548] [2021-03-10 21:51:29,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857104046] [2021-03-10 21:51:29,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:29,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:51:29,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:29,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:51:29,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:29,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:29,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:29,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:29,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:29,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:29,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:29,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:29,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:29,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:29,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:29,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:29,465 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:29,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:29,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:29,469 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:29,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:29,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:51:29,552 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-03-10 21:51:29,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:29,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:29,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:29,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:29,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:29,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:29,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:30,010 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 92 [2021-03-10 21:51:30,011 INFO L628 ElimStorePlain]: treesize reduction 173, result has 57.9 percent of original size [2021-03-10 21:51:30,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:30,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:30,017 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:30,130 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-10 21:51:30,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:30,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:30,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:30,137 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:30,250 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-03-10 21:51:30,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:30,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:51:30,260 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:30,377 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-10 21:51:30,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:30,378 INFO L518 ElimStorePlain]: Eliminatee v_prenex_293 vanished before elimination [2021-03-10 21:51:30,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:30,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:30,384 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:30,492 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-10 21:51:30,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:30,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:30,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:30,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:30,499 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:30,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:30,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:30,504 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:30,612 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-10 21:51:30,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:30,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:30,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:30,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:30,619 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:30,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:30,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:30,624 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:30,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:30,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:51:30,721 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:425, output treesize:111 [2021-03-10 21:51:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:30,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:30,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:51:30,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446499063] [2021-03-10 21:51:30,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:51:30,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:30,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:51:30,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:51:30,891 INFO L87 Difference]: Start difference. First operand 813 states and 2532 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:31,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:31,565 INFO L93 Difference]: Finished difference Result 1070 states and 3220 transitions. [2021-03-10 21:51:31,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:51:31,566 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:31,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:31,567 INFO L225 Difference]: With dead ends: 1070 [2021-03-10 21:51:31,567 INFO L226 Difference]: Without dead ends: 974 [2021-03-10 21:51:31,567 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 739.7ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:31,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-03-10 21:51:31,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 832. [2021-03-10 21:51:31,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 3.1299638989169676) internal successors, (2601), 831 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:31,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2601 transitions. [2021-03-10 21:51:31,578 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2601 transitions. Word has length 24 [2021-03-10 21:51:31,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:31,578 INFO L480 AbstractCegarLoop]: Abstraction has 832 states and 2601 transitions. [2021-03-10 21:51:31,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:31,579 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2601 transitions. [2021-03-10 21:51:31,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:31,580 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:31,580 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:31,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-03-10 21:51:31,780 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:31,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:31,781 INFO L82 PathProgramCache]: Analyzing trace with hash 353189498, now seen corresponding path program 65 times [2021-03-10 21:51:31,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:31,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511217138] [2021-03-10 21:51:31,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:31,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:32,037 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:51:32,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511217138] [2021-03-10 21:51:32,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834998943] [2021-03-10 21:51:32,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:32,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:51:32,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:32,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:51:32,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:32,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:32,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:32,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:32,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:32,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:32,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:32,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:32,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:32,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:32,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:32,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:32,291 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:32,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:32,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:32,295 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:32,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:32,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:51:32,380 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-03-10 21:51:32,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:32,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:32,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:32,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:32,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:32,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:32,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:32,820 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 93 [2021-03-10 21:51:32,821 INFO L628 ElimStorePlain]: treesize reduction 174, result has 57.9 percent of original size [2021-03-10 21:51:32,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:51:32,826 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:32,940 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-10 21:51:32,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:32,940 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:51:32,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:32,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:32,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:32,949 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:32,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:32,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:32,954 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:33,062 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-10 21:51:33,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:33,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:33,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:33,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:33,069 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:33,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:33,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:33,075 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:33,178 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-03-10 21:51:33,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:33,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:33,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:33,184 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:33,285 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-10 21:51:33,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:33,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:33,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:33,292 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:33,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:33,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:33,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:33,396 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:33,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:33,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:51:33,500 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:425, output treesize:102 [2021-03-10 21:51:33,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:51:33,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:33,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:51:33,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169500272] [2021-03-10 21:51:33,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:51:33,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:33,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:51:33,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:51:33,664 INFO L87 Difference]: Start difference. First operand 832 states and 2601 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:34,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:34,206 INFO L93 Difference]: Finished difference Result 1168 states and 3477 transitions. [2021-03-10 21:51:34,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:51:34,206 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:34,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:34,207 INFO L225 Difference]: With dead ends: 1168 [2021-03-10 21:51:34,208 INFO L226 Difference]: Without dead ends: 1081 [2021-03-10 21:51:34,208 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 607.7ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:51:34,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-03-10 21:51:34,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 827. [2021-03-10 21:51:34,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 3.1186440677966103) internal successors, (2576), 826 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:34,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2576 transitions. [2021-03-10 21:51:34,217 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2576 transitions. Word has length 24 [2021-03-10 21:51:34,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:34,217 INFO L480 AbstractCegarLoop]: Abstraction has 827 states and 2576 transitions. [2021-03-10 21:51:34,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:34,217 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2576 transitions. [2021-03-10 21:51:34,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:34,218 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:34,218 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:34,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-03-10 21:51:34,419 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:34,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:34,419 INFO L82 PathProgramCache]: Analyzing trace with hash 2067234404, now seen corresponding path program 66 times [2021-03-10 21:51:34,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:34,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159351661] [2021-03-10 21:51:34,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:34,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159351661] [2021-03-10 21:51:34,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721913845] [2021-03-10 21:51:34,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:51:34,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:51:34,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:34,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:51:34,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:34,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:34,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:34,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:34,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:34,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:34,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:34,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:34,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:34,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:34,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:34,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:34,857 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:34,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:34,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:34,861 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:34,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:34,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:51:34,958 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-03-10 21:51:35,158 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-03-10 21:51:35,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:35,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:35,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:35,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:35,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:35,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:35,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:35,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:35,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:35,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:35,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:35,172 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:35,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:35,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:35,176 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:35,295 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-10 21:51:35,295 INFO L628 ElimStorePlain]: treesize reduction 58, result has 64.8 percent of original size [2021-03-10 21:51:35,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:35,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:35,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:51:35,300 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:35,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:35,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:35,307 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:35,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:35,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:51:35,358 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:189, output treesize:47 [2021-03-10 21:51:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:35,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:35,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:35,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827288336] [2021-03-10 21:51:35,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:35,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:35,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:35,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:35,459 INFO L87 Difference]: Start difference. First operand 827 states and 2576 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:35,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:35,958 INFO L93 Difference]: Finished difference Result 931 states and 2876 transitions. [2021-03-10 21:51:35,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:51:35,958 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:35,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:35,960 INFO L225 Difference]: With dead ends: 931 [2021-03-10 21:51:35,960 INFO L226 Difference]: Without dead ends: 878 [2021-03-10 21:51:35,960 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 555.9ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:51:35,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-03-10 21:51:35,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 830. [2021-03-10 21:51:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.1194209891435465) internal successors, (2586), 829 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) [2021-03-10 21:51:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2586 transitions. [2021-03-10 21:51:35,969 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2586 transitions. Word has length 24 [2021-03-10 21:51:35,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:35,969 INFO L480 AbstractCegarLoop]: Abstraction has 830 states and 2586 transitions. [2021-03-10 21:51:35,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:35,969 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2586 transitions. [2021-03-10 21:51:35,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:35,970 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:35,971 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:36,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:36,184 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:36,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:36,184 INFO L82 PathProgramCache]: Analyzing trace with hash 98903938, now seen corresponding path program 67 times [2021-03-10 21:51:36,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:36,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580898081] [2021-03-10 21:51:36,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:36,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580898081] [2021-03-10 21:51:36,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698413743] [2021-03-10 21:51:36,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:36,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:51:36,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:36,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:36,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:36,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:36,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:36,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:36,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:36,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:36,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:36,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:36,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:36,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:36,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:36,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:36,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:36,623 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:36,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:36,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:51:36,712 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-03-10 21:51:36,880 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-03-10 21:51:36,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:36,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:36,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:36,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:36,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:36,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:36,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:36,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:36,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:36,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:36,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:36,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:36,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:36,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:36,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:36,906 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:36,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:36,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:36,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:36,911 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:36,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:36,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:36,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:36,918 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:36,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:36,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:36,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:36,924 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:36,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:36,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:36,929 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:37,185 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-03-10 21:51:37,185 INFO L628 ElimStorePlain]: treesize reduction 173, result has 54.0 percent of original size [2021-03-10 21:51:37,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:37,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:37,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:37,192 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:37,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:37,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:37,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:51:37,198 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:37,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:37,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:37,204 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:37,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:37,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:51:37,301 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:425, output treesize:105 [2021-03-10 21:51:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:37,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:37,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:51:37,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561367119] [2021-03-10 21:51:37,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:51:37,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:37,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:51:37,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:51:37,469 INFO L87 Difference]: Start difference. First operand 830 states and 2586 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:38,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:38,146 INFO L93 Difference]: Finished difference Result 1042 states and 3154 transitions. [2021-03-10 21:51:38,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:51:38,147 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:38,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:38,148 INFO L225 Difference]: With dead ends: 1042 [2021-03-10 21:51:38,148 INFO L226 Difference]: Without dead ends: 946 [2021-03-10 21:51:38,149 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 730.6ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:38,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-03-10 21:51:38,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 839. [2021-03-10 21:51:38,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 3.1336515513126493) internal successors, (2626), 838 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:38,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2626 transitions. [2021-03-10 21:51:38,158 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2626 transitions. Word has length 24 [2021-03-10 21:51:38,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:38,159 INFO L480 AbstractCegarLoop]: Abstraction has 839 states and 2626 transitions. [2021-03-10 21:51:38,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:38,159 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2626 transitions. [2021-03-10 21:51:38,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:38,160 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:38,160 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:38,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:38,360 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:38,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:38,361 INFO L82 PathProgramCache]: Analyzing trace with hash -781369598, now seen corresponding path program 68 times [2021-03-10 21:51:38,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:38,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5946570] [2021-03-10 21:51:38,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:51:38,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5946570] [2021-03-10 21:51:38,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153117867] [2021-03-10 21:51:38,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:38,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:51:38,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:38,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:51:38,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:38,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:38,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:38,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:38,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:38,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:38,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:38,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:38,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:38,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:51:38,704 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:93, output treesize:79 [2021-03-10 21:51:38,791 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-03-10 21:51:38,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:38,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:38,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:38,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:38,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:38,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:38,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:38,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:38,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:38,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:38,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:38,805 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:38,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:38,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:38,809 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:38,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:38,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:38,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:38,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:51:38,892 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:38,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:38,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:38,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:38,897 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:38,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:38,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:38,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:51:38,903 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:38,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:38,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:38,908 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:38,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:38,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:51:38,982 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:81 [2021-03-10 21:51:39,155 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:51:39,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:39,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:39,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319461549] [2021-03-10 21:51:39,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:39,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:39,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:39,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:39,156 INFO L87 Difference]: Start difference. First operand 839 states and 2626 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:40,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:40,128 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-03-10 21:51:40,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:51:40,129 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:40,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:40,131 INFO L225 Difference]: With dead ends: 1258 [2021-03-10 21:51:40,131 INFO L226 Difference]: Without dead ends: 1155 [2021-03-10 21:51:40,131 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 883.1ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:51:40,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-03-10 21:51:40,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 864. [2021-03-10 21:51:40,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.171494785631518) internal successors, (2737), 863 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:40,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2737 transitions. [2021-03-10 21:51:40,142 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2737 transitions. Word has length 24 [2021-03-10 21:51:40,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:40,142 INFO L480 AbstractCegarLoop]: Abstraction has 864 states and 2737 transitions. [2021-03-10 21:51:40,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:40,143 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2737 transitions. [2021-03-10 21:51:40,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:40,144 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:40,144 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:40,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-03-10 21:51:40,359 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:40,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:40,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2007079852, now seen corresponding path program 69 times [2021-03-10 21:51:40,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:40,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287284728] [2021-03-10 21:51:40,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:40,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287284728] [2021-03-10 21:51:40,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635278054] [2021-03-10 21:51:40,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:40,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:51:40,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:40,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:51:40,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:40,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:40,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:40,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:40,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:40,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:40,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:40,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:40,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:40,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:40,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:40,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:40,701 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:40,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:40,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:40,704 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:40,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:40,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:51:40,776 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-03-10 21:51:41,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:41,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:41,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:51:41,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:41,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:41,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:51:41,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:41,140 INFO L628 ElimStorePlain]: treesize reduction 38, result has 43.3 percent of original size [2021-03-10 21:51:41,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:41,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:41,144 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:41,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:41,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:51:41,155 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:89, output treesize:12 [2021-03-10 21:51:41,199 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:41,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:41,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:41,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768048191] [2021-03-10 21:51:41,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:41,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:41,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:41,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:41,200 INFO L87 Difference]: Start difference. First operand 864 states and 2737 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:41,494 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2021-03-10 21:51:41,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:41,804 INFO L93 Difference]: Finished difference Result 1082 states and 3301 transitions. [2021-03-10 21:51:41,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:51:41,804 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:41,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:41,806 INFO L225 Difference]: With dead ends: 1082 [2021-03-10 21:51:41,806 INFO L226 Difference]: Without dead ends: 934 [2021-03-10 21:51:41,806 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 696.2ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:51:41,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-03-10 21:51:41,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 884. [2021-03-10 21:51:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.169875424688562) internal successors, (2799), 883 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:41,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2799 transitions. [2021-03-10 21:51:41,817 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2799 transitions. Word has length 24 [2021-03-10 21:51:41,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:41,817 INFO L480 AbstractCegarLoop]: Abstraction has 884 states and 2799 transitions. [2021-03-10 21:51:41,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:41,817 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2799 transitions. [2021-03-10 21:51:41,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:41,818 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:41,818 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:42,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable610,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:42,019 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:42,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:42,019 INFO L82 PathProgramCache]: Analyzing trace with hash 549915628, now seen corresponding path program 70 times [2021-03-10 21:51:42,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:42,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448101489] [2021-03-10 21:51:42,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:42,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448101489] [2021-03-10 21:51:42,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905560537] [2021-03-10 21:51:42,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:42,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:51:42,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:42,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:51:42,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:42,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:42,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:42,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:42,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:42,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:42,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:42,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:42,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:42,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:42,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:42,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:42,355 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:42,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:42,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:42,359 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:42,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:42,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:51:42,430 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-03-10 21:51:42,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:42,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:42,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:42,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:42,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:42,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:42,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:42,810 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 21:51:42,811 INFO L628 ElimStorePlain]: treesize reduction 66, result has 59.5 percent of original size [2021-03-10 21:51:42,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:42,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:42,816 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:42,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:42,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:42,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:42,871 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:42,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:42,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:42,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:42,922 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:42,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:42,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:51:42,967 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:177, output treesize:47 [2021-03-10 21:51:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:43,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:43,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:43,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241181449] [2021-03-10 21:51:43,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:43,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:43,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:43,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:43,064 INFO L87 Difference]: Start difference. First operand 884 states and 2799 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:43,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:43,625 INFO L93 Difference]: Finished difference Result 1186 states and 3573 transitions. [2021-03-10 21:51:43,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:51:43,626 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:43,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:43,627 INFO L225 Difference]: With dead ends: 1186 [2021-03-10 21:51:43,628 INFO L226 Difference]: Without dead ends: 1094 [2021-03-10 21:51:43,628 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 595.2ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:51:43,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-03-10 21:51:43,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 890. [2021-03-10 21:51:43,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.1788526434195727) internal successors, (2826), 889 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:43,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 2826 transitions. [2021-03-10 21:51:43,640 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 2826 transitions. Word has length 24 [2021-03-10 21:51:43,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:43,640 INFO L480 AbstractCegarLoop]: Abstraction has 890 states and 2826 transitions. [2021-03-10 21:51:43,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:43,640 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 2826 transitions. [2021-03-10 21:51:43,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:43,641 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:43,641 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:43,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable617 [2021-03-10 21:51:43,851 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:43,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:43,851 INFO L82 PathProgramCache]: Analyzing trace with hash 56161842, now seen corresponding path program 71 times [2021-03-10 21:51:43,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:43,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131994025] [2021-03-10 21:51:43,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:44,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131994025] [2021-03-10 21:51:44,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261399099] [2021-03-10 21:51:44,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:44,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:51:44,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:44,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:51:44,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:44,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:44,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:44,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:44,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:44,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:44,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:44,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:44,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:44,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:44,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:44,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:44,204 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:44,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:44,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:44,208 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:44,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:44,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:51:44,280 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-03-10 21:51:44,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:44,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:44,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:51:44,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:44,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:44,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:51:44,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:44,547 INFO L628 ElimStorePlain]: treesize reduction 44, result has 39.7 percent of original size [2021-03-10 21:51:44,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:44,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:44,551 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:44,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:44,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:51:44,562 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:89, output treesize:12 [2021-03-10 21:51:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:44,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:44,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:44,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527025706] [2021-03-10 21:51:44,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:44,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:44,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:44,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:44,616 INFO L87 Difference]: Start difference. First operand 890 states and 2826 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:45,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:45,172 INFO L93 Difference]: Finished difference Result 1181 states and 3572 transitions. [2021-03-10 21:51:45,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:51:45,173 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:45,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:45,174 INFO L225 Difference]: With dead ends: 1181 [2021-03-10 21:51:45,175 INFO L226 Difference]: Without dead ends: 1009 [2021-03-10 21:51:45,175 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 540.2ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:51:45,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-03-10 21:51:45,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 903. [2021-03-10 21:51:45,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 3.182926829268293) internal successors, (2871), 902 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:45,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 2871 transitions. [2021-03-10 21:51:45,186 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 2871 transitions. Word has length 24 [2021-03-10 21:51:45,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:45,186 INFO L480 AbstractCegarLoop]: Abstraction has 903 states and 2871 transitions. [2021-03-10 21:51:45,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:45,186 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 2871 transitions. [2021-03-10 21:51:45,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:45,188 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:45,188 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:45,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:45,391 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:45,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:45,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1264424876, now seen corresponding path program 72 times [2021-03-10 21:51:45,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:45,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114470316] [2021-03-10 21:51:45,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:45,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114470316] [2021-03-10 21:51:45,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576844401] [2021-03-10 21:51:45,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:51:45,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:51:45,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:45,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:51:45,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:45,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:45,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:45,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:45,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:45,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:45,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:45,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:45,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:45,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:45,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:45,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:45,775 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:45,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:45,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:45,779 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:45,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:45,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:51:45,850 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-03-10 21:51:46,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:46,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:46,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:46,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:46,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:46,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:46,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:46,243 INFO L628 ElimStorePlain]: treesize reduction 92, result has 46.2 percent of original size [2021-03-10 21:51:46,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:46,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:46,248 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:46,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:46,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:46,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:46,288 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:46,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:46,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:46,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:46,325 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:46,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:46,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:51:46,356 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:185, output treesize:34 [2021-03-10 21:51:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:46,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:46,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:46,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077710035] [2021-03-10 21:51:46,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:46,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:46,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:46,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:46,443 INFO L87 Difference]: Start difference. First operand 903 states and 2871 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:46,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:46,905 INFO L93 Difference]: Finished difference Result 1141 states and 3509 transitions. [2021-03-10 21:51:46,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:51:46,906 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:46,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:46,907 INFO L225 Difference]: With dead ends: 1141 [2021-03-10 21:51:46,907 INFO L226 Difference]: Without dead ends: 1050 [2021-03-10 21:51:46,908 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 597.0ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:51:46,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-03-10 21:51:46,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 896. [2021-03-10 21:51:46,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.184357541899441) internal successors, (2850), 895 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:46,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2850 transitions. [2021-03-10 21:51:46,918 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2850 transitions. Word has length 24 [2021-03-10 21:51:46,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:46,919 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2850 transitions. [2021-03-10 21:51:46,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:46,919 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2850 transitions. [2021-03-10 21:51:46,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:46,920 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:46,920 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:47,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable633 [2021-03-10 21:51:47,120 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:47,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:47,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1438317046, now seen corresponding path program 73 times [2021-03-10 21:51:47,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:47,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615263630] [2021-03-10 21:51:47,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:47,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615263630] [2021-03-10 21:51:47,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365508247] [2021-03-10 21:51:47,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:47,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:51:47,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:47,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:47,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:47,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:47,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:47,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:47,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:47,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:47,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:47,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:47,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:47,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:47,466 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:47,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:47,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:47,470 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:47,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:47,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:51:47,542 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-03-10 21:51:47,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:47,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:47,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:47,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:47,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:47,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:47,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:47,990 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2021-03-10 21:51:47,991 INFO L628 ElimStorePlain]: treesize reduction 158, result has 57.4 percent of original size [2021-03-10 21:51:47,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:47,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:47,996 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:48,106 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-03-10 21:51:48,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:48,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:48,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:48,112 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:48,221 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-10 21:51:48,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:48,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:48,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:48,227 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:48,332 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-03-10 21:51:48,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:48,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:48,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:48,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:48,339 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:48,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:51:48,344 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:48,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:48,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:48,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:48,448 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:48,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:48,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:48,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:48,552 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:48,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:48,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:48,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:48,649 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:48,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:48,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:51:48,737 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:385, output treesize:96 [2021-03-10 21:51:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:48,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:48,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:51:48,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857017097] [2021-03-10 21:51:48,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:51:48,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:48,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:51:48,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:51:48,907 INFO L87 Difference]: Start difference. First operand 896 states and 2850 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:49,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:49,587 INFO L93 Difference]: Finished difference Result 1257 states and 3802 transitions. [2021-03-10 21:51:49,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:51:49,587 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:49,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:49,589 INFO L225 Difference]: With dead ends: 1257 [2021-03-10 21:51:49,589 INFO L226 Difference]: Without dead ends: 1169 [2021-03-10 21:51:49,589 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 709.8ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:49,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-03-10 21:51:49,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 906. [2021-03-10 21:51:49,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.205524861878453) internal successors, (2901), 905 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:49,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2901 transitions. [2021-03-10 21:51:49,601 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2901 transitions. Word has length 24 [2021-03-10 21:51:49,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:49,601 INFO L480 AbstractCegarLoop]: Abstraction has 906 states and 2901 transitions. [2021-03-10 21:51:49,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:49,602 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2901 transitions. [2021-03-10 21:51:49,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:49,603 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:49,603 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:49,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable641,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:49,805 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:49,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:49,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1976376714, now seen corresponding path program 74 times [2021-03-10 21:51:49,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:49,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947219189] [2021-03-10 21:51:49,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:51:50,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947219189] [2021-03-10 21:51:50,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630768073] [2021-03-10 21:51:50,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:50,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:51:50,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:50,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:51:50,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:50,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:50,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:50,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:50,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:50,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:50,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:50,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:50,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:50,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:50,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:50,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:50,240 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:50,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:50,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:50,244 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:50,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:50,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:51:50,328 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-03-10 21:51:50,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:50,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:50,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:50,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:50,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:50,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:50,577 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:50,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:50,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:50,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:50,661 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:50,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:50,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:50,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:50,744 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:50,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:50,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:50,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:50,828 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:50,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:50,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:50,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:50,907 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:50,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:50,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:50,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:50,994 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:51,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:51,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:51,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:51,066 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:51,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:51,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:51:51,132 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:193, output treesize:69 [2021-03-10 21:51:51,279 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:51:51,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:51,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:51,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085568589] [2021-03-10 21:51:51,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:51,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:51,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:51,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:51,280 INFO L87 Difference]: Start difference. First operand 906 states and 2901 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:51,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:51,764 INFO L93 Difference]: Finished difference Result 1277 states and 3859 transitions. [2021-03-10 21:51:51,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:51:51,765 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:51,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:51,766 INFO L225 Difference]: With dead ends: 1277 [2021-03-10 21:51:51,766 INFO L226 Difference]: Without dead ends: 1239 [2021-03-10 21:51:51,766 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 668.3ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:51:51,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-03-10 21:51:51,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 904. [2021-03-10 21:51:51,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.201550387596899) internal successors, (2891), 903 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:51,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2891 transitions. [2021-03-10 21:51:51,778 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2891 transitions. Word has length 24 [2021-03-10 21:51:51,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:51,778 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 2891 transitions. [2021-03-10 21:51:51,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:51,778 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2891 transitions. [2021-03-10 21:51:51,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:51,779 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:51,779 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:51,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable649 [2021-03-10 21:51:51,994 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:51,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:51,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1969687262, now seen corresponding path program 75 times [2021-03-10 21:51:51,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:51,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126813300] [2021-03-10 21:51:51,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:51,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:52,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126813300] [2021-03-10 21:51:52,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554380305] [2021-03-10 21:51:52,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:52,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:51:52,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:52,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:51:52,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:52,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:52,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:52,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:52,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:52,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:52,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:52,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:52,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:52,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-03-10 21:51:52,422 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:79, output treesize:65 [2021-03-10 21:51:52,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:52,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:52,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:52,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:52,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:52,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:52,550 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:52,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:52,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:51:52,560 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:35, output treesize:11 [2021-03-10 21:51:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:52,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:52,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:52,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672446963] [2021-03-10 21:51:52,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:52,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:52,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:52,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:52,611 INFO L87 Difference]: Start difference. First operand 904 states and 2891 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:52,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:52,895 INFO L93 Difference]: Finished difference Result 1023 states and 3183 transitions. [2021-03-10 21:51:52,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:51:52,896 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:52,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:52,897 INFO L225 Difference]: With dead ends: 1023 [2021-03-10 21:51:52,897 INFO L226 Difference]: Without dead ends: 964 [2021-03-10 21:51:52,898 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 422.8ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:51:52,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2021-03-10 21:51:52,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 892. [2021-03-10 21:51:52,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.1986531986531985) internal successors, (2850), 891 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:52,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2850 transitions. [2021-03-10 21:51:52,908 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2850 transitions. Word has length 24 [2021-03-10 21:51:52,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:52,908 INFO L480 AbstractCegarLoop]: Abstraction has 892 states and 2850 transitions. [2021-03-10 21:51:52,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:52,908 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2850 transitions. [2021-03-10 21:51:52,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:52,909 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:52,909 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:53,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable657,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:53,112 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:53,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:53,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1879028642, now seen corresponding path program 76 times [2021-03-10 21:51:53,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:53,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853454979] [2021-03-10 21:51:53,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:53,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853454979] [2021-03-10 21:51:53,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026025906] [2021-03-10 21:51:53,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:53,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:51:53,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:53,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:51:53,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:53,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:53,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:53,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:53,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:53,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:53,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:53,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:53,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:53,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-03-10 21:51:53,524 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:79, output treesize:65 [2021-03-10 21:51:53,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:53,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:53,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:53,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:53,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:53,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:53,719 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:53,817 INFO L628 ElimStorePlain]: treesize reduction 92, result has 46.2 percent of original size [2021-03-10 21:51:53,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:53,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:53,821 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:53,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:53,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:53,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:53,859 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:53,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:53,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:53,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:53,897 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:53,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:53,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:51:53,929 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:185, output treesize:34 [2021-03-10 21:51:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:54,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:54,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:54,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651333245] [2021-03-10 21:51:54,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:54,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:54,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:54,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:54,012 INFO L87 Difference]: Start difference. First operand 892 states and 2850 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:54,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:54,588 INFO L93 Difference]: Finished difference Result 1224 states and 3709 transitions. [2021-03-10 21:51:54,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:51:54,588 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:54,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:54,589 INFO L225 Difference]: With dead ends: 1224 [2021-03-10 21:51:54,589 INFO L226 Difference]: Without dead ends: 1106 [2021-03-10 21:51:54,590 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 578.5ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:54,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-03-10 21:51:54,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 895. [2021-03-10 21:51:54,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.192393736017897) internal successors, (2854), 894 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:54,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 2854 transitions. [2021-03-10 21:51:54,600 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 2854 transitions. Word has length 24 [2021-03-10 21:51:54,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:54,600 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 2854 transitions. [2021-03-10 21:51:54,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:54,600 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 2854 transitions. [2021-03-10 21:51:54,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:54,601 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:54,601 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:54,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-03-10 21:51:54,802 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:54,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:54,802 INFO L82 PathProgramCache]: Analyzing trace with hash -934962452, now seen corresponding path program 77 times [2021-03-10 21:51:54,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:54,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956539902] [2021-03-10 21:51:54,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:55,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956539902] [2021-03-10 21:51:55,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670847489] [2021-03-10 21:51:55,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:51:55,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:51:55,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:55,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:51:55,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:55,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:51:55,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:55,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:51:55,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:55,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:55,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:51:55,149 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-03-10 21:51:55,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:51:55,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:55,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:51:55,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:55,266 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-03-10 21:51:55,266 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:51:55,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:51:55,269 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:55,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:55,294 INFO L518 ElimStorePlain]: Eliminatee v_prenex_374 vanished before elimination [2021-03-10 21:51:55,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:51:55,295 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:40 [2021-03-10 21:51:55,371 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:55,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:55,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 21:51:55,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739067174] [2021-03-10 21:51:55,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:51:55,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:55,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:51:55,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:51:55,372 INFO L87 Difference]: Start difference. First operand 895 states and 2854 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:55,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:55,770 INFO L93 Difference]: Finished difference Result 1140 states and 3547 transitions. [2021-03-10 21:51:55,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:51:55,771 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:55,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:55,773 INFO L225 Difference]: With dead ends: 1140 [2021-03-10 21:51:55,773 INFO L226 Difference]: Without dead ends: 1049 [2021-03-10 21:51:55,773 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 446.6ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:51:55,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-03-10 21:51:55,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 895. [2021-03-10 21:51:55,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.192393736017897) internal successors, (2854), 894 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:55,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 2854 transitions. [2021-03-10 21:51:55,784 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 2854 transitions. Word has length 24 [2021-03-10 21:51:55,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:55,784 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 2854 transitions. [2021-03-10 21:51:55,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:55,784 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 2854 transitions. [2021-03-10 21:51:55,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:55,785 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:55,785 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:55,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable667 [2021-03-10 21:51:55,986 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:55,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:55,986 INFO L82 PathProgramCache]: Analyzing trace with hash -303757950, now seen corresponding path program 78 times [2021-03-10 21:51:55,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:55,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745601796] [2021-03-10 21:51:55,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:56,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745601796] [2021-03-10 21:51:56,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385483576] [2021-03-10 21:51:56,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:56,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:51:56,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:56,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:51:56,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:56,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:56,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:56,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:56,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:56,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:56,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:56,355 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:56,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:56,359 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:56,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:56,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:51:56,421 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:51:56,554 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-03-10 21:51:56,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:56,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:56,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:56,565 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:56,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:56,570 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:56,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:56,576 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:56,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:56,581 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:56,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:56,586 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:56,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:56,592 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:56,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:56,597 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:56,811 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-03-10 21:51:56,811 INFO L628 ElimStorePlain]: treesize reduction 159, result has 52.8 percent of original size [2021-03-10 21:51:56,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:56,817 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:56,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:56,823 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:56,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:56,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:51:56,828 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:56,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:56,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:51:56,911 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:385, output treesize:96 [2021-03-10 21:51:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:57,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:57,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:51:57,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329371079] [2021-03-10 21:51:57,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:51:57,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:57,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:51:57,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:51:57,078 INFO L87 Difference]: Start difference. First operand 895 states and 2854 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:57,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:57,688 INFO L93 Difference]: Finished difference Result 1265 states and 3894 transitions. [2021-03-10 21:51:57,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:51:57,688 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:57,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:57,690 INFO L225 Difference]: With dead ends: 1265 [2021-03-10 21:51:57,690 INFO L226 Difference]: Without dead ends: 1185 [2021-03-10 21:51:57,690 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 600.5ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:57,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-03-10 21:51:57,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 909. [2021-03-10 21:51:57,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 3.2059471365638768) internal successors, (2911), 908 states have internal predecessors, (2911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:57,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 2911 transitions. [2021-03-10 21:51:57,701 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 2911 transitions. Word has length 24 [2021-03-10 21:51:57,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:57,701 INFO L480 AbstractCegarLoop]: Abstraction has 909 states and 2911 transitions. [2021-03-10 21:51:57,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:57,701 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 2911 transitions. [2021-03-10 21:51:57,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:57,702 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:57,702 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:57,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-03-10 21:51:57,903 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:57,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:57,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1647329100, now seen corresponding path program 79 times [2021-03-10 21:51:57,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:57,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325606554] [2021-03-10 21:51:57,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:58,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325606554] [2021-03-10 21:51:58,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012440758] [2021-03-10 21:51:58,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:58,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:51:58,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:58,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:58,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:58,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:58,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:58,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:58,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:58,293 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:58,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:58,297 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:58,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:58,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:51:58,358 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:51:58,479 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-03-10 21:51:58,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:58,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:58,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:58,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:58,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:58,495 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:58,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:58,501 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:58,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:58,508 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:58,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:58,514 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:58,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:58,521 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:58,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:58,527 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:58,738 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-03-10 21:51:58,738 INFO L628 ElimStorePlain]: treesize reduction 159, result has 52.8 percent of original size [2021-03-10 21:51:58,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:58,744 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:58,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:58,750 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:58,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:58,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:51:58,755 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:58,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:58,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:51:58,839 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:385, output treesize:96 [2021-03-10 21:51:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:51:59,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:59,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:51:59,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61470760] [2021-03-10 21:51:59,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:59,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:59,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:59,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:59,009 INFO L87 Difference]: Start difference. First operand 909 states and 2911 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:59,379 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-10 21:51:59,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:59,677 INFO L93 Difference]: Finished difference Result 1257 states and 3842 transitions. [2021-03-10 21:51:59,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:51:59,677 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:51:59,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:59,679 INFO L225 Difference]: With dead ends: 1257 [2021-03-10 21:51:59,679 INFO L226 Difference]: Without dead ends: 1180 [2021-03-10 21:51:59,679 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 763.9ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:51:59,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-03-10 21:51:59,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 919. [2021-03-10 21:51:59,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 3.2004357298474946) internal successors, (2938), 918 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:59,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2938 transitions. [2021-03-10 21:51:59,690 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2938 transitions. Word has length 24 [2021-03-10 21:51:59,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:59,690 INFO L480 AbstractCegarLoop]: Abstraction has 919 states and 2938 transitions. [2021-03-10 21:51:59,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:59,690 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2938 transitions. [2021-03-10 21:51:59,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:51:59,692 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:59,692 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:59,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:59,892 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:59,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:59,892 INFO L82 PathProgramCache]: Analyzing trace with hash 470446420, now seen corresponding path program 80 times [2021-03-10 21:51:59,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:59,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260477761] [2021-03-10 21:51:59,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:00,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260477761] [2021-03-10 21:52:00,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014653576] [2021-03-10 21:52:00,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:00,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:52:00,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:00,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:52:00,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:00,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:00,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:00,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:00,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:00,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:00,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:00,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:00,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:00,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:00,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:00,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:00,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:00,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:00,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:00,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:00,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:00,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:52:00,334 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:52:00,487 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-03-10 21:52:00,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:00,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:00,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:00,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:00,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:00,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:00,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:00,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:00,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:00,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:00,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:00,532 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:00,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:00,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:00,536 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:00,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:00,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:52:00,566 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:83, output treesize:31 [2021-03-10 21:52:00,667 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:00,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:00,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:52:00,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070834368] [2021-03-10 21:52:00,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:52:00,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:00,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:52:00,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:52:00,668 INFO L87 Difference]: Start difference. First operand 919 states and 2938 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:00,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:00,935 INFO L93 Difference]: Finished difference Result 1144 states and 3551 transitions. [2021-03-10 21:52:00,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:52:00,935 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:00,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:00,937 INFO L225 Difference]: With dead ends: 1144 [2021-03-10 21:52:00,937 INFO L226 Difference]: Without dead ends: 1082 [2021-03-10 21:52:00,937 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 421.6ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:52:00,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-03-10 21:52:00,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 899. [2021-03-10 21:52:00,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.1915367483296215) internal successors, (2866), 898 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:00,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2866 transitions. [2021-03-10 21:52:00,948 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2866 transitions. Word has length 24 [2021-03-10 21:52:00,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:00,948 INFO L480 AbstractCegarLoop]: Abstraction has 899 states and 2866 transitions. [2021-03-10 21:52:00,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:00,948 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2866 transitions. [2021-03-10 21:52:00,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:00,950 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:00,950 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:01,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-03-10 21:52:01,150 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:01,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:01,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1416139284, now seen corresponding path program 81 times [2021-03-10 21:52:01,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:01,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040931995] [2021-03-10 21:52:01,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:01,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040931995] [2021-03-10 21:52:01,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803568779] [2021-03-10 21:52:01,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:01,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:52:01,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:01,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:52:01,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:01,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:01,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:01,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:01,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:01,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:01,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:01,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:01,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:01,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:01,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:01,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:01,497 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:01,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:01,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:01,501 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:01,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:01,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:52:01,583 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:197, output treesize:169 [2021-03-10 21:52:01,817 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-03-10 21:52:01,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:01,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:01,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:01,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:01,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:01,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:01,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:01,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:01,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:01,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:01,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:01,831 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:01,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:01,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:01,835 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:01,942 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-10 21:52:01,943 INFO L628 ElimStorePlain]: treesize reduction 55, result has 64.5 percent of original size [2021-03-10 21:52:01,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:01,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:01,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:52:01,948 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:01,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:01,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:52:01,953 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:02,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:02,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:52:02,003 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:181, output treesize:47 [2021-03-10 21:52:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:02,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:02,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:52:02,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206481707] [2021-03-10 21:52:02,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:52:02,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:02,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:52:02,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:52:02,101 INFO L87 Difference]: Start difference. First operand 899 states and 2866 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:02,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:02,666 INFO L93 Difference]: Finished difference Result 1006 states and 3175 transitions. [2021-03-10 21:52:02,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:52:02,666 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:02,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:02,668 INFO L225 Difference]: With dead ends: 1006 [2021-03-10 21:52:02,668 INFO L226 Difference]: Without dead ends: 953 [2021-03-10 21:52:02,668 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 602.2ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:52:02,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-03-10 21:52:02,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 905. [2021-03-10 21:52:02,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 3.191371681415929) internal successors, (2885), 904 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:02,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 2885 transitions. [2021-03-10 21:52:02,678 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 2885 transitions. Word has length 24 [2021-03-10 21:52:02,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:02,679 INFO L480 AbstractCegarLoop]: Abstraction has 905 states and 2885 transitions. [2021-03-10 21:52:02,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:02,679 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 2885 transitions. [2021-03-10 21:52:02,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:02,680 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:02,680 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:02,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable699,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:02,895 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:02,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:02,897 INFO L82 PathProgramCache]: Analyzing trace with hash 910497546, now seen corresponding path program 82 times [2021-03-10 21:52:02,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:02,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024487804] [2021-03-10 21:52:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:03,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024487804] [2021-03-10 21:52:03,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546230812] [2021-03-10 21:52:03,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:03,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:52:03,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:03,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:52:03,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:03,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:03,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:03,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:03,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:03,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:03,318 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:03,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:03,322 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:03,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:03,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:52:03,411 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:197, output treesize:169 [2021-03-10 21:52:03,574 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-03-10 21:52:03,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:03,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:03,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:03,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:03,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:03,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:03,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:03,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:03,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:03,604 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:03,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:03,610 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:03,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:03,615 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:03,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:03,620 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:03,894 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-03-10 21:52:03,894 INFO L628 ElimStorePlain]: treesize reduction 168, result has 53.2 percent of original size [2021-03-10 21:52:03,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:52:03,900 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:03,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:52:03,913 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:03,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:03,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:52:03,919 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:04,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:04,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:52:04,014 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:409, output treesize:96 [2021-03-10 21:52:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:04,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:04,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:52:04,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958392618] [2021-03-10 21:52:04,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:52:04,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:04,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:52:04,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:52:04,191 INFO L87 Difference]: Start difference. First operand 905 states and 2885 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:04,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:04,869 INFO L93 Difference]: Finished difference Result 1122 states and 3488 transitions. [2021-03-10 21:52:04,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:52:04,869 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:04,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:04,872 INFO L225 Difference]: With dead ends: 1122 [2021-03-10 21:52:04,872 INFO L226 Difference]: Without dead ends: 1042 [2021-03-10 21:52:04,872 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 866.6ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:52:04,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-03-10 21:52:04,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 908. [2021-03-10 21:52:04,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 3.1918412348401324) internal successors, (2895), 907 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:04,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 2895 transitions. [2021-03-10 21:52:04,882 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 2895 transitions. Word has length 24 [2021-03-10 21:52:04,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:04,882 INFO L480 AbstractCegarLoop]: Abstraction has 908 states and 2895 transitions. [2021-03-10 21:52:04,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:04,883 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 2895 transitions. [2021-03-10 21:52:04,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:04,884 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:04,884 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:05,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable711 [2021-03-10 21:52:05,084 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:05,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:05,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1784879286, now seen corresponding path program 83 times [2021-03-10 21:52:05,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:05,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82281038] [2021-03-10 21:52:05,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:05,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82281038] [2021-03-10 21:52:05,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428526231] [2021-03-10 21:52:05,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:05,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:52:05,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:05,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:52:05,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:05,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:05,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:05,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:05,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:05,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:05,478 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:05,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:05,481 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:05,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:05,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:52:05,537 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:153, output treesize:125 [2021-03-10 21:52:05,631 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-10 21:52:05,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-03-10 21:52:05,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:05,643 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-10 21:52:05,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-03-10 21:52:05,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:05,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:05,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-03-10 21:52:05,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:52:05,662 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 21:52:05,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 17 [2021-03-10 21:52:05,663 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:05,673 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-10 21:52:05,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-03-10 21:52:05,674 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:05,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:05,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2021-03-10 21:52:05,685 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-03-10 21:52:05,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:05,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2021-03-10 21:52:05,696 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-03-10 21:52:05,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:05,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2021-03-10 21:52:05,706 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-03-10 21:52:05,929 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-03-10 21:52:05,929 INFO L628 ElimStorePlain]: treesize reduction 43, result has 83.5 percent of original size [2021-03-10 21:52:05,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:05,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:05,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-03-10 21:52:05,935 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:05,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:05,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:05,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-03-10 21:52:05,944 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:05,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:06,053 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 21:52:06,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:06,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 21:52:06,056 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 2 variables, input treesize:353, output treesize:197 [2021-03-10 21:52:06,570 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:06,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:06,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-03-10 21:52:06,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246095589] [2021-03-10 21:52:06,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:52:06,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:06,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:52:06,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:52:06,571 INFO L87 Difference]: Start difference. First operand 908 states and 2895 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 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) [2021-03-10 21:52:06,995 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-03-10 21:52:07,311 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-03-10 21:52:07,579 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-03-10 21:52:07,817 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-03-10 21:52:08,064 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-10 21:52:08,235 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-03-10 21:52:08,383 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2021-03-10 21:52:08,532 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-03-10 21:52:08,760 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-03-10 21:52:08,907 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2021-03-10 21:52:09,086 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-10 21:52:09,361 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2021-03-10 21:52:09,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:09,575 INFO L93 Difference]: Finished difference Result 1671 states and 5046 transitions. [2021-03-10 21:52:09,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:52:09,576 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 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 24 [2021-03-10 21:52:09,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:09,578 INFO L225 Difference]: With dead ends: 1671 [2021-03-10 21:52:09,578 INFO L226 Difference]: Without dead ends: 1569 [2021-03-10 21:52:09,578 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 3183.9ms TimeCoverageRelationStatistics Valid=274, Invalid=1208, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:52:09,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2021-03-10 21:52:09,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1011. [2021-03-10 21:52:09,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 3.297029702970297) internal successors, (3330), 1010 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:09,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 3330 transitions. [2021-03-10 21:52:09,592 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 3330 transitions. Word has length 24 [2021-03-10 21:52:09,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:09,592 INFO L480 AbstractCegarLoop]: Abstraction has 1011 states and 3330 transitions. [2021-03-10 21:52:09,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 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) [2021-03-10 21:52:09,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 3330 transitions. [2021-03-10 21:52:09,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:09,593 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:09,593 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:09,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:09,795 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:09,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:09,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1115351558, now seen corresponding path program 84 times [2021-03-10 21:52:09,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:09,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201175103] [2021-03-10 21:52:09,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:10,085 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:10,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201175103] [2021-03-10 21:52:10,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346449642] [2021-03-10 21:52:10,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:10,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:52:10,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:10,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:52:10,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:10,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:10,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:10,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:10,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:10,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:10,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:10,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:10,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:10,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:10,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:10,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:10,208 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:10,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:10,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:10,212 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:10,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:10,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:52:10,277 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-03-10 21:52:10,404 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-03-10 21:52:10,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:10,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:10,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:10,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:10,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:10,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:10,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:10,415 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:10,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:10,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:10,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:10,420 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:10,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:10,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:10,424 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:10,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:10,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:10,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:10,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:52:10,500 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:10,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:10,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:10,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:10,506 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:10,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:10,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:10,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:10,512 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:10,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:10,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:52:10,517 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:10,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:10,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:52:10,584 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:185, output treesize:69 [2021-03-10 21:52:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:10,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:10,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:52:10,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010837689] [2021-03-10 21:52:10,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:52:10,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:10,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:52:10,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:52:10,763 INFO L87 Difference]: Start difference. First operand 1011 states and 3330 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:11,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:11,457 INFO L93 Difference]: Finished difference Result 1451 states and 4566 transitions. [2021-03-10 21:52:11,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:52:11,458 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:11,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:11,461 INFO L225 Difference]: With dead ends: 1451 [2021-03-10 21:52:11,461 INFO L226 Difference]: Without dead ends: 1342 [2021-03-10 21:52:11,461 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 877.5ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:52:11,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-03-10 21:52:11,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1038. [2021-03-10 21:52:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1037 states have (on average 3.3278688524590163) internal successors, (3451), 1037 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:11,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3451 transitions. [2021-03-10 21:52:11,474 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3451 transitions. Word has length 24 [2021-03-10 21:52:11,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:11,474 INFO L480 AbstractCegarLoop]: Abstraction has 1038 states and 3451 transitions. [2021-03-10 21:52:11,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:11,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3451 transitions. [2021-03-10 21:52:11,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:11,476 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:11,476 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:11,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:11,677 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:11,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:11,677 INFO L82 PathProgramCache]: Analyzing trace with hash -341147188, now seen corresponding path program 85 times [2021-03-10 21:52:11,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:11,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717300732] [2021-03-10 21:52:11,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:11,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717300732] [2021-03-10 21:52:11,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840053237] [2021-03-10 21:52:11,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:11,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:52:11,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:11,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:11,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:11,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:11,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:11,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:11,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:11,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:11,976 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:11,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:11,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:11,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:11,980 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:11,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:11,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:11,984 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:12,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:12,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:52:12,050 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-03-10 21:52:12,216 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-03-10 21:52:12,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:12,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:12,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:12,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:12,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:12,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:12,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:12,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:12,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:12,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:12,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:12,230 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:12,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:12,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:12,235 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:12,326 INFO L628 ElimStorePlain]: treesize reduction 93, result has 46.2 percent of original size [2021-03-10 21:52:12,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:12,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:12,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:12,331 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:12,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:12,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:12,336 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:12,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:12,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:52:12,374 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:197, output treesize:34 [2021-03-10 21:52:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:12,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:12,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:52:12,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119360973] [2021-03-10 21:52:12,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:52:12,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:12,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:52:12,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:52:12,465 INFO L87 Difference]: Start difference. First operand 1038 states and 3451 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:12,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:12,784 INFO L93 Difference]: Finished difference Result 1260 states and 4065 transitions. [2021-03-10 21:52:12,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:52:12,785 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:12,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:12,786 INFO L225 Difference]: With dead ends: 1260 [2021-03-10 21:52:12,787 INFO L226 Difference]: Without dead ends: 1137 [2021-03-10 21:52:12,787 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 469.8ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:52:12,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-03-10 21:52:12,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1020. [2021-03-10 21:52:12,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 3.3042198233562314) internal successors, (3367), 1019 states have internal predecessors, (3367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:12,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 3367 transitions. [2021-03-10 21:52:12,798 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 3367 transitions. Word has length 24 [2021-03-10 21:52:12,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:12,798 INFO L480 AbstractCegarLoop]: Abstraction has 1020 states and 3367 transitions. [2021-03-10 21:52:12,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:12,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 3367 transitions. [2021-03-10 21:52:12,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:12,800 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:12,800 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:13,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable738,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:13,000 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:13,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:13,000 INFO L82 PathProgramCache]: Analyzing trace with hash -927734326, now seen corresponding path program 86 times [2021-03-10 21:52:13,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:13,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717002021] [2021-03-10 21:52:13,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:13,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717002021] [2021-03-10 21:52:13,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007634523] [2021-03-10 21:52:13,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:13,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:52:13,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:13,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:52:13,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:13,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:13,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:13,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:13,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:13,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:13,234 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:13,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:13,237 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:13,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:13,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:52:13,270 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-03-10 21:52:13,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:52:13,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:13,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:13,407 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:52:13,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:52:13,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:11 [2021-03-10 21:52:13,447 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:13,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:13,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:52:13,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31389561] [2021-03-10 21:52:13,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:52:13,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:13,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:52:13,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:52:13,448 INFO L87 Difference]: Start difference. First operand 1020 states and 3367 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:14,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:14,303 INFO L93 Difference]: Finished difference Result 1662 states and 5162 transitions. [2021-03-10 21:52:14,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:52:14,304 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:14,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:14,306 INFO L225 Difference]: With dead ends: 1662 [2021-03-10 21:52:14,307 INFO L226 Difference]: Without dead ends: 1600 [2021-03-10 21:52:14,307 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 773.1ms TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:52:14,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-03-10 21:52:14,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1049. [2021-03-10 21:52:14,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 3.312022900763359) internal successors, (3471), 1048 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:14,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3471 transitions. [2021-03-10 21:52:14,328 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3471 transitions. Word has length 24 [2021-03-10 21:52:14,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:14,328 INFO L480 AbstractCegarLoop]: Abstraction has 1049 states and 3471 transitions. [2021-03-10 21:52:14,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:14,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3471 transitions. [2021-03-10 21:52:14,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:14,329 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:14,329 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:14,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable746 [2021-03-10 21:52:14,531 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:14,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:14,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1264972752, now seen corresponding path program 87 times [2021-03-10 21:52:14,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:14,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892945649] [2021-03-10 21:52:14,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:14,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892945649] [2021-03-10 21:52:14,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528832667] [2021-03-10 21:52:14,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:14,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:52:14,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:14,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:52:14,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:14,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:14,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:14,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:14,798 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:14,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:14,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:14,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:14,804 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:14,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:14,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:52:14,838 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-03-10 21:52:14,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:14,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:14,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:14,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:15,011 INFO L628 ElimStorePlain]: treesize reduction 29, result has 40.8 percent of original size [2021-03-10 21:52:15,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:52:15,014 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:15,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:15,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:52:15,021 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:63, output treesize:12 [2021-03-10 21:52:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:15,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:15,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:52:15,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300322310] [2021-03-10 21:52:15,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:52:15,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:15,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:52:15,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:52:15,065 INFO L87 Difference]: Start difference. First operand 1049 states and 3471 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:16,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:16,204 INFO L93 Difference]: Finished difference Result 1418 states and 4449 transitions. [2021-03-10 21:52:16,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:52:16,205 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:16,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:16,207 INFO L225 Difference]: With dead ends: 1418 [2021-03-10 21:52:16,207 INFO L226 Difference]: Without dead ends: 1332 [2021-03-10 21:52:16,207 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1119.5ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:52:16,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-03-10 21:52:16,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 1057. [2021-03-10 21:52:16,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 3.3077651515151514) internal successors, (3493), 1056 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:16,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 3493 transitions. [2021-03-10 21:52:16,220 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 3493 transitions. Word has length 24 [2021-03-10 21:52:16,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:16,220 INFO L480 AbstractCegarLoop]: Abstraction has 1057 states and 3493 transitions. [2021-03-10 21:52:16,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:16,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 3493 transitions. [2021-03-10 21:52:16,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:16,222 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:16,222 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:16,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable750 [2021-03-10 21:52:16,424 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:16,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:16,424 INFO L82 PathProgramCache]: Analyzing trace with hash -472999064, now seen corresponding path program 88 times [2021-03-10 21:52:16,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:16,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068951768] [2021-03-10 21:52:16,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:16,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068951768] [2021-03-10 21:52:16,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84973145] [2021-03-10 21:52:16,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:52:16,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:52:16,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:16,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:52:16,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:16,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:16,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:16,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:16,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:16,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:16,726 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:16,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:16,729 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:16,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:16,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:52:16,762 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-03-10 21:52:16,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:16,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:16,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:16,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:16,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:16,890 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:16,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:16,892 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:16,952 INFO L628 ElimStorePlain]: treesize reduction 42, result has 60.0 percent of original size [2021-03-10 21:52:16,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:52:16,956 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:16,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:16,959 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:16,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:16,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:52:16,987 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:133, output treesize:47 [2021-03-10 21:52:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:17,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:17,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:52:17,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517836718] [2021-03-10 21:52:17,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:52:17,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:17,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:52:17,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:52:17,078 INFO L87 Difference]: Start difference. First operand 1057 states and 3493 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:17,709 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-03-10 21:52:18,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:18,022 INFO L93 Difference]: Finished difference Result 1447 states and 4513 transitions. [2021-03-10 21:52:18,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:52:18,023 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:18,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:18,024 INFO L225 Difference]: With dead ends: 1447 [2021-03-10 21:52:18,025 INFO L226 Difference]: Without dead ends: 1359 [2021-03-10 21:52:18,025 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1032.6ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:52:18,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-03-10 21:52:18,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1045. [2021-03-10 21:52:18,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 3.3170498084291187) internal successors, (3463), 1044 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:18,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3463 transitions. [2021-03-10 21:52:18,037 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3463 transitions. Word has length 24 [2021-03-10 21:52:18,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:18,037 INFO L480 AbstractCegarLoop]: Abstraction has 1045 states and 3463 transitions. [2021-03-10 21:52:18,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:18,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3463 transitions. [2021-03-10 21:52:18,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:18,039 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:18,039 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:18,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable754,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:18,239 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:18,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:18,239 INFO L82 PathProgramCache]: Analyzing trace with hash -86455886, now seen corresponding path program 89 times [2021-03-10 21:52:18,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:18,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611234584] [2021-03-10 21:52:18,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:18,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611234584] [2021-03-10 21:52:18,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148106709] [2021-03-10 21:52:18,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:18,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:52:18,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:18,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:52:18,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:18,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:18,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:18,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:18,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:18,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:18,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:18,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:18,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:18,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:18,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:18,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:18,628 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:18,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:18,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:18,631 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:18,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:18,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:52:18,685 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-03-10 21:52:18,989 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-03-10 21:52:18,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:52:18,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:18,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:52:18,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:19,030 INFO L628 ElimStorePlain]: treesize reduction 41, result has 38.8 percent of original size [2021-03-10 21:52:19,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:19,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:52:19,034 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:19,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:19,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:52:19,044 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:12 [2021-03-10 21:52:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:19,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:19,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:52:19,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049940205] [2021-03-10 21:52:19,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:52:19,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:19,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:52:19,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:52:19,094 INFO L87 Difference]: Start difference. First operand 1045 states and 3463 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:19,702 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-03-10 21:52:20,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:20,114 INFO L93 Difference]: Finished difference Result 1393 states and 4386 transitions. [2021-03-10 21:52:20,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:52:20,115 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:20,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:20,117 INFO L225 Difference]: With dead ends: 1393 [2021-03-10 21:52:20,117 INFO L226 Difference]: Without dead ends: 1298 [2021-03-10 21:52:20,117 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1123.2ms TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:52:20,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2021-03-10 21:52:20,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1054. [2021-03-10 21:52:20,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1053 states have (on average 3.314339981006648) internal successors, (3490), 1053 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:20,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 3490 transitions. [2021-03-10 21:52:20,129 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 3490 transitions. Word has length 24 [2021-03-10 21:52:20,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:20,129 INFO L480 AbstractCegarLoop]: Abstraction has 1054 states and 3490 transitions. [2021-03-10 21:52:20,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:20,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 3490 transitions. [2021-03-10 21:52:20,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:20,130 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:20,131 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:20,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable759,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:20,331 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:20,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:20,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1824427702, now seen corresponding path program 90 times [2021-03-10 21:52:20,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:20,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314194438] [2021-03-10 21:52:20,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:20,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314194438] [2021-03-10 21:52:20,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076800219] [2021-03-10 21:52:20,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:20,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:52:20,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:20,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:52:20,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:20,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:20,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:20,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:20,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:20,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:20,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:20,690 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:20,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:20,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:20,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:20,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:20,750 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:20,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:20,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:20,754 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:20,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:20,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:52:20,808 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-03-10 21:52:21,060 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_408, o_4], 1=[o_0, v_prenex_407]} [2021-03-10 21:52:21,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:21,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:21,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:21,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:21,169 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-03-10 21:52:21,170 INFO L628 ElimStorePlain]: treesize reduction 56, result has 61.4 percent of original size [2021-03-10 21:52:21,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:21,173 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:21,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:21,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:21,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:21,221 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:21,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:21,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:21,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:52:21,268 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:21,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:21,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:52:21,308 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:157, output treesize:47 [2021-03-10 21:52:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:21,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:21,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:52:21,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640865315] [2021-03-10 21:52:21,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:52:21,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:21,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:52:21,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:52:21,411 INFO L87 Difference]: Start difference. First operand 1054 states and 3490 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:22,376 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-03-10 21:52:23,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:23,018 INFO L93 Difference]: Finished difference Result 1586 states and 4934 transitions. [2021-03-10 21:52:23,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:52:23,018 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:23,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:23,020 INFO L225 Difference]: With dead ends: 1586 [2021-03-10 21:52:23,020 INFO L226 Difference]: Without dead ends: 1506 [2021-03-10 21:52:23,021 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1620.0ms TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:52:23,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-03-10 21:52:23,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1059. [2021-03-10 21:52:23,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 3.3109640831758034) internal successors, (3503), 1058 states have internal predecessors, (3503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:23,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 3503 transitions. [2021-03-10 21:52:23,034 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 3503 transitions. Word has length 24 [2021-03-10 21:52:23,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:23,034 INFO L480 AbstractCegarLoop]: Abstraction has 1059 states and 3503 transitions. [2021-03-10 21:52:23,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:23,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 3503 transitions. [2021-03-10 21:52:23,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:23,036 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:23,036 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:23,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable765 [2021-03-10 21:52:23,236 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:23,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:23,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1976785808, now seen corresponding path program 91 times [2021-03-10 21:52:23,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:23,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195472986] [2021-03-10 21:52:23,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:23,407 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:23,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195472986] [2021-03-10 21:52:23,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824633010] [2021-03-10 21:52:23,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:23,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:52:23,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:23,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:23,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:23,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:23,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:23,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:23,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:23,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:23,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:23,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:23,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:23,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:23,605 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:23,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:23,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:23,610 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:23,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:23,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:52:23,672 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-03-10 21:52:23,931 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-03-10 21:52:23,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:23,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:23,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:23,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:23,969 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-03-10 21:52:23,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:23,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:23,973 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:23,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:23,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:52:23,992 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:12 [2021-03-10 21:52:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:24,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:24,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:52:24,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952028358] [2021-03-10 21:52:24,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:52:24,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:24,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:52:24,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:52:24,050 INFO L87 Difference]: Start difference. First operand 1059 states and 3503 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:25,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:25,280 INFO L93 Difference]: Finished difference Result 1506 states and 4716 transitions. [2021-03-10 21:52:25,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:52:25,281 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:25,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:25,283 INFO L225 Difference]: With dead ends: 1506 [2021-03-10 21:52:25,283 INFO L226 Difference]: Without dead ends: 1404 [2021-03-10 21:52:25,284 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1227.5ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:52:25,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-03-10 21:52:25,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1065. [2021-03-10 21:52:25,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 3.3148496240601504) internal successors, (3527), 1064 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:25,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 3527 transitions. [2021-03-10 21:52:25,297 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 3527 transitions. Word has length 24 [2021-03-10 21:52:25,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:25,298 INFO L480 AbstractCegarLoop]: Abstraction has 1065 states and 3527 transitions. [2021-03-10 21:52:25,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:25,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 3527 transitions. [2021-03-10 21:52:25,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:25,299 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:25,299 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:25,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-03-10 21:52:25,500 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:25,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:25,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1004167502, now seen corresponding path program 92 times [2021-03-10 21:52:25,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:25,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222683873] [2021-03-10 21:52:25,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:25,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222683873] [2021-03-10 21:52:25,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622562192] [2021-03-10 21:52:25,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:25,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:52:25,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:25,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:52:25,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:25,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:25,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:25,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:25,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:25,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:25,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:25,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:25,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:25,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:52:25,923 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:43 [2021-03-10 21:52:26,026 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_416, o_4], 1=[v_prenex_415, o_0]} [2021-03-10 21:52:26,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:26,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:26,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:26,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:26,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:26,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:26,104 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:26,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:26,108 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:26,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:26,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:26,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:26,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:26,173 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:26,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:26,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:26,178 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:26,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:26,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:26,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:26,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:52:26,243 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:26,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:26,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:52:26,248 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:26,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:26,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:52:26,304 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:153, output treesize:69 [2021-03-10 21:52:26,488 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:26,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:26,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:52:26,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694205381] [2021-03-10 21:52:26,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:52:26,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:26,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:52:26,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:52:26,489 INFO L87 Difference]: Start difference. First operand 1065 states and 3527 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:27,274 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-03-10 21:52:27,581 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2021-03-10 21:52:27,741 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-03-10 21:52:27,888 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-03-10 21:52:28,287 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-03-10 21:52:28,582 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-03-10 21:52:28,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:28,664 INFO L93 Difference]: Finished difference Result 1636 states and 5042 transitions. [2021-03-10 21:52:28,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:52:28,664 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:28,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:28,666 INFO L225 Difference]: With dead ends: 1636 [2021-03-10 21:52:28,666 INFO L226 Difference]: Without dead ends: 1562 [2021-03-10 21:52:28,667 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2092.5ms TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:52:28,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2021-03-10 21:52:28,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1076. [2021-03-10 21:52:28,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 1075 states have (on average 3.318139534883721) internal successors, (3567), 1075 states have internal predecessors, (3567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:28,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 3567 transitions. [2021-03-10 21:52:28,680 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 3567 transitions. Word has length 24 [2021-03-10 21:52:28,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:28,680 INFO L480 AbstractCegarLoop]: Abstraction has 1076 states and 3567 transitions. [2021-03-10 21:52:28,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:28,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 3567 transitions. [2021-03-10 21:52:28,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:28,682 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:28,682 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:28,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable780,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:28,882 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:28,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:28,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1991558598, now seen corresponding path program 93 times [2021-03-10 21:52:28,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:28,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085955851] [2021-03-10 21:52:28,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:29,044 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:29,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085955851] [2021-03-10 21:52:29,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034924971] [2021-03-10 21:52:29,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:29,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:52:29,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:29,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:52:29,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:29,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:52:29,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:29,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:29,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:52:29,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:22 [2021-03-10 21:52:29,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:52:29,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:29,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:52:29,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:29,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:29,281 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:52:29,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:52:29,282 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:31 [2021-03-10 21:52:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:29,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:29,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:52:29,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938572225] [2021-03-10 21:52:29,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:52:29,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:29,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:52:29,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:52:29,362 INFO L87 Difference]: Start difference. First operand 1076 states and 3567 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:30,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:30,415 INFO L93 Difference]: Finished difference Result 1795 states and 5645 transitions. [2021-03-10 21:52:30,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:52:30,415 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:30,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:30,418 INFO L225 Difference]: With dead ends: 1795 [2021-03-10 21:52:30,418 INFO L226 Difference]: Without dead ends: 1669 [2021-03-10 21:52:30,419 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 941.9ms TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:52:30,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-03-10 21:52:30,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1125. [2021-03-10 21:52:30,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 3.3354092526690393) internal successors, (3749), 1124 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:30,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 3749 transitions. [2021-03-10 21:52:30,433 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 3749 transitions. Word has length 24 [2021-03-10 21:52:30,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:30,433 INFO L480 AbstractCegarLoop]: Abstraction has 1125 states and 3749 transitions. [2021-03-10 21:52:30,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:30,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 3749 transitions. [2021-03-10 21:52:30,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:30,435 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:30,435 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:30,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable791,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:30,635 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:30,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:30,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1487928400, now seen corresponding path program 94 times [2021-03-10 21:52:30,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:30,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556308354] [2021-03-10 21:52:30,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:30,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:30,811 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:30,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556308354] [2021-03-10 21:52:30,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023203573] [2021-03-10 21:52:30,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:30,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:52:30,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:30,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:52:30,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:30,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:52:30,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:30,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:52:30,923 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:30,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:30,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:52:30,949 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-03-10 21:52:31,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:52:31,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:31,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:52:31,027 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:31,050 INFO L628 ElimStorePlain]: treesize reduction 24, result has 38.5 percent of original size [2021-03-10 21:52:31,050 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:52:31,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:52:31,051 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:15 [2021-03-10 21:52:31,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:31,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:31,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:52:31,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085953564] [2021-03-10 21:52:31,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:52:31,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:31,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:52:31,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:52:31,101 INFO L87 Difference]: Start difference. First operand 1125 states and 3749 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:31,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:31,660 INFO L93 Difference]: Finished difference Result 1343 states and 4368 transitions. [2021-03-10 21:52:31,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:52:31,661 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:31,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:31,663 INFO L225 Difference]: With dead ends: 1343 [2021-03-10 21:52:31,663 INFO L226 Difference]: Without dead ends: 1242 [2021-03-10 21:52:31,663 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 496.4ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:52:31,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-03-10 21:52:31,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1139. [2021-03-10 21:52:31,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 1138 states have (on average 3.3312829525483303) internal successors, (3791), 1138 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:31,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 3791 transitions. [2021-03-10 21:52:31,676 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 3791 transitions. Word has length 24 [2021-03-10 21:52:31,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:31,676 INFO L480 AbstractCegarLoop]: Abstraction has 1139 states and 3791 transitions. [2021-03-10 21:52:31,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:31,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 3791 transitions. [2021-03-10 21:52:31,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:31,677 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:31,677 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:31,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-03-10 21:52:31,878 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:31,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:31,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1222510578, now seen corresponding path program 95 times [2021-03-10 21:52:31,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:31,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303440266] [2021-03-10 21:52:31,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:32,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:32,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303440266] [2021-03-10 21:52:32,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667730341] [2021-03-10 21:52:32,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:32,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:52:32,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:32,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:52:32,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:32,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:52:32,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:32,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:52:32,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:32,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:32,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:52:32,216 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-03-10 21:52:32,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:52:32,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:32,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:52:32,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:32,349 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-03-10 21:52:32,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:52:32,354 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:32,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:32,392 INFO L518 ElimStorePlain]: Eliminatee v_prenex_419 vanished before elimination [2021-03-10 21:52:32,392 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:52:32,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:52:32,393 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:40 [2021-03-10 21:52:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:32,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:32,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:52:32,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362693306] [2021-03-10 21:52:32,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:52:32,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:32,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:52:32,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:52:32,491 INFO L87 Difference]: Start difference. First operand 1139 states and 3791 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:33,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:33,044 INFO L93 Difference]: Finished difference Result 1387 states and 4460 transitions. [2021-03-10 21:52:33,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:52:33,044 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:33,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:33,046 INFO L225 Difference]: With dead ends: 1387 [2021-03-10 21:52:33,046 INFO L226 Difference]: Without dead ends: 1296 [2021-03-10 21:52:33,046 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 562.9ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:52:33,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2021-03-10 21:52:33,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1132. [2021-03-10 21:52:33,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1131 states have (on average 3.3333333333333335) internal successors, (3770), 1131 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:33,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 3770 transitions. [2021-03-10 21:52:33,059 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 3770 transitions. Word has length 24 [2021-03-10 21:52:33,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:33,060 INFO L480 AbstractCegarLoop]: Abstraction has 1132 states and 3770 transitions. [2021-03-10 21:52:33,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:33,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 3770 transitions. [2021-03-10 21:52:33,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:33,061 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:33,061 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:33,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable799,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:33,261 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:33,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:33,262 INFO L82 PathProgramCache]: Analyzing trace with hash -926285958, now seen corresponding path program 96 times [2021-03-10 21:52:33,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:33,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847669647] [2021-03-10 21:52:33,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:33,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847669647] [2021-03-10 21:52:33,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982316928] [2021-03-10 21:52:33,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:33,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:52:33,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:33,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:52:33,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:33,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:52:33,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:33,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:52:33,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:33,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:33,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:52:33,606 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-03-10 21:52:33,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:52:33,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:33,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:52:33,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:33,727 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-03-10 21:52:33,728 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:52:33,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:52:33,731 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:33,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:33,757 INFO L518 ElimStorePlain]: Eliminatee v_prenex_421 vanished before elimination [2021-03-10 21:52:33,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:52:33,758 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:40 [2021-03-10 21:52:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:33,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:33,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:52:33,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870838224] [2021-03-10 21:52:33,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:52:33,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:33,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:52:33,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:52:33,856 INFO L87 Difference]: Start difference. First operand 1132 states and 3770 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:34,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:34,666 INFO L93 Difference]: Finished difference Result 1561 states and 5004 transitions. [2021-03-10 21:52:34,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:52:34,667 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:34,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:34,669 INFO L225 Difference]: With dead ends: 1561 [2021-03-10 21:52:34,669 INFO L226 Difference]: Without dead ends: 1397 [2021-03-10 21:52:34,669 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 770.6ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:52:34,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-03-10 21:52:34,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1132. [2021-03-10 21:52:34,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1131 states have (on average 3.3333333333333335) internal successors, (3770), 1131 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:34,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 3770 transitions. [2021-03-10 21:52:34,682 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 3770 transitions. Word has length 24 [2021-03-10 21:52:34,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:34,682 INFO L480 AbstractCegarLoop]: Abstraction has 1132 states and 3770 transitions. [2021-03-10 21:52:34,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:34,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 3770 transitions. [2021-03-10 21:52:34,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:34,683 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:34,683 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:34,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable804 [2021-03-10 21:52:34,884 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:34,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:34,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1219447524, now seen corresponding path program 97 times [2021-03-10 21:52:34,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:34,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079133615] [2021-03-10 21:52:34,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:35,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079133615] [2021-03-10 21:52:35,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062299882] [2021-03-10 21:52:35,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:35,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:52:35,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:35,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:35,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:35,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:35,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:35,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:35,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:35,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:35,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:35,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:35,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:35,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:35,269 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:35,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:35,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:35,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:35,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:35,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:52:35,335 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:52:35,561 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-03-10 21:52:35,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:35,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:35,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:35,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:35,598 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-03-10 21:52:35,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:35,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:35,602 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:35,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:35,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:52:35,612 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:12 [2021-03-10 21:52:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:35,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:35,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:52:35,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820220917] [2021-03-10 21:52:35,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:52:35,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:35,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:52:35,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:52:35,658 INFO L87 Difference]: Start difference. First operand 1132 states and 3770 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:36,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:36,487 INFO L93 Difference]: Finished difference Result 1452 states and 4651 transitions. [2021-03-10 21:52:36,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:52:36,487 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:36,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:36,490 INFO L225 Difference]: With dead ends: 1452 [2021-03-10 21:52:36,490 INFO L226 Difference]: Without dead ends: 1292 [2021-03-10 21:52:36,490 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 834.1ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:52:36,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2021-03-10 21:52:36,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 1136. [2021-03-10 21:52:36,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.3348017621145374) internal successors, (3785), 1135 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:36,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3785 transitions. [2021-03-10 21:52:36,503 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3785 transitions. Word has length 24 [2021-03-10 21:52:36,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:36,503 INFO L480 AbstractCegarLoop]: Abstraction has 1136 states and 3785 transitions. [2021-03-10 21:52:36,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:36,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3785 transitions. [2021-03-10 21:52:36,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:36,505 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:36,505 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:36,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable809 [2021-03-10 21:52:36,706 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:36,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:36,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1337547956, now seen corresponding path program 98 times [2021-03-10 21:52:36,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:36,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449892930] [2021-03-10 21:52:36,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:36,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449892930] [2021-03-10 21:52:36,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351995065] [2021-03-10 21:52:36,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:52:36,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:52:36,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:36,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:52:36,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:37,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:37,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:37,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:37,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:37,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:37,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:37,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:37,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:37,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:37,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:37,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:37,175 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:37,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:37,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:37,179 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:37,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:37,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:52:37,242 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:52:37,423 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_431], 1=[o_0, v_prenex_430]} [2021-03-10 21:52:37,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:37,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:37,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:37,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:37,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:37,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:37,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:37,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:52:37,483 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:37,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:37,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:37,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:37,511 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:37,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:37,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:52:37,534 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:69, output treesize:27 [2021-03-10 21:52:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:37,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:37,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:52:37,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370145696] [2021-03-10 21:52:37,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:52:37,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:37,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:52:37,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:52:37,601 INFO L87 Difference]: Start difference. First operand 1136 states and 3785 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:38,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:38,316 INFO L93 Difference]: Finished difference Result 1368 states and 4368 transitions. [2021-03-10 21:52:38,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:52:38,317 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:38,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:38,319 INFO L225 Difference]: With dead ends: 1368 [2021-03-10 21:52:38,319 INFO L226 Difference]: Without dead ends: 1297 [2021-03-10 21:52:38,319 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 841.2ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:52:38,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-03-10 21:52:38,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1107. [2021-03-10 21:52:38,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1106 states have (on average 3.321880650994575) internal successors, (3674), 1106 states have internal predecessors, (3674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:38,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 3674 transitions. [2021-03-10 21:52:38,332 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 3674 transitions. Word has length 24 [2021-03-10 21:52:38,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:38,332 INFO L480 AbstractCegarLoop]: Abstraction has 1107 states and 3674 transitions. [2021-03-10 21:52:38,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:38,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 3674 transitions. [2021-03-10 21:52:38,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:38,333 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:38,333 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:38,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable815,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:38,534 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:38,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:38,534 INFO L82 PathProgramCache]: Analyzing trace with hash -476792548, now seen corresponding path program 99 times [2021-03-10 21:52:38,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:38,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959745839] [2021-03-10 21:52:38,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:38,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959745839] [2021-03-10 21:52:38,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062357230] [2021-03-10 21:52:38,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:38,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:52:38,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:38,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:52:38,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:38,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:38,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:38,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:39,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:39,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:39,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:39,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:39,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:39,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:52:39,042 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-03-10 21:52:39,159 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-03-10 21:52:39,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:39,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:39,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:39,167 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:39,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:39,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:39,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:39,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:39,204 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:39,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:39,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:39,210 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:39,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:39,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:52:39,238 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:73, output treesize:31 [2021-03-10 21:52:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:39,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:39,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:52:39,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196579097] [2021-03-10 21:52:39,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:52:39,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:39,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:52:39,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:52:39,347 INFO L87 Difference]: Start difference. First operand 1107 states and 3674 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:40,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:40,412 INFO L93 Difference]: Finished difference Result 1444 states and 4617 transitions. [2021-03-10 21:52:40,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:52:40,412 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:40,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:40,415 INFO L225 Difference]: With dead ends: 1444 [2021-03-10 21:52:40,415 INFO L226 Difference]: Without dead ends: 1386 [2021-03-10 21:52:40,415 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1012.5ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:52:40,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2021-03-10 21:52:40,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1116. [2021-03-10 21:52:40,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 3.327354260089686) internal successors, (3710), 1115 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:40,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 3710 transitions. [2021-03-10 21:52:40,429 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 3710 transitions. Word has length 24 [2021-03-10 21:52:40,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:40,429 INFO L480 AbstractCegarLoop]: Abstraction has 1116 states and 3710 transitions. [2021-03-10 21:52:40,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:40,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 3710 transitions. [2021-03-10 21:52:40,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:40,430 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:40,430 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:40,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable823 [2021-03-10 21:52:40,643 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:40,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:40,643 INFO L82 PathProgramCache]: Analyzing trace with hash -650684718, now seen corresponding path program 100 times [2021-03-10 21:52:40,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:40,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053752192] [2021-03-10 21:52:40,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:40,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053752192] [2021-03-10 21:52:40,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142020527] [2021-03-10 21:52:40,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:40,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:52:40,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:40,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:52:40,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:41,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:41,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:41,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:41,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:41,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:41,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:41,094 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:41,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:41,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:41,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:41,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:41,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:41,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:41,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:41,175 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:41,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:41,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:52:41,239 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:52:41,359 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_439, o_4, v_prenex_441, v_prenex_443], 1=[o_0, v_prenex_438, v_prenex_440, v_prenex_442]} [2021-03-10 21:52:41,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:41,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:41,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:41,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:41,606 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-03-10 21:52:41,607 INFO L628 ElimStorePlain]: treesize reduction 153, result has 54.1 percent of original size [2021-03-10 21:52:41,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:41,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:41,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:41,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:41,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:41,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:52:41,721 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:41,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:41,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:41,815 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:41,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:41,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:41,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:41,906 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:41,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:41,991 INFO L518 ElimStorePlain]: Eliminatee v_prenex_438 vanished before elimination [2021-03-10 21:52:41,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:41,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:52:41,998 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:42,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:42,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:42,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:42,087 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:42,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:42,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:52:42,174 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:345, output treesize:96 [2021-03-10 21:52:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:42,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:42,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:52:42,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667805123] [2021-03-10 21:52:42,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:52:42,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:42,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:52:42,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:52:42,364 INFO L87 Difference]: Start difference. First operand 1116 states and 3710 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:43,042 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-10 21:52:43,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:43,618 INFO L93 Difference]: Finished difference Result 1606 states and 5083 transitions. [2021-03-10 21:52:43,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:52:43,619 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:43,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:43,621 INFO L225 Difference]: With dead ends: 1606 [2021-03-10 21:52:43,622 INFO L226 Difference]: Without dead ends: 1526 [2021-03-10 21:52:43,622 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1360.9ms TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:52:43,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-03-10 21:52:43,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1119. [2021-03-10 21:52:43,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.32737030411449) internal successors, (3720), 1118 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) [2021-03-10 21:52:43,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3720 transitions. [2021-03-10 21:52:43,636 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3720 transitions. Word has length 24 [2021-03-10 21:52:43,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:43,636 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3720 transitions. [2021-03-10 21:52:43,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:43,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3720 transitions. [2021-03-10 21:52:43,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:43,638 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:43,638 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:43,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable831,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:43,838 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:43,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:43,838 INFO L82 PathProgramCache]: Analyzing trace with hash 948905746, now seen corresponding path program 101 times [2021-03-10 21:52:43,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:43,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388038027] [2021-03-10 21:52:43,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:44,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388038027] [2021-03-10 21:52:44,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680437946] [2021-03-10 21:52:44,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:44,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:52:44,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:44,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:52:44,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:44,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:44,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:44,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:44,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:44,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:44,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:44,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:44,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:44,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:44,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:44,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:44,379 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:44,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:44,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:44,383 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:44,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:44,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:52:44,446 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:52:44,564 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_449, o_4, v_prenex_451, v_prenex_453], 1=[v_prenex_448, o_0, v_prenex_450, v_prenex_452]} [2021-03-10 21:52:44,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:44,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:44,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:44,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:44,804 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-03-10 21:52:44,805 INFO L628 ElimStorePlain]: treesize reduction 159, result has 52.3 percent of original size [2021-03-10 21:52:44,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:44,810 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:44,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:44,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:52:44,906 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:44,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:44,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:44,999 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:45,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:45,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:45,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:52:45,092 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:45,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:45,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:45,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:45,183 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:45,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:45,264 INFO L518 ElimStorePlain]: Eliminatee v_prenex_450 vanished before elimination [2021-03-10 21:52:45,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:45,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:45,269 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:45,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:45,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:52:45,358 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:345, output treesize:96 [2021-03-10 21:52:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:45,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:45,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:52:45,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861215434] [2021-03-10 21:52:45,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:52:45,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:45,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:52:45,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:52:45,540 INFO L87 Difference]: Start difference. First operand 1119 states and 3720 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:46,641 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-03-10 21:52:46,834 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-03-10 21:52:46,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:46,912 INFO L93 Difference]: Finished difference Result 1766 states and 5528 transitions. [2021-03-10 21:52:46,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:52:46,912 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:46,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:46,915 INFO L225 Difference]: With dead ends: 1766 [2021-03-10 21:52:46,915 INFO L226 Difference]: Without dead ends: 1648 [2021-03-10 21:52:46,915 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1436.2ms TimeCoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:52:46,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2021-03-10 21:52:46,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1138. [2021-03-10 21:52:46,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 3.350923482849604) internal successors, (3810), 1137 states have internal predecessors, (3810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:46,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 3810 transitions. [2021-03-10 21:52:46,930 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 3810 transitions. Word has length 24 [2021-03-10 21:52:46,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:46,930 INFO L480 AbstractCegarLoop]: Abstraction has 1138 states and 3810 transitions. [2021-03-10 21:52:46,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:46,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 3810 transitions. [2021-03-10 21:52:46,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:46,939 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:46,939 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:47,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable839,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:47,140 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:47,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:47,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1628306326, now seen corresponding path program 102 times [2021-03-10 21:52:47,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:47,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883249360] [2021-03-10 21:52:47,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:47,311 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:47,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883249360] [2021-03-10 21:52:47,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610923858] [2021-03-10 21:52:47,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:47,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:52:47,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:47,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:52:47,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:47,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:47,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:47,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:47,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:47,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:47,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:47,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:47,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:47,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:52:47,539 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-03-10 21:52:47,657 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_457], 1=[o_0, v_prenex_456]} [2021-03-10 21:52:47,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:47,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:47,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:47,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:47,748 INFO L628 ElimStorePlain]: treesize reduction 92, result has 39.9 percent of original size [2021-03-10 21:52:47,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:47,752 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:47,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:47,783 INFO L518 ElimStorePlain]: Eliminatee o_0 vanished before elimination [2021-03-10 21:52:47,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:47,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:47,788 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:47,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:47,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:52:47,818 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:165, output treesize:34 [2021-03-10 21:52:47,902 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:47,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:47,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:52:47,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934657631] [2021-03-10 21:52:47,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:52:47,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:47,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:52:47,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:52:47,903 INFO L87 Difference]: Start difference. First operand 1138 states and 3810 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:48,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:48,436 INFO L93 Difference]: Finished difference Result 1443 states and 4705 transitions. [2021-03-10 21:52:48,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:52:48,436 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:48,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:48,438 INFO L225 Difference]: With dead ends: 1443 [2021-03-10 21:52:48,438 INFO L226 Difference]: Without dead ends: 1354 [2021-03-10 21:52:48,438 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 602.8ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:52:48,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-03-10 21:52:48,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1149. [2021-03-10 21:52:48,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 3.35191637630662) internal successors, (3848), 1148 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:48,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 3848 transitions. [2021-03-10 21:52:48,451 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 3848 transitions. Word has length 24 [2021-03-10 21:52:48,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:48,451 INFO L480 AbstractCegarLoop]: Abstraction has 1149 states and 3848 transitions. [2021-03-10 21:52:48,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:48,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 3848 transitions. [2021-03-10 21:52:48,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:48,452 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:48,452 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:48,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable847,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:48,653 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:48,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:48,653 INFO L82 PathProgramCache]: Analyzing trace with hash -147330124, now seen corresponding path program 103 times [2021-03-10 21:52:48,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:48,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033378232] [2021-03-10 21:52:48,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:48,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033378232] [2021-03-10 21:52:48,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016242690] [2021-03-10 21:52:48,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:48,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:52:48,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:49,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:49,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:49,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:49,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:49,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:49,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:49,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:49,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:49,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:52:49,164 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-03-10 21:52:49,232 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_461], 1=[o_2, v_prenex_460]} [2021-03-10 21:52:49,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:49,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:49,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:49,241 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:49,326 INFO L628 ElimStorePlain]: treesize reduction 83, result has 45.8 percent of original size [2021-03-10 21:52:49,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:49,330 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:49,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:49,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:49,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:49,367 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:49,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:49,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:49,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:49,407 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:49,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:49,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:52:49,438 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:34 [2021-03-10 21:52:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:49,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:49,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:52:49,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893699817] [2021-03-10 21:52:49,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:52:49,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:49,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:52:49,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:52:49,529 INFO L87 Difference]: Start difference. First operand 1149 states and 3848 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:50,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:50,150 INFO L93 Difference]: Finished difference Result 1493 states and 4861 transitions. [2021-03-10 21:52:50,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:52:50,159 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:50,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:50,161 INFO L225 Difference]: With dead ends: 1493 [2021-03-10 21:52:50,161 INFO L226 Difference]: Without dead ends: 1360 [2021-03-10 21:52:50,161 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 756.7ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:52:50,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2021-03-10 21:52:50,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 1149. [2021-03-10 21:52:50,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 3.35191637630662) internal successors, (3848), 1148 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:50,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 3848 transitions. [2021-03-10 21:52:50,174 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 3848 transitions. Word has length 24 [2021-03-10 21:52:50,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:50,174 INFO L480 AbstractCegarLoop]: Abstraction has 1149 states and 3848 transitions. [2021-03-10 21:52:50,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:50,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 3848 transitions. [2021-03-10 21:52:50,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:50,176 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:50,176 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:50,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable853 [2021-03-10 21:52:50,376 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:50,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:50,376 INFO L82 PathProgramCache]: Analyzing trace with hash 483874378, now seen corresponding path program 104 times [2021-03-10 21:52:50,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:50,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960321687] [2021-03-10 21:52:50,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:50,657 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:50,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960321687] [2021-03-10 21:52:50,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487534435] [2021-03-10 21:52:50,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:50,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:52:50,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:50,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:52:50,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:50,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:50,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:50,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:50,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:50,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:50,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:50,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:50,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:50,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:52:50,892 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-03-10 21:52:50,957 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_465], 1=[o_2, v_prenex_464]} [2021-03-10 21:52:50,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:50,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:50,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:50,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:51,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:51,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:51,039 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:51,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:51,043 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:51,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:51,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:51,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:51,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:51,112 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:51,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:51,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:51,117 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:51,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:51,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:51,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:51,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:52:51,186 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:51,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:51,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:52:51,191 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:51,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:51,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:52:51,249 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:153, output treesize:69 [2021-03-10 21:52:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:51,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:51,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:52:51,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356531650] [2021-03-10 21:52:51,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:52:51,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:51,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:52:51,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:52:51,405 INFO L87 Difference]: Start difference. First operand 1149 states and 3848 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:51,760 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-03-10 21:52:51,998 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 21:52:52,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:52,806 INFO L93 Difference]: Finished difference Result 1545 states and 4941 transitions. [2021-03-10 21:52:52,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:52:52,806 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:52,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:52,809 INFO L225 Difference]: With dead ends: 1545 [2021-03-10 21:52:52,809 INFO L226 Difference]: Without dead ends: 1455 [2021-03-10 21:52:52,809 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1403.3ms TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:52:52,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-03-10 21:52:52,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1125. [2021-03-10 21:52:52,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 3.3469750889679717) internal successors, (3762), 1124 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:52,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 3762 transitions. [2021-03-10 21:52:52,824 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 3762 transitions. Word has length 24 [2021-03-10 21:52:52,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:52,824 INFO L480 AbstractCegarLoop]: Abstraction has 1125 states and 3762 transitions. [2021-03-10 21:52:52,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:52,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 3762 transitions. [2021-03-10 21:52:52,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:52,825 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:52,825 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:53,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable859 [2021-03-10 21:52:53,041 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:53,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:53,041 INFO L82 PathProgramCache]: Analyzing trace with hash 2083464842, now seen corresponding path program 105 times [2021-03-10 21:52:53,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:53,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618233996] [2021-03-10 21:52:53,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:53,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:53,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618233996] [2021-03-10 21:52:53,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858881574] [2021-03-10 21:52:53,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:53,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:52:53,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:53,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:52:53,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:53,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:53,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:53,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:53,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:53,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:53,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:52:53,324 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-03-10 21:52:53,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:53,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:53,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:53,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:53,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:53,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:52:53,425 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:53,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:52:53,429 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:53,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:53,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:53,480 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:53,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:53,483 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:53,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:53,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:53,538 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:53,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:53,542 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:53,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:53,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:52:53,582 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:129, output treesize:69 [2021-03-10 21:52:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:53,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:53,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:52:53,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125268755] [2021-03-10 21:52:53,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:52:53,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:53,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:52:53,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:52:53,746 INFO L87 Difference]: Start difference. First operand 1125 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:54,159 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-10 21:52:54,355 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-10 21:52:54,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:54,711 INFO L93 Difference]: Finished difference Result 1505 states and 4758 transitions. [2021-03-10 21:52:54,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:52:54,712 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:54,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:54,714 INFO L225 Difference]: With dead ends: 1505 [2021-03-10 21:52:54,714 INFO L226 Difference]: Without dead ends: 1407 [2021-03-10 21:52:54,714 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 942.0ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:52:54,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-03-10 21:52:54,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1099. [2021-03-10 21:52:54,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 1098 states have (on average 3.3469945355191255) internal successors, (3675), 1098 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:54,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 3675 transitions. [2021-03-10 21:52:54,727 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 3675 transitions. Word has length 24 [2021-03-10 21:52:54,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:54,727 INFO L480 AbstractCegarLoop]: Abstraction has 1099 states and 3675 transitions. [2021-03-10 21:52:54,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:54,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 3675 transitions. [2021-03-10 21:52:54,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:54,729 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:54,729 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:54,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable867,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:54,929 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:54,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:54,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1258078748, now seen corresponding path program 106 times [2021-03-10 21:52:54,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:54,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826532742] [2021-03-10 21:52:54,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:55,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826532742] [2021-03-10 21:52:55,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989722363] [2021-03-10 21:52:55,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:52:55,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:52:55,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:55,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:52:55,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:55,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:55,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:55,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:55,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:55,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:55,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:55,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:55,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:55,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:55,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:55,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:55,431 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:55,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:55,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:55,435 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:55,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:55,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:52:55,500 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:52:55,658 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_473], 1=[o_2, v_prenex_472]} [2021-03-10 21:52:55,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:55,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:55,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:55,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:55,754 INFO L628 ElimStorePlain]: treesize reduction 83, result has 45.8 percent of original size [2021-03-10 21:52:55,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:55,758 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:55,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:55,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:55,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:55,795 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:55,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:55,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:55,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:55,834 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:55,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:55,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:52:55,865 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:34 [2021-03-10 21:52:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:55,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:55,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:52:55,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059740514] [2021-03-10 21:52:55,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:52:55,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:55,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:52:55,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:52:55,970 INFO L87 Difference]: Start difference. First operand 1099 states and 3675 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:56,347 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-03-10 21:52:57,206 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-03-10 21:52:57,355 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-03-10 21:52:57,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:57,468 INFO L93 Difference]: Finished difference Result 1816 states and 5733 transitions. [2021-03-10 21:52:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:52:57,468 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:57,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:57,471 INFO L225 Difference]: With dead ends: 1816 [2021-03-10 21:52:57,471 INFO L226 Difference]: Without dead ends: 1595 [2021-03-10 21:52:57,471 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1454.0ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:52:57,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2021-03-10 21:52:57,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1106. [2021-03-10 21:52:57,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 1105 states have (on average 3.3574660633484164) internal successors, (3710), 1105 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:57,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 3710 transitions. [2021-03-10 21:52:57,486 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 3710 transitions. Word has length 24 [2021-03-10 21:52:57,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:57,486 INFO L480 AbstractCegarLoop]: Abstraction has 1106 states and 3710 transitions. [2021-03-10 21:52:57,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:57,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 3710 transitions. [2021-03-10 21:52:57,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:57,488 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:57,488 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:57,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable875,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:57,688 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:57,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:57,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1235205324, now seen corresponding path program 107 times [2021-03-10 21:52:57,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:57,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920525701] [2021-03-10 21:52:57,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:57,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920525701] [2021-03-10 21:52:57,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047423519] [2021-03-10 21:52:57,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:57,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:52:57,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:57,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:52:57,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:57,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:52:57,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:57,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:52:57,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:57,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:57,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:52:57,982 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-03-10 21:52:58,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:52:58,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:58,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:52:58,094 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:58,118 INFO L628 ElimStorePlain]: treesize reduction 24, result has 38.5 percent of original size [2021-03-10 21:52:58,118 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:52:58,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:52:58,119 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:15 [2021-03-10 21:52:58,175 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:58,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:58,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:52:58,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168373974] [2021-03-10 21:52:58,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:52:58,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:58,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:52:58,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:52:58,176 INFO L87 Difference]: Start difference. First operand 1106 states and 3710 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:58,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:58,611 INFO L93 Difference]: Finished difference Result 1553 states and 5030 transitions. [2021-03-10 21:52:58,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:52:58,611 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:58,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:58,614 INFO L225 Difference]: With dead ends: 1553 [2021-03-10 21:52:58,614 INFO L226 Difference]: Without dead ends: 1470 [2021-03-10 21:52:58,614 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 480.2ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:52:58,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-03-10 21:52:58,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1107. [2021-03-10 21:52:58,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1106 states have (on average 3.3625678119349005) internal successors, (3719), 1106 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:58,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 3719 transitions. [2021-03-10 21:52:58,628 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 3719 transitions. Word has length 24 [2021-03-10 21:52:58,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:58,628 INFO L480 AbstractCegarLoop]: Abstraction has 1107 states and 3719 transitions. [2021-03-10 21:52:58,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:58,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 3719 transitions. [2021-03-10 21:52:58,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:58,629 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:58,629 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:58,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2021-03-10 21:52:58,830 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:58,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:58,830 INFO L82 PathProgramCache]: Analyzing trace with hash -85381394, now seen corresponding path program 108 times [2021-03-10 21:52:58,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:58,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337745074] [2021-03-10 21:52:58,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:58,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337745074] [2021-03-10 21:52:58,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364253282] [2021-03-10 21:52:58,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:59,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:52:59,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:59,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:52:59,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:59,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:52:59,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:59,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:52:59,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:59,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:59,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:52:59,114 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-03-10 21:52:59,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:52:59,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:59,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:52:59,216 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:59,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:52:59,220 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:59,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:52:59,223 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:59,282 INFO L628 ElimStorePlain]: treesize reduction 53, result has 43.0 percent of original size [2021-03-10 21:52:59,282 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:52:59,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:52:59,283 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:177, output treesize:40 [2021-03-10 21:52:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:52:59,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:59,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:52:59,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223020768] [2021-03-10 21:52:59,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:52:59,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:59,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:52:59,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:52:59,378 INFO L87 Difference]: Start difference. First operand 1107 states and 3719 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:59,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:59,912 INFO L93 Difference]: Finished difference Result 1573 states and 5069 transitions. [2021-03-10 21:52:59,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:52:59,912 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:52:59,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:59,915 INFO L225 Difference]: With dead ends: 1573 [2021-03-10 21:52:59,915 INFO L226 Difference]: Without dead ends: 1484 [2021-03-10 21:52:59,915 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 539.9ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:52:59,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2021-03-10 21:52:59,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1100. [2021-03-10 21:52:59,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1099 states have (on average 3.35213830755232) internal successors, (3684), 1099 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:59,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 3684 transitions. [2021-03-10 21:52:59,929 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 3684 transitions. Word has length 24 [2021-03-10 21:52:59,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:59,929 INFO L480 AbstractCegarLoop]: Abstraction has 1100 states and 3684 transitions. [2021-03-10 21:52:59,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:59,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 3684 transitions. [2021-03-10 21:52:59,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:52:59,931 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:59,931 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:00,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable887,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:00,131 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:00,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:00,131 INFO L82 PathProgramCache]: Analyzing trace with hash 59669154, now seen corresponding path program 109 times [2021-03-10 21:53:00,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:00,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659073546] [2021-03-10 21:53:00,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:00,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:00,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659073546] [2021-03-10 21:53:00,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529384884] [2021-03-10 21:53:00,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:00,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:53:00,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:00,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:53:00,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:00,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:53:00,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:00,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:00,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:00,512 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-03-10 21:53:00,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:00,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:00,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:00,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:00,657 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-03-10 21:53:00,657 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:53:00,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:00,660 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:00,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:00,687 INFO L518 ElimStorePlain]: Eliminatee v_prenex_475 vanished before elimination [2021-03-10 21:53:00,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:00,688 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:40 [2021-03-10 21:53:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:00,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:00,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:53:00,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018638452] [2021-03-10 21:53:00,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:53:00,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:00,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:53:00,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:53:00,793 INFO L87 Difference]: Start difference. First operand 1100 states and 3684 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:01,560 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-10 21:53:01,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:01,599 INFO L93 Difference]: Finished difference Result 1506 states and 4821 transitions. [2021-03-10 21:53:01,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:53:01,599 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:01,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:01,601 INFO L225 Difference]: With dead ends: 1506 [2021-03-10 21:53:01,601 INFO L226 Difference]: Without dead ends: 1386 [2021-03-10 21:53:01,601 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 824.9ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:53:01,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2021-03-10 21:53:01,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1103. [2021-03-10 21:53:01,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1102 states have (on average 3.3157894736842106) internal successors, (3654), 1102 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:01,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 3654 transitions. [2021-03-10 21:53:01,615 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 3654 transitions. Word has length 24 [2021-03-10 21:53:01,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:01,615 INFO L480 AbstractCegarLoop]: Abstraction has 1103 states and 3654 transitions. [2021-03-10 21:53:01,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:01,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 3654 transitions. [2021-03-10 21:53:01,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:01,616 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:01,616 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:01,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable892 [2021-03-10 21:53:01,817 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:01,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:01,817 INFO L82 PathProgramCache]: Analyzing trace with hash -214353972, now seen corresponding path program 110 times [2021-03-10 21:53:01,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:01,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422606012] [2021-03-10 21:53:01,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:02,049 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:02,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422606012] [2021-03-10 21:53:02,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088989178] [2021-03-10 21:53:02,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:53:02,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:53:02,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:02,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:53:02,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:02,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:53:02,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:02,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:53:02,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:02,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:02,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:02,200 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-03-10 21:53:02,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:02,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:02,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:02,277 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:53:02,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:02,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:02,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:02,303 INFO L518 ElimStorePlain]: Eliminatee v_prenex_477 vanished before elimination [2021-03-10 21:53:02,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:02,304 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-03-10 21:53:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:02,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:02,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:53:02,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613045665] [2021-03-10 21:53:02,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:53:02,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:02,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:53:02,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:53:02,434 INFO L87 Difference]: Start difference. First operand 1103 states and 3654 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:02,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:02,883 INFO L93 Difference]: Finished difference Result 1353 states and 4367 transitions. [2021-03-10 21:53:02,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:53:02,883 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:02,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:02,885 INFO L225 Difference]: With dead ends: 1353 [2021-03-10 21:53:02,885 INFO L226 Difference]: Without dead ends: 1235 [2021-03-10 21:53:02,885 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 541.0ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:53:02,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2021-03-10 21:53:02,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1008. [2021-03-10 21:53:02,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1007 states have (on average 3.3177755710029793) internal successors, (3341), 1007 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:02,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 3341 transitions. [2021-03-10 21:53:02,897 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 3341 transitions. Word has length 24 [2021-03-10 21:53:02,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:02,897 INFO L480 AbstractCegarLoop]: Abstraction has 1008 states and 3341 transitions. [2021-03-10 21:53:02,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:02,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 3341 transitions. [2021-03-10 21:53:02,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:02,899 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:02,899 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:03,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable898,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:03,099 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:03,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:03,099 INFO L82 PathProgramCache]: Analyzing trace with hash -699816630, now seen corresponding path program 111 times [2021-03-10 21:53:03,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:03,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701156509] [2021-03-10 21:53:03,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:03,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701156509] [2021-03-10 21:53:03,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532624030] [2021-03-10 21:53:03,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:53:03,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:53:03,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:03,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:53:03,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:03,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:53:03,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:03,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:53:03,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:03,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:03,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:03,400 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-03-10 21:53:03,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:03,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:03,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:03,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:03,507 INFO L628 ElimStorePlain]: treesize reduction 24, result has 38.5 percent of original size [2021-03-10 21:53:03,507 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:53:03,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:53:03,507 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:15 [2021-03-10 21:53:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:03,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:03,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:53:03,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442968501] [2021-03-10 21:53:03,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:53:03,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:03,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:53:03,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:53:03,572 INFO L87 Difference]: Start difference. First operand 1008 states and 3341 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:03,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:03,956 INFO L93 Difference]: Finished difference Result 1175 states and 3794 transitions. [2021-03-10 21:53:03,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:53:03,957 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:03,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:03,959 INFO L225 Difference]: With dead ends: 1175 [2021-03-10 21:53:03,959 INFO L226 Difference]: Without dead ends: 1116 [2021-03-10 21:53:03,959 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 426.0ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:53:03,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-03-10 21:53:03,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1035. [2021-03-10 21:53:03,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 1034 states have (on average 3.3094777562862667) internal successors, (3422), 1034 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:03,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 3422 transitions. [2021-03-10 21:53:03,970 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 3422 transitions. Word has length 24 [2021-03-10 21:53:03,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:03,970 INFO L480 AbstractCegarLoop]: Abstraction has 1035 states and 3422 transitions. [2021-03-10 21:53:03,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:03,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 3422 transitions. [2021-03-10 21:53:03,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:03,971 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:03,971 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:04,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable907 [2021-03-10 21:53:04,173 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:04,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:04,173 INFO L82 PathProgramCache]: Analyzing trace with hash -965234452, now seen corresponding path program 112 times [2021-03-10 21:53:04,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:04,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654066940] [2021-03-10 21:53:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:04,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654066940] [2021-03-10 21:53:04,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042081518] [2021-03-10 21:53:04,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:04,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:53:04,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:04,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:53:04,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:04,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:53:04,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:04,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:53:04,458 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:04,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:04,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:04,483 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-03-10 21:53:04,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:04,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:04,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:04,554 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:04,624 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-03-10 21:53:04,624 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:53:04,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:04,628 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:04,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:04,655 INFO L518 ElimStorePlain]: Eliminatee v_prenex_479 vanished before elimination [2021-03-10 21:53:04,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:04,655 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:40 [2021-03-10 21:53:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:04,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:04,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:53:04,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94625326] [2021-03-10 21:53:04,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:53:04,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:04,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:53:04,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:53:04,758 INFO L87 Difference]: Start difference. First operand 1035 states and 3422 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:05,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:05,279 INFO L93 Difference]: Finished difference Result 1283 states and 4082 transitions. [2021-03-10 21:53:05,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:53:05,279 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:05,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:05,281 INFO L225 Difference]: With dead ends: 1283 [2021-03-10 21:53:05,281 INFO L226 Difference]: Without dead ends: 1192 [2021-03-10 21:53:05,281 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 588.3ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:05,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2021-03-10 21:53:05,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1028. [2021-03-10 21:53:05,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 3.311587147030185) internal successors, (3401), 1027 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:05,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 3401 transitions. [2021-03-10 21:53:05,293 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 3401 transitions. Word has length 24 [2021-03-10 21:53:05,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:05,293 INFO L480 AbstractCegarLoop]: Abstraction has 1028 states and 3401 transitions. [2021-03-10 21:53:05,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:05,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 3401 transitions. [2021-03-10 21:53:05,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:05,294 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:05,294 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:05,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable911,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:05,503 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:05,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:05,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1180936308, now seen corresponding path program 113 times [2021-03-10 21:53:05,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:05,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627941641] [2021-03-10 21:53:05,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:05,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:05,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627941641] [2021-03-10 21:53:05,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108026663] [2021-03-10 21:53:05,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:05,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:53:05,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:05,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:53:05,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:05,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:53:05,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:05,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:53:05,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:05,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:05,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:05,899 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-03-10 21:53:05,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:05,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:05,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:05,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:06,033 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-03-10 21:53:06,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:06,037 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:06,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:06,066 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:53:06,066 INFO L518 ElimStorePlain]: Eliminatee v_prenex_481 vanished before elimination [2021-03-10 21:53:06,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:06,066 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:40 [2021-03-10 21:53:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:06,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:06,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:53:06,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416460815] [2021-03-10 21:53:06,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:53:06,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:06,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:53:06,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:53:06,165 INFO L87 Difference]: Start difference. First operand 1028 states and 3401 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:06,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:06,830 INFO L93 Difference]: Finished difference Result 1441 states and 4539 transitions. [2021-03-10 21:53:06,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:53:06,830 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:06,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:06,833 INFO L225 Difference]: With dead ends: 1441 [2021-03-10 21:53:06,833 INFO L226 Difference]: Without dead ends: 1319 [2021-03-10 21:53:06,833 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 704.7ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:53:06,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2021-03-10 21:53:06,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1028. [2021-03-10 21:53:06,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 3.311587147030185) internal successors, (3401), 1027 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:06,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 3401 transitions. [2021-03-10 21:53:06,846 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 3401 transitions. Word has length 24 [2021-03-10 21:53:06,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:06,846 INFO L480 AbstractCegarLoop]: Abstraction has 1028 states and 3401 transitions. [2021-03-10 21:53:06,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:06,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 3401 transitions. [2021-03-10 21:53:06,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:06,847 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:06,847 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:07,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable916,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:07,048 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:07,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:07,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1687282574, now seen corresponding path program 114 times [2021-03-10 21:53:07,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:07,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611522047] [2021-03-10 21:53:07,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:07,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:07,324 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:07,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611522047] [2021-03-10 21:53:07,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344555944] [2021-03-10 21:53:07,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:07,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:53:07,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:07,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:53:07,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:07,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:53:07,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:07,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:53:07,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:07,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:07,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:07,436 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-03-10 21:53:07,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:07,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:07,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:07,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:07,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:07,531 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:07,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:07,534 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:07,595 INFO L628 ElimStorePlain]: treesize reduction 53, result has 43.0 percent of original size [2021-03-10 21:53:07,596 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:53:07,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:07,597 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:177, output treesize:40 [2021-03-10 21:53:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:07,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:07,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:53:07,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028011775] [2021-03-10 21:53:07,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:53:07,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:07,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:53:07,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:53:07,704 INFO L87 Difference]: Start difference. First operand 1028 states and 3401 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:08,126 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-10 21:53:08,874 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-10 21:53:08,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:08,875 INFO L93 Difference]: Finished difference Result 1636 states and 5258 transitions. [2021-03-10 21:53:08,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:53:08,875 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:08,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:08,877 INFO L225 Difference]: With dead ends: 1636 [2021-03-10 21:53:08,877 INFO L226 Difference]: Without dead ends: 1545 [2021-03-10 21:53:08,877 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1190.5ms TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:53:08,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2021-03-10 21:53:08,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1068. [2021-03-10 21:53:08,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 3.2989690721649483) internal successors, (3520), 1067 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:08,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 3520 transitions. [2021-03-10 21:53:08,890 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 3520 transitions. Word has length 24 [2021-03-10 21:53:08,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:08,890 INFO L480 AbstractCegarLoop]: Abstraction has 1068 states and 3520 transitions. [2021-03-10 21:53:08,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:08,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 3520 transitions. [2021-03-10 21:53:08,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:08,891 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:08,891 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:09,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable921,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:09,091 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:09,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:09,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1829849452, now seen corresponding path program 115 times [2021-03-10 21:53:09,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:09,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528729012] [2021-03-10 21:53:09,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:09,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528729012] [2021-03-10 21:53:09,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981247362] [2021-03-10 21:53:09,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:09,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:53:09,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:09,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:09,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:09,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:09,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:09,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:09,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:09,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:09,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:09,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:09,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:09,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:09,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:09,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:09,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:09,533 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:09,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:09,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:53:09,598 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:53:09,827 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-03-10 21:53:09,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:09,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:09,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:09,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:09,864 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-03-10 21:53:09,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:09,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:09,868 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:09,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:09,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:53:09,879 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:12 [2021-03-10 21:53:09,928 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:09,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:09,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:53:09,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239967640] [2021-03-10 21:53:09,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:53:09,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:09,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:53:09,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:53:09,929 INFO L87 Difference]: Start difference. First operand 1068 states and 3520 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:10,251 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-03-10 21:53:10,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:10,949 INFO L93 Difference]: Finished difference Result 1294 states and 4112 transitions. [2021-03-10 21:53:10,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:53:10,949 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:10,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:10,951 INFO L225 Difference]: With dead ends: 1294 [2021-03-10 21:53:10,952 INFO L226 Difference]: Without dead ends: 1208 [2021-03-10 21:53:10,952 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1104.5ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:53:10,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-03-10 21:53:10,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1096. [2021-03-10 21:53:10,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 3.297716894977169) internal successors, (3611), 1095 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:10,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3611 transitions. [2021-03-10 21:53:10,964 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3611 transitions. Word has length 24 [2021-03-10 21:53:10,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:10,964 INFO L480 AbstractCegarLoop]: Abstraction has 1096 states and 3611 transitions. [2021-03-10 21:53:10,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:10,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3611 transitions. [2021-03-10 21:53:10,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:10,966 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:10,966 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:11,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable925 [2021-03-10 21:53:11,166 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:11,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:11,166 INFO L82 PathProgramCache]: Analyzing trace with hash 727146028, now seen corresponding path program 116 times [2021-03-10 21:53:11,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:11,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743676930] [2021-03-10 21:53:11,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:11,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743676930] [2021-03-10 21:53:11,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988335498] [2021-03-10 21:53:11,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:11,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:53:11,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:11,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:53:11,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:11,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:11,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:11,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:11,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:11,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:11,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:11,612 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:11,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:11,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:11,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:11,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:11,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:11,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:11,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:11,697 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:11,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:11,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:53:11,770 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:53:11,965 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_491, o_4], 1=[o_0, v_prenex_490]} [2021-03-10 21:53:11,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:11,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:11,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:11,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:53:12,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:12,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:12,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:12,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:53:12,030 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:12,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:12,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:12,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:12,069 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:12,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:12,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:12,093 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:69, output treesize:27 [2021-03-10 21:53:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:12,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:12,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:53:12,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517224051] [2021-03-10 21:53:12,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:53:12,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:12,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:53:12,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:53:12,163 INFO L87 Difference]: Start difference. First operand 1096 states and 3611 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:12,520 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-03-10 21:53:12,763 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-03-10 21:53:13,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:13,103 INFO L93 Difference]: Finished difference Result 1316 states and 4176 transitions. [2021-03-10 21:53:13,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:53:13,104 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:13,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:13,106 INFO L225 Difference]: With dead ends: 1316 [2021-03-10 21:53:13,106 INFO L226 Difference]: Without dead ends: 1269 [2021-03-10 21:53:13,106 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1005.2ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:53:13,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-03-10 21:53:13,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1094. [2021-03-10 21:53:13,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.301006404391583) internal successors, (3608), 1093 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:13,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3608 transitions. [2021-03-10 21:53:13,119 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3608 transitions. Word has length 24 [2021-03-10 21:53:13,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:13,119 INFO L480 AbstractCegarLoop]: Abstraction has 1094 states and 3608 transitions. [2021-03-10 21:53:13,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:13,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3608 transitions. [2021-03-10 21:53:13,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:13,121 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:13,121 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:13,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable931,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:13,321 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:13,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:13,321 INFO L82 PathProgramCache]: Analyzing trace with hash 946442004, now seen corresponding path program 117 times [2021-03-10 21:53:13,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:13,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70916919] [2021-03-10 21:53:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:53:13,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70916919] [2021-03-10 21:53:13,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380028167] [2021-03-10 21:53:13,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:13,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:53:13,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:13,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:53:13,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:13,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:13,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:13,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:13,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:13,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:13,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:13,719 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:13,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:13,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:53:13,745 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-03-10 21:53:13,897 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-03-10 21:53:13,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:13,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:13,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:13,904 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:13,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:13,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:13,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:13,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:13,934 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:13,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:13,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:13,939 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:13,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:13,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:13,963 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:25 [2021-03-10 21:53:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:53:14,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:14,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:53:14,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232821991] [2021-03-10 21:53:14,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:53:14,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:14,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:53:14,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:53:14,025 INFO L87 Difference]: Start difference. First operand 1094 states and 3608 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:14,398 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-03-10 21:53:15,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:15,248 INFO L93 Difference]: Finished difference Result 1324 states and 4235 transitions. [2021-03-10 21:53:15,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:53:15,249 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:15,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:15,251 INFO L225 Difference]: With dead ends: 1324 [2021-03-10 21:53:15,251 INFO L226 Difference]: Without dead ends: 1239 [2021-03-10 21:53:15,251 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1039.1ms TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:53:15,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-03-10 21:53:15,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1101. [2021-03-10 21:53:15,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.2990909090909093) internal successors, (3629), 1100 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:15,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3629 transitions. [2021-03-10 21:53:15,263 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3629 transitions. Word has length 24 [2021-03-10 21:53:15,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:15,263 INFO L480 AbstractCegarLoop]: Abstraction has 1101 states and 3629 transitions. [2021-03-10 21:53:15,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:15,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3629 transitions. [2021-03-10 21:53:15,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:15,264 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:15,264 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:15,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable939,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:15,465 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:15,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:15,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1087194476, now seen corresponding path program 118 times [2021-03-10 21:53:15,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:15,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861470555] [2021-03-10 21:53:15,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:15,649 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:15,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861470555] [2021-03-10 21:53:15,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803843015] [2021-03-10 21:53:15,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:15,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:53:15,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:15,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:53:15,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:15,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:15,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:15,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:15,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:15,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:15,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:15,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:15,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:15,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:15,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:15,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:15,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:15,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:15,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:15,939 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:16,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:16,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:53:16,006 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:53:16,224 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_499], 1=[o_0, v_prenex_498]} [2021-03-10 21:53:16,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:16,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:16,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:16,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:16,323 INFO L628 ElimStorePlain]: treesize reduction 83, result has 45.8 percent of original size [2021-03-10 21:53:16,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:16,327 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:16,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:16,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:16,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:16,366 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:16,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:16,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:16,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:16,407 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:16,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:16,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:16,439 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:34 [2021-03-10 21:53:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:16,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:16,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:53:16,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186204711] [2021-03-10 21:53:16,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:53:16,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:16,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:53:16,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:53:16,531 INFO L87 Difference]: Start difference. First operand 1101 states and 3629 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:16,881 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-03-10 21:53:17,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:17,527 INFO L93 Difference]: Finished difference Result 1387 states and 4388 transitions. [2021-03-10 21:53:17,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:53:17,527 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:17,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:17,529 INFO L225 Difference]: With dead ends: 1387 [2021-03-10 21:53:17,529 INFO L226 Difference]: Without dead ends: 1273 [2021-03-10 21:53:17,530 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1039.6ms TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:53:17,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-03-10 21:53:17,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1094. [2021-03-10 21:53:17,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.301006404391583) internal successors, (3608), 1093 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:17,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3608 transitions. [2021-03-10 21:53:17,542 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3608 transitions. Word has length 24 [2021-03-10 21:53:17,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:17,542 INFO L480 AbstractCegarLoop]: Abstraction has 1094 states and 3608 transitions. [2021-03-10 21:53:17,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:17,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3608 transitions. [2021-03-10 21:53:17,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:17,544 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:17,544 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:17,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable945 [2021-03-10 21:53:17,744 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:17,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:17,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1261086646, now seen corresponding path program 119 times [2021-03-10 21:53:17,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:17,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260019195] [2021-03-10 21:53:17,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:17,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260019195] [2021-03-10 21:53:17,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286526197] [2021-03-10 21:53:17,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:17,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:53:17,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:17,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:53:17,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:18,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:18,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:18,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:18,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:18,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:18,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:18,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:18,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:18,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:18,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:18,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:18,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:18,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:18,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:18,226 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:18,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:18,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:53:18,294 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:53:18,417 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_505, v_prenex_507, o_4, v_prenex_509], 1=[v_prenex_504, o_0, v_prenex_506, v_prenex_508]} [2021-03-10 21:53:18,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:53:18,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:18,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:53:18,428 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:18,676 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-03-10 21:53:18,677 INFO L628 ElimStorePlain]: treesize reduction 153, result has 54.1 percent of original size [2021-03-10 21:53:18,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:18,682 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:18,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:18,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:53:18,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:18,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:53:18,791 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:18,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:18,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:18,890 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:18,990 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 21:53:18,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:18,990 INFO L518 ElimStorePlain]: Eliminatee v_prenex_504 vanished before elimination [2021-03-10 21:53:18,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:18,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:53:18,996 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:19,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:19,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:19,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:19,090 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:19,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:19,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:19,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:19,181 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:19,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:19,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:53:19,265 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:345, output treesize:96 [2021-03-10 21:53:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:19,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:19,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:53:19,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356534803] [2021-03-10 21:53:19,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:53:19,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:19,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:53:19,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:53:19,455 INFO L87 Difference]: Start difference. First operand 1094 states and 3608 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:19,804 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-03-10 21:53:20,225 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-10 21:53:20,407 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-03-10 21:53:20,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:20,805 INFO L93 Difference]: Finished difference Result 1499 states and 4701 transitions. [2021-03-10 21:53:20,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:53:20,806 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:20,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:20,808 INFO L225 Difference]: With dead ends: 1499 [2021-03-10 21:53:20,808 INFO L226 Difference]: Without dead ends: 1411 [2021-03-10 21:53:20,808 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1403.9ms TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:53:20,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-03-10 21:53:20,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1099. [2021-03-10 21:53:20,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 1098 states have (on average 3.3096539162112935) internal successors, (3634), 1098 states have internal predecessors, (3634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:20,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 3634 transitions. [2021-03-10 21:53:20,822 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 3634 transitions. Word has length 24 [2021-03-10 21:53:20,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:20,822 INFO L480 AbstractCegarLoop]: Abstraction has 1099 states and 3634 transitions. [2021-03-10 21:53:20,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:20,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 3634 transitions. [2021-03-10 21:53:20,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:20,823 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:20,823 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:21,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable953 [2021-03-10 21:53:21,024 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:21,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:21,024 INFO L82 PathProgramCache]: Analyzing trace with hash -2141360182, now seen corresponding path program 120 times [2021-03-10 21:53:21,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:21,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284862703] [2021-03-10 21:53:21,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:53:21,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284862703] [2021-03-10 21:53:21,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438892802] [2021-03-10 21:53:21,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:21,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:53:21,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:21,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:53:21,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:21,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:21,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:21,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:21,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:21,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:21,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:21,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:21,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:21,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:53:21,561 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-03-10 21:53:21,629 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_513], 1=[o_0, v_prenex_512]} [2021-03-10 21:53:21,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:53:21,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:21,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:53:21,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:21,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:21,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:21,716 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:21,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:21,720 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:21,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:21,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:21,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:21,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:53:21,792 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:21,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:21,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:53:21,797 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:21,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:21,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:21,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:21,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:21,867 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:21,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:21,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:21,872 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:21,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:21,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:53:21,934 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:153, output treesize:69 [2021-03-10 21:53:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:53:22,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:22,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:53:22,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158258323] [2021-03-10 21:53:22,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:53:22,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:22,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:53:22,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:53:22,127 INFO L87 Difference]: Start difference. First operand 1099 states and 3634 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:22,479 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-03-10 21:53:23,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:23,232 INFO L93 Difference]: Finished difference Result 1507 states and 4741 transitions. [2021-03-10 21:53:23,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:53:23,232 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:23,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:23,235 INFO L225 Difference]: With dead ends: 1507 [2021-03-10 21:53:23,235 INFO L226 Difference]: Without dead ends: 1469 [2021-03-10 21:53:23,235 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1155.9ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:53:23,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2021-03-10 21:53:23,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1099. [2021-03-10 21:53:23,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 1098 states have (on average 3.3105646630236794) internal successors, (3635), 1098 states have internal predecessors, (3635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:23,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 3635 transitions. [2021-03-10 21:53:23,249 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 3635 transitions. Word has length 24 [2021-03-10 21:53:23,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:23,249 INFO L480 AbstractCegarLoop]: Abstraction has 1099 states and 3635 transitions. [2021-03-10 21:53:23,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:23,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 3635 transitions. [2021-03-10 21:53:23,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:23,251 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:23,251 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:23,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable961 [2021-03-10 21:53:23,451 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:23,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:23,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2090031362, now seen corresponding path program 121 times [2021-03-10 21:53:23,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:23,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373544194] [2021-03-10 21:53:23,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:23,583 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:23,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373544194] [2021-03-10 21:53:23,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692778785] [2021-03-10 21:53:23,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:23,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:53:23,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:23,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:53:23,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:23,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:53:23,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:23,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:23,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:23,738 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-03-10 21:53:23,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:23,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:23,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:23,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:23,868 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-03-10 21:53:23,868 INFO L518 ElimStorePlain]: Eliminatee v_prenex_515 vanished before elimination [2021-03-10 21:53:23,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:23,872 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:23,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:23,900 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:53:23,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:23,901 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:40 [2021-03-10 21:53:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:24,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:24,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:53:24,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375135621] [2021-03-10 21:53:24,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:53:24,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:24,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:53:24,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:53:24,014 INFO L87 Difference]: Start difference. First operand 1099 states and 3635 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:24,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:24,664 INFO L93 Difference]: Finished difference Result 1453 states and 4595 transitions. [2021-03-10 21:53:24,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:53:24,665 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:24,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:24,667 INFO L225 Difference]: With dead ends: 1453 [2021-03-10 21:53:24,667 INFO L226 Difference]: Without dead ends: 1322 [2021-03-10 21:53:24,667 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 612.3ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:53:24,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2021-03-10 21:53:24,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1120. [2021-03-10 21:53:24,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 3.310991957104558) internal successors, (3705), 1119 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3705 transitions. [2021-03-10 21:53:24,680 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3705 transitions. Word has length 24 [2021-03-10 21:53:24,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:24,680 INFO L480 AbstractCegarLoop]: Abstraction has 1120 states and 3705 transitions. [2021-03-10 21:53:24,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:24,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3705 transitions. [2021-03-10 21:53:24,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:24,682 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:24,682 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:24,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable971 [2021-03-10 21:53:24,895 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:24,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:24,895 INFO L82 PathProgramCache]: Analyzing trace with hash -757732052, now seen corresponding path program 122 times [2021-03-10 21:53:24,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:24,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379673406] [2021-03-10 21:53:24,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:25,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379673406] [2021-03-10 21:53:25,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207926887] [2021-03-10 21:53:25,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:25,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:53:25,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:25,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:53:25,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:25,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:25,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:25,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:25,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:25,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:25,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:25,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:25,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:25,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:53:25,483 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-03-10 21:53:25,556 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_519], 1=[o_2, v_prenex_518]} [2021-03-10 21:53:25,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:25,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:25,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:25,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:25,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:25,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:25,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:25,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:25,631 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:25,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:25,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:25,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:25,665 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:25,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:25,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:25,694 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:31 [2021-03-10 21:53:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:25,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:25,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:53:25,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137544370] [2021-03-10 21:53:25,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:53:25,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:25,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:53:25,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:53:25,816 INFO L87 Difference]: Start difference. First operand 1120 states and 3705 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:26,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:26,341 INFO L93 Difference]: Finished difference Result 1363 states and 4381 transitions. [2021-03-10 21:53:26,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:53:26,341 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:26,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:26,343 INFO L225 Difference]: With dead ends: 1363 [2021-03-10 21:53:26,344 INFO L226 Difference]: Without dead ends: 1301 [2021-03-10 21:53:26,344 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 726.0ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:53:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-03-10 21:53:26,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1124. [2021-03-10 21:53:26,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1123 states have (on average 3.3143365983971504) internal successors, (3722), 1123 states have internal predecessors, (3722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:26,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 3722 transitions. [2021-03-10 21:53:26,357 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 3722 transitions. Word has length 24 [2021-03-10 21:53:26,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:26,357 INFO L480 AbstractCegarLoop]: Abstraction has 1124 states and 3722 transitions. [2021-03-10 21:53:26,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:26,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 3722 transitions. [2021-03-10 21:53:26,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:26,358 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:26,358 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:26,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable976,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:26,572 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:26,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:26,572 INFO L82 PathProgramCache]: Analyzing trace with hash -126527550, now seen corresponding path program 123 times [2021-03-10 21:53:26,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:26,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890515518] [2021-03-10 21:53:26,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:26,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890515518] [2021-03-10 21:53:26,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899999881] [2021-03-10 21:53:26,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:26,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:53:26,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:26,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:53:26,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:27,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:27,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:27,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:27,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:27,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:27,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:27,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:27,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:27,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:27,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:27,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:27,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:27,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:27,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:27,139 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:27,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:27,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:53:27,208 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:53:27,336 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_525, v_prenex_527, v_prenex_529, o_4], 1=[v_prenex_526, v_prenex_528, o_2, v_prenex_524]} [2021-03-10 21:53:27,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:53:27,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:27,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:53:27,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:27,600 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-03-10 21:53:27,600 INFO L628 ElimStorePlain]: treesize reduction 159, result has 52.3 percent of original size [2021-03-10 21:53:27,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:27,605 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:27,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:27,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:27,709 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:27,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:27,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:53:27,809 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:27,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:27,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:27,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:27,908 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:27,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:28,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:28,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:28,004 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:28,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:28,093 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-03-10 21:53:28,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:28,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:53:28,100 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:28,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:28,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:53:28,186 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:345, output treesize:96 [2021-03-10 21:53:28,390 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:28,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:28,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:53:28,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622085147] [2021-03-10 21:53:28,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:53:28,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:28,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:53:28,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:53:28,391 INFO L87 Difference]: Start difference. First operand 1124 states and 3722 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:29,145 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-03-10 21:53:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:29,720 INFO L93 Difference]: Finished difference Result 1615 states and 5120 transitions. [2021-03-10 21:53:29,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:53:29,721 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:29,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:29,724 INFO L225 Difference]: With dead ends: 1615 [2021-03-10 21:53:29,724 INFO L226 Difference]: Without dead ends: 1535 [2021-03-10 21:53:29,724 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1466.8ms TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:53:29,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2021-03-10 21:53:29,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1138. [2021-03-10 21:53:29,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 3.3236587510993845) internal successors, (3779), 1137 states have internal predecessors, (3779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:29,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 3779 transitions. [2021-03-10 21:53:29,739 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 3779 transitions. Word has length 24 [2021-03-10 21:53:29,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:29,739 INFO L480 AbstractCegarLoop]: Abstraction has 1138 states and 3779 transitions. [2021-03-10 21:53:29,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:29,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 3779 transitions. [2021-03-10 21:53:29,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:29,741 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:29,741 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:29,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable984 [2021-03-10 21:53:29,941 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:29,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:29,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1473062914, now seen corresponding path program 124 times [2021-03-10 21:53:29,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:29,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081986388] [2021-03-10 21:53:29,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:29,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:30,241 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:30,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081986388] [2021-03-10 21:53:30,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258981474] [2021-03-10 21:53:30,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:30,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:53:30,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:30,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:53:30,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:30,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:30,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:30,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:30,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:30,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:30,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:30,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:30,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:30,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:30,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:30,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:30,520 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:30,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:30,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:30,524 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:30,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:30,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:53:30,594 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:53:30,724 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_537, v_prenex_539, o_4, v_prenex_535], 1=[v_prenex_536, v_prenex_538, o_2, v_prenex_534]} [2021-03-10 21:53:30,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:30,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:30,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:30,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:30,994 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-03-10 21:53:30,995 INFO L628 ElimStorePlain]: treesize reduction 150, result has 55.0 percent of original size [2021-03-10 21:53:30,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:53:31,000 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:31,105 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 21:53:31,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:31,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:31,110 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:31,217 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 21:53:31,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:31,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:53:31,223 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:31,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:53:31,227 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:31,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:31,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:31,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:31,327 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:31,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:31,416 INFO L518 ElimStorePlain]: Eliminatee v_prenex_538 vanished before elimination [2021-03-10 21:53:31,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:31,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:31,423 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:31,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:31,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:31,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:53:31,516 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:31,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:31,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:53:31,602 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:345, output treesize:96 [2021-03-10 21:53:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:31,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:31,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:53:31,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577698643] [2021-03-10 21:53:31,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:53:31,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:31,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:53:31,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:53:31,801 INFO L87 Difference]: Start difference. First operand 1138 states and 3779 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:32,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:32,910 INFO L93 Difference]: Finished difference Result 1641 states and 5142 transitions. [2021-03-10 21:53:32,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:53:32,911 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:32,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:32,913 INFO L225 Difference]: With dead ends: 1641 [2021-03-10 21:53:32,913 INFO L226 Difference]: Without dead ends: 1550 [2021-03-10 21:53:32,914 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1246.7ms TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:53:32,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2021-03-10 21:53:32,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1140. [2021-03-10 21:53:32,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.324846356453029) internal successors, (3787), 1139 states have internal predecessors, (3787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:32,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3787 transitions. [2021-03-10 21:53:32,928 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3787 transitions. Word has length 24 [2021-03-10 21:53:32,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:32,928 INFO L480 AbstractCegarLoop]: Abstraction has 1140 states and 3787 transitions. [2021-03-10 21:53:32,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:32,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3787 transitions. [2021-03-10 21:53:32,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:32,930 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:32,930 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:33,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable992 [2021-03-10 21:53:33,130 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:33,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:33,131 INFO L82 PathProgramCache]: Analyzing trace with hash 647676820, now seen corresponding path program 125 times [2021-03-10 21:53:33,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:33,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975217727] [2021-03-10 21:53:33,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:33,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:33,396 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:33,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975217727] [2021-03-10 21:53:33,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985851924] [2021-03-10 21:53:33,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:33,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:53:33,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:33,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:53:33,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:33,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:33,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:33,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:33,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:33,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:33,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:33,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:33,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:33,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:33,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:33,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:33,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:33,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:33,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:33,680 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:33,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:33,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:53:33,750 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:53:33,920 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_545], 1=[o_2, v_prenex_544]} [2021-03-10 21:53:33,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:33,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:33,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:33,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:34,023 INFO L628 ElimStorePlain]: treesize reduction 89, result has 41.8 percent of original size [2021-03-10 21:53:34,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:53:34,027 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:34,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:34,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:34,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:34,066 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:34,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:34,098 INFO L518 ElimStorePlain]: Eliminatee v_prenex_544 vanished before elimination [2021-03-10 21:53:34,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:34,099 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:165, output treesize:34 [2021-03-10 21:53:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:34,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:34,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:53:34,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869153290] [2021-03-10 21:53:34,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:53:34,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:34,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:53:34,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:53:34,212 INFO L87 Difference]: Start difference. First operand 1140 states and 3787 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:35,024 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-03-10 21:53:35,382 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-03-10 21:53:35,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:35,521 INFO L93 Difference]: Finished difference Result 1719 states and 5395 transitions. [2021-03-10 21:53:35,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:53:35,522 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:35,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:35,525 INFO L225 Difference]: With dead ends: 1719 [2021-03-10 21:53:35,525 INFO L226 Difference]: Without dead ends: 1572 [2021-03-10 21:53:35,525 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1346.3ms TimeCoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:53:35,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-03-10 21:53:35,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1147. [2021-03-10 21:53:35,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 3.3350785340314135) internal successors, (3822), 1146 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:35,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 3822 transitions. [2021-03-10 21:53:35,540 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 3822 transitions. Word has length 24 [2021-03-10 21:53:35,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:35,540 INFO L480 AbstractCegarLoop]: Abstraction has 1147 states and 3822 transitions. [2021-03-10 21:53:35,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:35,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 3822 transitions. [2021-03-10 21:53:35,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:35,541 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:35,542 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:35,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1000 [2021-03-10 21:53:35,743 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:35,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:35,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1362836528, now seen corresponding path program 126 times [2021-03-10 21:53:35,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:35,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787387115] [2021-03-10 21:53:35,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:35,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787387115] [2021-03-10 21:53:35,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086451368] [2021-03-10 21:53:35,922 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 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 [2021-03-10 21:53:35,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:53:35,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:35,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:53:35,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:36,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:53:36,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:36,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:53:36,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:36,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:36,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:36,114 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-03-10 21:53:36,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:36,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:36,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:36,196 INFO L518 ElimStorePlain]: Eliminatee v_prenex_548 vanished before elimination [2021-03-10 21:53:36,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:36,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:36,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:36,224 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:53:36,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:36,224 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-03-10 21:53:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:36,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:36,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:53:36,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578000067] [2021-03-10 21:53:36,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:53:36,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:36,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:53:36,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:53:36,373 INFO L87 Difference]: Start difference. First operand 1147 states and 3822 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:36,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:36,919 INFO L93 Difference]: Finished difference Result 1555 states and 4986 transitions. [2021-03-10 21:53:36,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:53:36,920 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:36,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:36,922 INFO L225 Difference]: With dead ends: 1555 [2021-03-10 21:53:36,922 INFO L226 Difference]: Without dead ends: 1517 [2021-03-10 21:53:36,922 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 558.9ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:36,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-03-10 21:53:36,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1146. [2021-03-10 21:53:36,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 3.3187772925764194) internal successors, (3800), 1145 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:36,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 3800 transitions. [2021-03-10 21:53:36,936 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 3800 transitions. Word has length 24 [2021-03-10 21:53:36,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:36,936 INFO L480 AbstractCegarLoop]: Abstraction has 1146 states and 3800 transitions. [2021-03-10 21:53:36,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:36,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 3800 transitions. [2021-03-10 21:53:36,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:36,938 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:36,938 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:37,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1008,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:37,140 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:37,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:37,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1055041082, now seen corresponding path program 127 times [2021-03-10 21:53:37,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:37,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289972527] [2021-03-10 21:53:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:37,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289972527] [2021-03-10 21:53:37,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517822758] [2021-03-10 21:53:37,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:37,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:53:37,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:37,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:53:37,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:37,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:53:37,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:37,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:37,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:37,602 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-03-10 21:53:37,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:37,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:37,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:37,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:37,737 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-03-10 21:53:37,737 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:53:37,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:37,740 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:37,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:37,769 INFO L518 ElimStorePlain]: Eliminatee v_prenex_551 vanished before elimination [2021-03-10 21:53:37,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:37,770 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:40 [2021-03-10 21:53:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:37,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:37,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:53:37,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230135747] [2021-03-10 21:53:37,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:53:37,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:37,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:53:37,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:53:37,895 INFO L87 Difference]: Start difference. First operand 1146 states and 3800 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:38,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:38,802 INFO L93 Difference]: Finished difference Result 1806 states and 5652 transitions. [2021-03-10 21:53:38,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:53:38,803 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:38,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:38,805 INFO L225 Difference]: With dead ends: 1806 [2021-03-10 21:53:38,805 INFO L226 Difference]: Without dead ends: 1659 [2021-03-10 21:53:38,806 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 924.0ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:53:38,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-03-10 21:53:38,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1135. [2021-03-10 21:53:38,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 3.2980599647266313) internal successors, (3740), 1134 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:38,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 3740 transitions. [2021-03-10 21:53:38,819 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 3740 transitions. Word has length 24 [2021-03-10 21:53:38,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:38,819 INFO L480 AbstractCegarLoop]: Abstraction has 1135 states and 3740 transitions. [2021-03-10 21:53:38,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:38,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 3740 transitions. [2021-03-10 21:53:38,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:38,821 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:38,821 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:39,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1016 [2021-03-10 21:53:39,021 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:39,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:39,021 INFO L82 PathProgramCache]: Analyzing trace with hash 65109652, now seen corresponding path program 128 times [2021-03-10 21:53:39,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:39,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049196609] [2021-03-10 21:53:39,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:39,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049196609] [2021-03-10 21:53:39,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697613] [2021-03-10 21:53:39,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:39,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:53:39,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:39,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:53:39,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:39,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:53:39,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:39,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:53:39,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:39,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:39,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:39,385 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-03-10 21:53:39,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:39,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:39,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:53:39,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:39,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:39,505 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:53:39,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:39,506 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:37 [2021-03-10 21:53:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:39,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:39,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:53:39,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865938271] [2021-03-10 21:53:39,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:53:39,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:39,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:53:39,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:53:39,634 INFO L87 Difference]: Start difference. First operand 1135 states and 3740 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:40,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:40,233 INFO L93 Difference]: Finished difference Result 1843 states and 5874 transitions. [2021-03-10 21:53:40,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:53:40,234 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:40,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:40,237 INFO L225 Difference]: With dead ends: 1843 [2021-03-10 21:53:40,237 INFO L226 Difference]: Without dead ends: 1781 [2021-03-10 21:53:40,237 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 669.0ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:53:40,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-03-10 21:53:40,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1148. [2021-03-10 21:53:40,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.3060156931124673) internal successors, (3792), 1147 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:40,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3792 transitions. [2021-03-10 21:53:40,252 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3792 transitions. Word has length 24 [2021-03-10 21:53:40,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:40,252 INFO L480 AbstractCegarLoop]: Abstraction has 1148 states and 3792 transitions. [2021-03-10 21:53:40,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:40,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3792 transitions. [2021-03-10 21:53:40,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:40,254 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:40,254 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:40,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-03-10 21:53:40,467 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:40,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:40,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1665315992, now seen corresponding path program 129 times [2021-03-10 21:53:40,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:40,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167829604] [2021-03-10 21:53:40,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:40,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167829604] [2021-03-10 21:53:40,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141103639] [2021-03-10 21:53:40,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:40,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:53:40,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:40,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:53:40,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:40,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:40,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:40,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:40,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:40,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:40,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:40,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:40,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:40,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:40,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:40,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:41,000 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:41,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:41,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:41,004 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:41,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:41,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:53:41,068 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-03-10 21:53:41,288 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_559, o_4, v_prenex_561, v_prenex_557], 1=[v_prenex_558, o_2, v_prenex_560, v_prenex_556]} [2021-03-10 21:53:41,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:53:41,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:41,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:53:41,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:41,572 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-03-10 21:53:41,572 INFO L628 ElimStorePlain]: treesize reduction 153, result has 54.1 percent of original size [2021-03-10 21:53:41,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:41,578 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:41,685 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 21:53:41,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:41,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:41,690 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:41,794 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 21:53:41,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:41,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:53:41,800 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:41,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:53:41,805 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:41,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:41,902 INFO L518 ElimStorePlain]: Eliminatee v_prenex_558 vanished before elimination [2021-03-10 21:53:41,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:41,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:41,912 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:42,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:42,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:42,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:42,016 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:42,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:42,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:42,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:53:42,112 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:42,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:42,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:53:42,201 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:345, output treesize:96 [2021-03-10 21:53:42,413 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:42,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:42,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:53:42,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538485243] [2021-03-10 21:53:42,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:53:42,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:42,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:53:42,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:53:42,414 INFO L87 Difference]: Start difference. First operand 1148 states and 3792 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:43,001 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-10 21:53:43,245 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-03-10 21:53:43,437 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-10 21:53:43,713 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-03-10 21:53:43,912 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-03-10 21:53:44,041 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-10 21:53:44,545 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-03-10 21:53:44,921 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-03-10 21:53:44,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:44,928 INFO L93 Difference]: Finished difference Result 1920 states and 6108 transitions. [2021-03-10 21:53:44,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:53:44,929 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:44,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:44,932 INFO L225 Difference]: With dead ends: 1920 [2021-03-10 21:53:44,932 INFO L226 Difference]: Without dead ends: 1840 [2021-03-10 21:53:44,932 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2559.4ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:53:44,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-03-10 21:53:44,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1176. [2021-03-10 21:53:44,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 3.32) internal successors, (3901), 1175 states have internal predecessors, (3901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:44,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 3901 transitions. [2021-03-10 21:53:44,948 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 3901 transitions. Word has length 24 [2021-03-10 21:53:44,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:44,948 INFO L480 AbstractCegarLoop]: Abstraction has 1176 states and 3901 transitions. [2021-03-10 21:53:44,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:44,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 3901 transitions. [2021-03-10 21:53:44,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:44,950 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:44,950 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:45,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1028 [2021-03-10 21:53:45,163 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:45,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:45,163 INFO L82 PathProgramCache]: Analyzing trace with hash -65725528, now seen corresponding path program 130 times [2021-03-10 21:53:45,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:45,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765279846] [2021-03-10 21:53:45,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:45,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765279846] [2021-03-10 21:53:45,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615001781] [2021-03-10 21:53:45,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:45,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:53:45,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:45,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:53:45,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:45,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:45,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:45,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:45,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:45,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:45,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:45,656 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:45,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:45,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:45,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:45,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:45,738 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:45,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:45,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:45,742 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:45,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:45,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:53:45,807 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-03-10 21:53:46,029 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_569, o_4, v_prenex_571, v_prenex_567], 1=[o_2, v_prenex_570, v_prenex_566, v_prenex_568]} [2021-03-10 21:53:46,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:53:46,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:46,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:53:46,041 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:46,292 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-03-10 21:53:46,293 INFO L628 ElimStorePlain]: treesize reduction 159, result has 52.3 percent of original size [2021-03-10 21:53:46,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:46,298 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:46,401 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 21:53:46,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:46,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:46,406 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:46,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:46,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:53:46,511 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:46,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:46,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:46,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:46,613 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:46,714 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-10 21:53:46,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:46,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:46,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:46,721 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:46,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:46,812 INFO L518 ElimStorePlain]: Eliminatee v_prenex_566 vanished before elimination [2021-03-10 21:53:46,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:46,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:53:46,820 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:46,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:46,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:53:46,910 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:345, output treesize:96 [2021-03-10 21:53:47,123 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:47,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:47,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:53:47,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144023553] [2021-03-10 21:53:47,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:53:47,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:47,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:53:47,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:53:47,124 INFO L87 Difference]: Start difference. First operand 1176 states and 3901 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:47,899 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-03-10 21:53:48,250 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-10 21:53:48,538 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-03-10 21:53:48,954 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-03-10 21:53:49,218 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-03-10 21:53:49,389 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-03-10 21:53:49,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:49,489 INFO L93 Difference]: Finished difference Result 2093 states and 6518 transitions. [2021-03-10 21:53:49,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:53:49,490 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:49,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:49,494 INFO L225 Difference]: With dead ends: 2093 [2021-03-10 21:53:49,494 INFO L226 Difference]: Without dead ends: 1975 [2021-03-10 21:53:49,494 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2439.1ms TimeCoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:53:49,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-03-10 21:53:49,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1173. [2021-03-10 21:53:49,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.319965870307167) internal successors, (3891), 1172 states have internal predecessors, (3891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:49,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3891 transitions. [2021-03-10 21:53:49,511 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3891 transitions. Word has length 24 [2021-03-10 21:53:49,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:49,511 INFO L480 AbstractCegarLoop]: Abstraction has 1173 states and 3891 transitions. [2021-03-10 21:53:49,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:49,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3891 transitions. [2021-03-10 21:53:49,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:49,513 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:49,513 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:49,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1036,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:49,713 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:49,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:49,713 INFO L82 PathProgramCache]: Analyzing trace with hash -891111622, now seen corresponding path program 131 times [2021-03-10 21:53:49,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:49,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899048862] [2021-03-10 21:53:49,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:50,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899048862] [2021-03-10 21:53:50,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628046808] [2021-03-10 21:53:50,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:50,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:53:50,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:50,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:53:50,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:50,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:50,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:50,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:50,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:50,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:50,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:50,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:50,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:50,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:50,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:50,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:50,317 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:50,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:50,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:50,322 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:50,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:50,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:53:50,385 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-03-10 21:53:50,652 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_577], 1=[o_2, v_prenex_576]} [2021-03-10 21:53:50,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:50,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:50,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:50,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:50,761 INFO L628 ElimStorePlain]: treesize reduction 83, result has 45.8 percent of original size [2021-03-10 21:53:50,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:50,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:50,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:50,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:50,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:50,814 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:50,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:50,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:50,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:50,855 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:50,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:50,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:50,890 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:34 [2021-03-10 21:53:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:51,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:51,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:53:51,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859415656] [2021-03-10 21:53:51,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:53:51,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:51,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:53:51,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:53:51,007 INFO L87 Difference]: Start difference. First operand 1173 states and 3891 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:51,918 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-10 21:53:52,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:52,658 INFO L93 Difference]: Finished difference Result 1919 states and 6114 transitions. [2021-03-10 21:53:52,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:53:52,659 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:52,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:52,662 INFO L225 Difference]: With dead ends: 1919 [2021-03-10 21:53:52,662 INFO L226 Difference]: Without dead ends: 1807 [2021-03-10 21:53:52,662 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1812.3ms TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:53:52,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-03-10 21:53:52,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1177. [2021-03-10 21:53:52,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 3.324829931972789) internal successors, (3910), 1176 states have internal predecessors, (3910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:52,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 3910 transitions. [2021-03-10 21:53:52,678 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 3910 transitions. Word has length 24 [2021-03-10 21:53:52,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:52,678 INFO L480 AbstractCegarLoop]: Abstraction has 1177 states and 3910 transitions. [2021-03-10 21:53:52,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:52,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 3910 transitions. [2021-03-10 21:53:52,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:52,687 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:52,687 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:52,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1044 [2021-03-10 21:53:52,887 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:52,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:52,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1053116852, now seen corresponding path program 132 times [2021-03-10 21:53:52,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:52,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986869108] [2021-03-10 21:53:52,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:53,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986869108] [2021-03-10 21:53:53,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208297581] [2021-03-10 21:53:53,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:53,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:53:53,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:53,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:53:53,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:53,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:53,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:53,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:53,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:53,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:53,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:53,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:53,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:53,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:53,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:53,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:53,312 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:53,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:53,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:53,316 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:53,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:53,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:53:53,380 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-03-10 21:53:53,605 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_583], 1=[o_2, v_prenex_582]} [2021-03-10 21:53:53,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:53,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:53,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:53,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:53,717 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-03-10 21:53:53,718 INFO L628 ElimStorePlain]: treesize reduction 83, result has 45.8 percent of original size [2021-03-10 21:53:53,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:53,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:53,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:53,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:53,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:53,765 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:53,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:53,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:53,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:53,808 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:53,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:53,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:53:53,843 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:34 [2021-03-10 21:53:53,955 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:53,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:53,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:53:53,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145139244] [2021-03-10 21:53:53,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:53:53,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:53,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:53:53,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:53:53,956 INFO L87 Difference]: Start difference. First operand 1177 states and 3910 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:54,723 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-03-10 21:53:55,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:55,407 INFO L93 Difference]: Finished difference Result 2216 states and 7195 transitions. [2021-03-10 21:53:55,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:53:55,408 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:55,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:55,412 INFO L225 Difference]: With dead ends: 2216 [2021-03-10 21:53:55,412 INFO L226 Difference]: Without dead ends: 2131 [2021-03-10 21:53:55,412 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1351.1ms TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:53:55,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-03-10 21:53:55,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1168. [2021-03-10 21:53:55,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.3127677806341045) internal successors, (3866), 1167 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:55,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3866 transitions. [2021-03-10 21:53:55,429 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3866 transitions. Word has length 24 [2021-03-10 21:53:55,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:55,429 INFO L480 AbstractCegarLoop]: Abstraction has 1168 states and 3866 transitions. [2021-03-10 21:53:55,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:55,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3866 transitions. [2021-03-10 21:53:55,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:55,431 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:55,431 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:55,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1052 [2021-03-10 21:53:55,631 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:55,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:55,632 INFO L82 PathProgramCache]: Analyzing trace with hash -189188054, now seen corresponding path program 133 times [2021-03-10 21:53:55,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:55,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106417508] [2021-03-10 21:53:55,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:55,848 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:55,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106417508] [2021-03-10 21:53:55,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320912371] [2021-03-10 21:53:55,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:55,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:53:55,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:56,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:56,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:56,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:53:56,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:56,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:56,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-03-10 21:53:56,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:56,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:56,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:53:56,049 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:57 [2021-03-10 21:53:56,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:56,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:56,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:56,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:56,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:56,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:56,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:56,247 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-03-10 21:53:56,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:56,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:53:56,252 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:56,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:56,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:53:56,267 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:91, output treesize:12 [2021-03-10 21:53:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:56,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:56,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:53:56,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945858531] [2021-03-10 21:53:56,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:53:56,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:56,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:53:56,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:53:56,322 INFO L87 Difference]: Start difference. First operand 1168 states and 3866 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:56,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:56,603 INFO L93 Difference]: Finished difference Result 1239 states and 4031 transitions. [2021-03-10 21:53:56,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:53:56,603 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:56,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:56,605 INFO L225 Difference]: With dead ends: 1239 [2021-03-10 21:53:56,605 INFO L226 Difference]: Without dead ends: 1180 [2021-03-10 21:53:56,606 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 455.7ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:53:56,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-03-10 21:53:56,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1172. [2021-03-10 21:53:56,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 1171 states have (on average 3.312553373185312) internal successors, (3879), 1171 states have internal predecessors, (3879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:56,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 3879 transitions. [2021-03-10 21:53:56,618 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 3879 transitions. Word has length 24 [2021-03-10 21:53:56,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:56,618 INFO L480 AbstractCegarLoop]: Abstraction has 1172 states and 3879 transitions. [2021-03-10 21:53:56,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:56,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 3879 transitions. [2021-03-10 21:53:56,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:56,620 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:56,620 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:56,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1060,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:56,835 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:56,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:56,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1927159870, now seen corresponding path program 134 times [2021-03-10 21:53:56,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:56,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870374394] [2021-03-10 21:53:56,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:56,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:57,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870374394] [2021-03-10 21:53:57,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127007884] [2021-03-10 21:53:57,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:53:57,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:53:57,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:57,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:53:57,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:57,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:57,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:57,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:57,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:57,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:57,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:57,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:57,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:57,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:53:57,300 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:49 [2021-03-10 21:53:57,376 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-03-10 21:53:57,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:57,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:57,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:57,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:57,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:57,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:57,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:53:57,387 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:57,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:57,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:57,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:53:57,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:57,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:57,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:57,397 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:57,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:57,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:57,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:57,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:57,487 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:57,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:57,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:57,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:57,494 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:57,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:57,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:57,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:53:57,501 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:57,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:57,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:53:57,506 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:57,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:57,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:53:57,582 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:173, output treesize:57 [2021-03-10 21:53:57,725 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:57,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:57,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:53:57,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439180715] [2021-03-10 21:53:57,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:53:57,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:57,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:53:57,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:53:57,726 INFO L87 Difference]: Start difference. First operand 1172 states and 3879 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:58,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:58,429 INFO L93 Difference]: Finished difference Result 1303 states and 4238 transitions. [2021-03-10 21:53:58,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:53:58,430 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:58,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:58,433 INFO L225 Difference]: With dead ends: 1303 [2021-03-10 21:53:58,433 INFO L226 Difference]: Without dead ends: 1237 [2021-03-10 21:53:58,433 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 680.0ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:53:58,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-03-10 21:53:58,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1174. [2021-03-10 21:53:58,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 3.311167945439045) internal successors, (3884), 1173 states have internal predecessors, (3884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:58,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 3884 transitions. [2021-03-10 21:53:58,446 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 3884 transitions. Word has length 24 [2021-03-10 21:53:58,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:58,446 INFO L480 AbstractCegarLoop]: Abstraction has 1174 states and 3884 transitions. [2021-03-10 21:53:58,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:58,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 3884 transitions. [2021-03-10 21:53:58,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:58,447 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:58,448 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:58,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:58,648 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:58,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:58,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1830314570, now seen corresponding path program 135 times [2021-03-10 21:53:58,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:58,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717131642] [2021-03-10 21:53:58,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:58,876 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:58,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717131642] [2021-03-10 21:53:58,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548130818] [2021-03-10 21:53:58,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:58,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:53:58,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:58,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:53:58,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:59,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:59,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:59,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:53:59,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:59,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:59,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:53:59,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:59,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:59,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:53:59,082 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:99, output treesize:83 [2021-03-10 21:53:59,198 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-03-10 21:53:59,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:59,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:59,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-03-10 21:53:59,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:59,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:59,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:59,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:59,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:59,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:59,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:59,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:53:59,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:59,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:59,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:53:59,227 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:59,382 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 21:53:59,382 INFO L628 ElimStorePlain]: treesize reduction 62, result has 63.3 percent of original size [2021-03-10 21:53:59,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:59,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:59,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:53:59,389 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:59,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:59,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:59,395 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:59,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:59,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:53:59,459 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:201, output treesize:47 [2021-03-10 21:53:59,579 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:53:59,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:59,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:53:59,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018881061] [2021-03-10 21:53:59,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:53:59,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:59,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:53:59,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:53:59,580 INFO L87 Difference]: Start difference. First operand 1174 states and 3884 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:59,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:59,956 INFO L93 Difference]: Finished difference Result 1235 states and 4021 transitions. [2021-03-10 21:53:59,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:53:59,956 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:53:59,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:59,958 INFO L225 Difference]: With dead ends: 1235 [2021-03-10 21:53:59,959 INFO L226 Difference]: Without dead ends: 1182 [2021-03-10 21:53:59,959 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 485.8ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:53:59,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2021-03-10 21:53:59,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1174. [2021-03-10 21:53:59,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 3.311167945439045) internal successors, (3884), 1173 states have internal predecessors, (3884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:59,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 3884 transitions. [2021-03-10 21:53:59,971 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 3884 transitions. Word has length 24 [2021-03-10 21:53:59,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:59,972 INFO L480 AbstractCegarLoop]: Abstraction has 1174 states and 3884 transitions. [2021-03-10 21:53:59,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:59,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 3884 transitions. [2021-03-10 21:53:59,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:53:59,973 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:59,973 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:00,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1072 [2021-03-10 21:54:00,174 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:00,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:00,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1077890356, now seen corresponding path program 136 times [2021-03-10 21:54:00,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:00,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048574091] [2021-03-10 21:54:00,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:00,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048574091] [2021-03-10 21:54:00,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024976509] [2021-03-10 21:54:00,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:00,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:54:00,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:00,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:54:00,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:00,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:00,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:00,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:00,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:00,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:00,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:00,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:00,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:00,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:00,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:00,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:00,549 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:00,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:00,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:00,554 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:00,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:00,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:54:00,631 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-03-10 21:54:00,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:00,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:00,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:00,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:00,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:00,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:00,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:00,970 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-03-10 21:54:00,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:00,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:00,976 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:00,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:00,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:54:00,991 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:91, output treesize:12 [2021-03-10 21:54:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:01,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:01,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:54:01,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272878409] [2021-03-10 21:54:01,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:01,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:01,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:01,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:01,047 INFO L87 Difference]: Start difference. First operand 1174 states and 3884 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:01,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:01,811 INFO L93 Difference]: Finished difference Result 1314 states and 4225 transitions. [2021-03-10 21:54:01,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:54:01,811 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:54:01,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:01,814 INFO L225 Difference]: With dead ends: 1314 [2021-03-10 21:54:01,814 INFO L226 Difference]: Without dead ends: 1228 [2021-03-10 21:54:01,814 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 851.2ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:54:01,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-03-10 21:54:01,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1187. [2021-03-10 21:54:01,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1186 states have (on average 3.3111298482293425) internal successors, (3927), 1186 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:01,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 3927 transitions. [2021-03-10 21:54:01,826 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 3927 transitions. Word has length 24 [2021-03-10 21:54:01,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:01,827 INFO L480 AbstractCegarLoop]: Abstraction has 1187 states and 3927 transitions. [2021-03-10 21:54:01,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:01,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 3927 transitions. [2021-03-10 21:54:01,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:01,828 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:01,828 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:02,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1080,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:02,028 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:02,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:02,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1479105124, now seen corresponding path program 137 times [2021-03-10 21:54:02,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:02,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198375841] [2021-03-10 21:54:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:02,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198375841] [2021-03-10 21:54:02,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263921461] [2021-03-10 21:54:02,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:54:02,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:54:02,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:02,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:54:02,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:02,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:02,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-03-10 21:54:02,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 21:54:02,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:02,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-03-10 21:54:02,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:54:02,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:02,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-03-10 21:54:02,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:54:02,499 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:02,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-03-10 21:54:02,501 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:54:02,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:02,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:54:02,572 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:149, output treesize:133 [2021-03-10 21:54:02,756 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_591], 1=[o_0, v_prenex_590]} [2021-03-10 21:54:02,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:54:02,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:02,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-03-10 21:54:02,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:02,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-03-10 21:54:02,771 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:02,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:54:02,776 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:02,969 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-03-10 21:54:02,969 INFO L628 ElimStorePlain]: treesize reduction 75, result has 69.4 percent of original size [2021-03-10 21:54:02,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:54:02,974 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:02,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:54:02,979 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:02,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-03-10 21:54:02,983 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:03,123 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-03-10 21:54:03,124 INFO L628 ElimStorePlain]: treesize reduction 24, result has 83.6 percent of original size [2021-03-10 21:54:03,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:03,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-03-10 21:54:03,129 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:03,261 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-10 21:54:03,261 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.6 percent of original size [2021-03-10 21:54:03,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:03,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-03-10 21:54:03,267 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:03,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:03,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:54:03,331 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:275, output treesize:96 [2021-03-10 21:54:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:03,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:03,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-03-10 21:54:03,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592868077] [2021-03-10 21:54:03,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:54:03,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:03,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:54:03,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:54:03,663 INFO L87 Difference]: Start difference. First operand 1187 states and 3927 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 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) [2021-03-10 21:54:04,146 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-03-10 21:54:04,303 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 21:54:04,491 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-03-10 21:54:04,764 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-10 21:54:04,892 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-03-10 21:54:05,211 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-03-10 21:54:05,495 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-03-10 21:54:05,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:05,891 INFO L93 Difference]: Finished difference Result 1879 states and 5611 transitions. [2021-03-10 21:54:05,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:54:05,892 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 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 24 [2021-03-10 21:54:05,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:05,900 INFO L225 Difference]: With dead ends: 1879 [2021-03-10 21:54:05,900 INFO L226 Difference]: Without dead ends: 1747 [2021-03-10 21:54:05,901 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2379.9ms TimeCoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:54:05,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-03-10 21:54:05,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1291. [2021-03-10 21:54:05,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1290 states have (on average 3.2906976744186047) internal successors, (4245), 1290 states have internal predecessors, (4245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:05,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 4245 transitions. [2021-03-10 21:54:05,918 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 4245 transitions. Word has length 24 [2021-03-10 21:54:05,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:05,918 INFO L480 AbstractCegarLoop]: Abstraction has 1291 states and 4245 transitions. [2021-03-10 21:54:05,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 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) [2021-03-10 21:54:05,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 4245 transitions. [2021-03-10 21:54:05,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:05,920 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:05,920 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:06,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1086,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:06,121 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:06,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:06,121 INFO L82 PathProgramCache]: Analyzing trace with hash 985351338, now seen corresponding path program 138 times [2021-03-10 21:54:06,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:06,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748775253] [2021-03-10 21:54:06,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:06,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748775253] [2021-03-10 21:54:06,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885028236] [2021-03-10 21:54:06,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:06,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:54:06,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:06,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:54:06,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:06,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:06,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:06,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:06,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:06,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:06,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:06,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:06,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:06,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:54:06,534 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-03-10 21:54:06,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:06,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:06,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:06,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:06,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:06,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:06,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:06,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:06,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:06,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:06,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:06,736 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:06,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:06,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:06,742 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:06,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:06,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:54:06,778 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-03-10 21:54:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:06,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:06,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:54:06,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736158856] [2021-03-10 21:54:06,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:06,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:06,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:06,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:06,867 INFO L87 Difference]: Start difference. First operand 1291 states and 4245 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:07,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:07,557 INFO L93 Difference]: Finished difference Result 1419 states and 4545 transitions. [2021-03-10 21:54:07,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:54:07,558 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:54:07,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:07,560 INFO L225 Difference]: With dead ends: 1419 [2021-03-10 21:54:07,560 INFO L226 Difference]: Without dead ends: 1300 [2021-03-10 21:54:07,560 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 736.7ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:54:07,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2021-03-10 21:54:07,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1272. [2021-03-10 21:54:07,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1271 states have (on average 3.288749016522423) internal successors, (4180), 1271 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:07,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 4180 transitions. [2021-03-10 21:54:07,575 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 4180 transitions. Word has length 24 [2021-03-10 21:54:07,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:07,575 INFO L480 AbstractCegarLoop]: Abstraction has 1272 states and 4180 transitions. [2021-03-10 21:54:07,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:07,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 4180 transitions. [2021-03-10 21:54:07,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:07,576 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:07,576 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:07,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1099 [2021-03-10 21:54:07,777 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:07,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:07,777 INFO L82 PathProgramCache]: Analyzing trace with hash -335235380, now seen corresponding path program 139 times [2021-03-10 21:54:07,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:07,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189108643] [2021-03-10 21:54:07,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:08,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:08,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189108643] [2021-03-10 21:54:08,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619520210] [2021-03-10 21:54:08,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:08,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:54:08,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:08,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:08,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:08,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:08,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:08,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:08,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:08,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:08,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:08,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:08,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:08,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:08,196 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:08,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:08,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:08,201 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:08,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:08,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:54:08,279 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-03-10 21:54:08,540 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-03-10 21:54:08,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:08,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:08,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:08,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:08,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:08,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:08,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:08,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:08,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:08,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:08,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:08,557 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:08,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:08,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:08,562 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:08,676 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-03-10 21:54:08,677 INFO L628 ElimStorePlain]: treesize reduction 93, result has 46.2 percent of original size [2021-03-10 21:54:08,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:08,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:08,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:54:08,684 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:08,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:08,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:54:08,690 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:08,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:08,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:54:08,737 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:197, output treesize:34 [2021-03-10 21:54:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:08,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:08,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:54:08,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877940531] [2021-03-10 21:54:08,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:54:08,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:08,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:54:08,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:54:08,839 INFO L87 Difference]: Start difference. First operand 1272 states and 4180 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:09,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:09,178 INFO L93 Difference]: Finished difference Result 1345 states and 4362 transitions. [2021-03-10 21:54:09,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:54:09,179 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:54:09,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:09,181 INFO L225 Difference]: With dead ends: 1345 [2021-03-10 21:54:09,181 INFO L226 Difference]: Without dead ends: 1285 [2021-03-10 21:54:09,182 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 559.6ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:09,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-03-10 21:54:09,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1265. [2021-03-10 21:54:09,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.2903481012658227) internal successors, (4159), 1264 states have internal predecessors, (4159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:09,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4159 transitions. [2021-03-10 21:54:09,196 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4159 transitions. Word has length 24 [2021-03-10 21:54:09,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:09,196 INFO L480 AbstractCegarLoop]: Abstraction has 1265 states and 4159 transitions. [2021-03-10 21:54:09,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:09,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4159 transitions. [2021-03-10 21:54:09,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:09,197 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:09,197 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:09,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1105 [2021-03-10 21:54:09,398 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:09,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:09,398 INFO L82 PathProgramCache]: Analyzing trace with hash -509127550, now seen corresponding path program 140 times [2021-03-10 21:54:09,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:09,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754965708] [2021-03-10 21:54:09,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:09,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754965708] [2021-03-10 21:54:09,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476879937] [2021-03-10 21:54:09,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:09,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:54:09,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:09,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:54:09,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:09,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:09,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:09,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:09,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:09,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:09,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:09,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:09,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:09,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:54:09,842 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-03-10 21:54:09,927 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-03-10 21:54:09,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:09,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:09,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:09,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:09,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:09,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:09,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:09,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:09,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:09,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:09,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:09,945 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:09,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:09,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:09,950 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:10,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:10,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:10,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:10,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:54:10,052 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:10,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:10,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:10,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:54:10,059 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:10,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:10,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:10,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:54:10,066 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:10,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:10,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:54:10,073 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:10,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:10,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:54:10,161 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:185, output treesize:69 [2021-03-10 21:54:10,381 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:10,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:10,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:54:10,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633033743] [2021-03-10 21:54:10,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:54:10,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:10,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:54:10,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:54:10,382 INFO L87 Difference]: Start difference. First operand 1265 states and 4159 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:10,964 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-10 21:54:11,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:11,586 INFO L93 Difference]: Finished difference Result 1471 states and 4688 transitions. [2021-03-10 21:54:11,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:54:11,587 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:54:11,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:11,589 INFO L225 Difference]: With dead ends: 1471 [2021-03-10 21:54:11,589 INFO L226 Difference]: Without dead ends: 1383 [2021-03-10 21:54:11,589 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1169.4ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:54:11,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2021-03-10 21:54:11,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1272. [2021-03-10 21:54:11,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1271 states have (on average 3.2997639653815893) internal successors, (4194), 1271 states have internal predecessors, (4194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:11,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 4194 transitions. [2021-03-10 21:54:11,602 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 4194 transitions. Word has length 24 [2021-03-10 21:54:11,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:11,602 INFO L480 AbstractCegarLoop]: Abstraction has 1272 states and 4194 transitions. [2021-03-10 21:54:11,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:11,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 4194 transitions. [2021-03-10 21:54:11,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:11,604 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:11,604 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:11,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1113,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:11,807 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:11,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:11,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1389401086, now seen corresponding path program 141 times [2021-03-10 21:54:11,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:11,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715398470] [2021-03-10 21:54:11,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:54:12,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715398470] [2021-03-10 21:54:12,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905570471] [2021-03-10 21:54:12,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:12,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:54:12,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:12,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:54:12,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:12,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:12,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:12,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:12,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:12,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:12,320 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:12,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:12,325 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:12,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:12,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:54:12,405 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-03-10 21:54:12,579 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-03-10 21:54:12,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:12,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:12,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:12,593 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:12,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:12,600 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:12,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:12,607 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:12,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:12,614 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:12,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:12,620 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:12,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:12,627 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:12,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:12,633 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:12,915 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-03-10 21:54:12,916 INFO L628 ElimStorePlain]: treesize reduction 177, result has 51.0 percent of original size [2021-03-10 21:54:12,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:54:12,924 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:12,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:12,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:54:12,931 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:13,046 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 21:54:13,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:13,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:54:13,050 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:409, output treesize:96 [2021-03-10 21:54:13,276 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:54:13,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:13,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:54:13,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283375920] [2021-03-10 21:54:13,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:13,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:13,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:13,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:13,277 INFO L87 Difference]: Start difference. First operand 1272 states and 4194 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:13,937 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-10 21:54:14,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:14,035 INFO L93 Difference]: Finished difference Result 1513 states and 4800 transitions. [2021-03-10 21:54:14,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:54:14,036 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:54:14,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:14,039 INFO L225 Difference]: With dead ends: 1513 [2021-03-10 21:54:14,039 INFO L226 Difference]: Without dead ends: 1426 [2021-03-10 21:54:14,039 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 920.9ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:54:14,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2021-03-10 21:54:14,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1265. [2021-03-10 21:54:14,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.2903481012658227) internal successors, (4159), 1264 states have internal predecessors, (4159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:14,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4159 transitions. [2021-03-10 21:54:14,052 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4159 transitions. Word has length 24 [2021-03-10 21:54:14,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:14,053 INFO L480 AbstractCegarLoop]: Abstraction has 1265 states and 4159 transitions. [2021-03-10 21:54:14,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:14,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4159 transitions. [2021-03-10 21:54:14,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:14,054 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:14,054 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:14,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1124 [2021-03-10 21:54:14,254 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:14,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:14,255 INFO L82 PathProgramCache]: Analyzing trace with hash 324643820, now seen corresponding path program 142 times [2021-03-10 21:54:14,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:14,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319612975] [2021-03-10 21:54:14,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:14,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319612975] [2021-03-10 21:54:14,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145671513] [2021-03-10 21:54:14,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:14,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:54:14,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:14,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:54:14,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:14,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:14,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:14,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:14,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:14,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:14,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:14,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:14,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:14,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:14,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:14,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:14,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:14,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:14,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:14,660 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:14,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:14,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:54:14,763 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:197, output treesize:169 [2021-03-10 21:54:15,054 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-03-10 21:54:15,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:15,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:15,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-03-10 21:54:15,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:15,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:15,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:15,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:15,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:15,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:15,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:15,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:54:15,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:15,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:15,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:15,078 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:15,240 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-03-10 21:54:15,240 INFO L628 ElimStorePlain]: treesize reduction 63, result has 62.5 percent of original size [2021-03-10 21:54:15,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:15,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:15,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:15,248 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:15,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:15,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:54:15,254 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:15,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:15,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:54:15,322 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:201, output treesize:47 [2021-03-10 21:54:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:15,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:15,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:54:15,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916532072] [2021-03-10 21:54:15,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:15,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:15,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:15,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:15,452 INFO L87 Difference]: Start difference. First operand 1265 states and 4159 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:15,841 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 35 [2021-03-10 21:54:16,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:16,148 INFO L93 Difference]: Finished difference Result 1373 states and 4467 transitions. [2021-03-10 21:54:16,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:54:16,149 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:54:16,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:16,151 INFO L225 Difference]: With dead ends: 1373 [2021-03-10 21:54:16,151 INFO L226 Difference]: Without dead ends: 1320 [2021-03-10 21:54:16,151 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 746.3ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:54:16,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-03-10 21:54:16,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1268. [2021-03-10 21:54:16,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1267 states have (on average 3.2904498816101024) internal successors, (4169), 1267 states have internal predecessors, (4169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:16,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 4169 transitions. [2021-03-10 21:54:16,165 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 4169 transitions. Word has length 24 [2021-03-10 21:54:16,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:16,165 INFO L480 AbstractCegarLoop]: Abstraction has 1268 states and 4169 transitions. [2021-03-10 21:54:16,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:16,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 4169 transitions. [2021-03-10 21:54:16,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:16,166 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:16,167 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:16,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1132 [2021-03-10 21:54:16,367 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:16,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:16,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1643686646, now seen corresponding path program 143 times [2021-03-10 21:54:16,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:16,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81511770] [2021-03-10 21:54:16,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:16,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81511770] [2021-03-10 21:54:16,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644789167] [2021-03-10 21:54:16,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:16,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:54:16,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:16,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:54:16,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:16,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:16,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:16,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:16,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:16,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:16,797 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:16,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:16,802 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:16,914 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 21:54:16,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:16,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:54:16,918 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:197, output treesize:169 [2021-03-10 21:54:17,149 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_0]} [2021-03-10 21:54:17,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:17,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:17,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:17,164 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:17,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:17,171 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:17,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:17,178 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:17,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:17,185 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:17,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:17,192 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:17,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:17,199 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:17,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:17,205 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:17,505 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-03-10 21:54:17,506 INFO L628 ElimStorePlain]: treesize reduction 175, result has 51.3 percent of original size [2021-03-10 21:54:17,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:54:17,515 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:17,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:54:17,522 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:17,640 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 21:54:17,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:17,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:54:17,644 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:409, output treesize:96 [2021-03-10 21:54:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:17,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:17,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:54:17,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379643784] [2021-03-10 21:54:17,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:54:17,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:17,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:54:17,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:54:17,864 INFO L87 Difference]: Start difference. First operand 1268 states and 4169 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:18,464 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 21:54:18,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:18,768 INFO L93 Difference]: Finished difference Result 1480 states and 4737 transitions. [2021-03-10 21:54:18,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:54:18,769 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:54:18,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:18,771 INFO L225 Difference]: With dead ends: 1480 [2021-03-10 21:54:18,771 INFO L226 Difference]: Without dead ends: 1384 [2021-03-10 21:54:18,771 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1003.0ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:54:18,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-03-10 21:54:18,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1277. [2021-03-10 21:54:18,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 1276 states have (on average 3.29858934169279) internal successors, (4209), 1276 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:18,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 4209 transitions. [2021-03-10 21:54:18,785 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 4209 transitions. Word has length 24 [2021-03-10 21:54:18,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:18,786 INFO L480 AbstractCegarLoop]: Abstraction has 1277 states and 4209 transitions. [2021-03-10 21:54:18,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:18,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 4209 transitions. [2021-03-10 21:54:18,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:18,787 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:18,787 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:19,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1138,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:19,002 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:19,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:19,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1771007114, now seen corresponding path program 144 times [2021-03-10 21:54:19,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:19,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57289783] [2021-03-10 21:54:19,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:54:19,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57289783] [2021-03-10 21:54:19,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044014597] [2021-03-10 21:54:19,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:19,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:54:19,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:19,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:54:19,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:19,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:19,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:19,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:19,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:19,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:19,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:19,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:19,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:19,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:19,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:19,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:19,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:19,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:19,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:19,534 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:19,638 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 21:54:19,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:19,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:54:19,641 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:197, output treesize:169 [2021-03-10 21:54:19,840 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_0]} [2021-03-10 21:54:19,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:19,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:19,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:19,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:19,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:19,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:19,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:19,854 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:19,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:19,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:19,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:19,861 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:19,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:19,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:19,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:19,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:19,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:19,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:19,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:19,876 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:19,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:19,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:19,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:19,883 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:19,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:19,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:19,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:19,890 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:19,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:19,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:19,898 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:20,212 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-03-10 21:54:20,213 INFO L628 ElimStorePlain]: treesize reduction 167, result has 53.5 percent of original size [2021-03-10 21:54:20,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:20,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:20,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:54:20,222 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:20,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:20,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:20,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:20,231 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:20,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:20,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:54:20,238 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:20,374 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 21:54:20,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:20,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:54:20,378 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:409, output treesize:96 [2021-03-10 21:54:20,622 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:54:20,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:20,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:54:20,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133785269] [2021-03-10 21:54:20,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:20,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:20,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:20,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:20,623 INFO L87 Difference]: Start difference. First operand 1277 states and 4209 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:21,080 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-03-10 21:54:21,394 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2021-03-10 21:54:21,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:21,580 INFO L93 Difference]: Finished difference Result 1572 states and 4966 transitions. [2021-03-10 21:54:21,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:54:21,581 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:54:21,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:21,584 INFO L225 Difference]: With dead ends: 1572 [2021-03-10 21:54:21,584 INFO L226 Difference]: Without dead ends: 1458 [2021-03-10 21:54:21,584 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1183.7ms TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:54:21,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2021-03-10 21:54:21,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1267. [2021-03-10 21:54:21,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 3.29304897314376) internal successors, (4169), 1266 states have internal predecessors, (4169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:21,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 4169 transitions. [2021-03-10 21:54:21,600 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 4169 transitions. Word has length 24 [2021-03-10 21:54:21,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:21,600 INFO L480 AbstractCegarLoop]: Abstraction has 1267 states and 4169 transitions. [2021-03-10 21:54:21,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:21,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 4169 transitions. [2021-03-10 21:54:21,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:21,602 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:21,602 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:21,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-03-10 21:54:21,803 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:21,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:21,803 INFO L82 PathProgramCache]: Analyzing trace with hash 545296860, now seen corresponding path program 145 times [2021-03-10 21:54:21,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:21,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548942739] [2021-03-10 21:54:21,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:22,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548942739] [2021-03-10 21:54:22,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373900] [2021-03-10 21:54:22,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:22,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:54:22,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:22,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:22,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:22,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:22,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:22,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:22,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:22,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:22,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:22,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:22,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:22,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:22,436 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:22,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:22,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:22,441 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:22,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:22,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:54:22,522 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:54:22,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:22,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:22,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:22,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:22,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:22,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:22,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:22,872 INFO L628 ElimStorePlain]: treesize reduction 40, result has 43.7 percent of original size [2021-03-10 21:54:22,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:22,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:22,878 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:22,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:22,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:54:22,892 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:85, output treesize:12 [2021-03-10 21:54:22,948 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:22,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:22,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:54:22,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701164379] [2021-03-10 21:54:22,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:22,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:22,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:22,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:22,949 INFO L87 Difference]: Start difference. First operand 1267 states and 4169 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:23,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:23,601 INFO L93 Difference]: Finished difference Result 1473 states and 4710 transitions. [2021-03-10 21:54:23,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:54:23,602 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:54:23,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:23,605 INFO L225 Difference]: With dead ends: 1473 [2021-03-10 21:54:23,605 INFO L226 Difference]: Without dead ends: 1359 [2021-03-10 21:54:23,605 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 928.9ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:54:23,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-03-10 21:54:23,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1303. [2021-03-10 21:54:23,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 3.2903225806451615) internal successors, (4284), 1302 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:23,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4284 transitions. [2021-03-10 21:54:23,620 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4284 transitions. Word has length 24 [2021-03-10 21:54:23,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:23,620 INFO L480 AbstractCegarLoop]: Abstraction has 1303 states and 4284 transitions. [2021-03-10 21:54:23,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:23,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4284 transitions. [2021-03-10 21:54:23,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:23,621 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:23,621 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:23,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1160,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:23,822 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:23,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:23,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1192674956, now seen corresponding path program 146 times [2021-03-10 21:54:23,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:23,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498754949] [2021-03-10 21:54:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:24,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498754949] [2021-03-10 21:54:24,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125946548] [2021-03-10 21:54:24,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:24,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:54:24,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:24,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:54:24,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:24,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:24,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:24,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:24,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:24,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:24,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:24,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:24,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:24,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:54:24,321 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-03-10 21:54:24,489 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-03-10 21:54:24,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:24,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:24,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:24,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:24,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:24,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:24,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:24,502 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:24,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:24,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:24,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:24,508 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:24,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:24,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:24,513 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:24,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:24,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:24,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:24,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:54:24,597 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:24,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:24,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:24,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:54:24,604 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:24,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:24,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:24,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:54:24,611 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:24,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:24,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:54:24,617 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:24,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:24,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:54:24,686 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:161, output treesize:57 [2021-03-10 21:54:24,836 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:24,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:24,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:54:24,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370628294] [2021-03-10 21:54:24,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:24,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:24,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:24,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:24,837 INFO L87 Difference]: Start difference. First operand 1303 states and 4284 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:25,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:25,662 INFO L93 Difference]: Finished difference Result 1690 states and 5275 transitions. [2021-03-10 21:54:25,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:54:25,663 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:54:25,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:25,666 INFO L225 Difference]: With dead ends: 1690 [2021-03-10 21:54:25,666 INFO L226 Difference]: Without dead ends: 1573 [2021-03-10 21:54:25,666 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 864.0ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:54:25,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2021-03-10 21:54:25,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 1311. [2021-03-10 21:54:25,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1310 states have (on average 3.2931297709923664) internal successors, (4314), 1310 states have internal predecessors, (4314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:25,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 4314 transitions. [2021-03-10 21:54:25,682 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 4314 transitions. Word has length 24 [2021-03-10 21:54:25,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:25,682 INFO L480 AbstractCegarLoop]: Abstraction has 1311 states and 4314 transitions. [2021-03-10 21:54:25,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:25,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 4314 transitions. [2021-03-10 21:54:25,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:25,684 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:25,684 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:25,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1167 [2021-03-10 21:54:25,884 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:25,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:25,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1686428742, now seen corresponding path program 147 times [2021-03-10 21:54:25,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:25,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201727446] [2021-03-10 21:54:25,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:26,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201727446] [2021-03-10 21:54:26,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925438318] [2021-03-10 21:54:26,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:26,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:54:26,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:26,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:54:26,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:26,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:26,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:26,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:26,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:26,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:26,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:26,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:26,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:26,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:26,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:26,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:26,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:26,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:26,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:26,387 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:26,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:26,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:54:26,464 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:54:26,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:26,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:54:26,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:26,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:26,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:26,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:26,714 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:26,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:26,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:54:26,726 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:11 [2021-03-10 21:54:26,795 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:26,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:26,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:54:26,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894186462] [2021-03-10 21:54:26,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:26,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:26,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:26,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:26,796 INFO L87 Difference]: Start difference. First operand 1311 states and 4314 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:27,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:27,442 INFO L93 Difference]: Finished difference Result 1564 states and 4976 transitions. [2021-03-10 21:54:27,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:54:27,443 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:54:27,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:27,445 INFO L225 Difference]: With dead ends: 1564 [2021-03-10 21:54:27,445 INFO L226 Difference]: Without dead ends: 1466 [2021-03-10 21:54:27,446 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 685.1ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:54:27,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2021-03-10 21:54:27,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 1300. [2021-03-10 21:54:27,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 3.2933025404157044) internal successors, (4278), 1299 states have internal predecessors, (4278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:27,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 4278 transitions. [2021-03-10 21:54:27,461 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 4278 transitions. Word has length 24 [2021-03-10 21:54:27,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:27,461 INFO L480 AbstractCegarLoop]: Abstraction has 1300 states and 4278 transitions. [2021-03-10 21:54:27,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:27,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 4278 transitions. [2021-03-10 21:54:27,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:27,463 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:27,463 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:27,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1177 [2021-03-10 21:54:27,663 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:27,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:27,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1287951836, now seen corresponding path program 148 times [2021-03-10 21:54:27,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:27,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210686840] [2021-03-10 21:54:27,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:28,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210686840] [2021-03-10 21:54:28,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992810037] [2021-03-10 21:54:28,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:28,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:54:28,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:28,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:54:28,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:28,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:28,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:28,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:28,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:28,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:28,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:28,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:28,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:28,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:28,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:28,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:28,346 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:28,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:28,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:28,351 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:28,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:28,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:54:28,430 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:54:28,690 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-03-10 21:54:28,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:28,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:28,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:28,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:28,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:28,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:28,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:28,703 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:28,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:28,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:28,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:28,709 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:28,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:28,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:28,714 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:28,822 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-10 21:54:28,822 INFO L628 ElimStorePlain]: treesize reduction 87, result has 46.0 percent of original size [2021-03-10 21:54:28,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:28,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:28,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:54:28,829 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:28,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:28,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:54:28,836 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:28,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:28,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:54:28,880 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:185, output treesize:34 [2021-03-10 21:54:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:28,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:28,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:54:28,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143344940] [2021-03-10 21:54:28,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:28,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:28,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:28,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:28,992 INFO L87 Difference]: Start difference. First operand 1300 states and 4278 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:29,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:29,902 INFO L93 Difference]: Finished difference Result 1755 states and 5449 transitions. [2021-03-10 21:54:29,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:54:29,903 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:54:29,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:29,906 INFO L225 Difference]: With dead ends: 1755 [2021-03-10 21:54:29,906 INFO L226 Difference]: Without dead ends: 1571 [2021-03-10 21:54:29,906 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1000.8ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:54:29,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2021-03-10 21:54:29,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 1317. [2021-03-10 21:54:29,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1316 states have (on average 3.3031914893617023) internal successors, (4347), 1316 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:29,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 4347 transitions. [2021-03-10 21:54:29,922 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 4347 transitions. Word has length 24 [2021-03-10 21:54:29,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:29,922 INFO L480 AbstractCegarLoop]: Abstraction has 1317 states and 4347 transitions. [2021-03-10 21:54:29,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:29,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 4347 transitions. [2021-03-10 21:54:29,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:29,924 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:29,924 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:30,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1183,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:30,125 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:30,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:30,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1114059666, now seen corresponding path program 149 times [2021-03-10 21:54:30,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:30,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659319471] [2021-03-10 21:54:30,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:30,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659319471] [2021-03-10 21:54:30,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7090441] [2021-03-10 21:54:30,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:30,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:54:30,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:30,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:54:30,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:30,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:30,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:30,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:30,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:30,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:30,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:30,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:30,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:30,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:30,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:30,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:30,737 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:30,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:30,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:30,743 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:30,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:30,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:54:30,824 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:54:30,982 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-03-10 21:54:30,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:30,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:30,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:30,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:30,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:30,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:30,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:30,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:31,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:31,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:31,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:31,004 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:31,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:31,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:31,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:31,011 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:31,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:31,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:31,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:31,019 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:31,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:31,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:31,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:31,026 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:31,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:31,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:31,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:31,033 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:31,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:31,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:31,040 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:31,330 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-03-10 21:54:31,331 INFO L628 ElimStorePlain]: treesize reduction 159, result has 52.8 percent of original size [2021-03-10 21:54:31,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:31,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:31,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:54:31,339 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:31,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:31,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:31,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:54:31,347 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:31,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:31,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:54:31,355 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:31,463 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 21:54:31,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:31,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:54:31,466 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:385, output treesize:96 [2021-03-10 21:54:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:31,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:31,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:54:31,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217460767] [2021-03-10 21:54:31,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:54:31,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:31,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:54:31,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:54:31,699 INFO L87 Difference]: Start difference. First operand 1317 states and 4347 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:32,271 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 21:54:32,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:32,574 INFO L93 Difference]: Finished difference Result 1668 states and 5284 transitions. [2021-03-10 21:54:32,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:54:32,575 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:54:32,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:32,577 INFO L225 Difference]: With dead ends: 1668 [2021-03-10 21:54:32,577 INFO L226 Difference]: Without dead ends: 1580 [2021-03-10 21:54:32,577 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1005.6ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:54:32,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2021-03-10 21:54:32,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1324. [2021-03-10 21:54:32,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.312169312169312) internal successors, (4382), 1323 states have internal predecessors, (4382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:32,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 4382 transitions. [2021-03-10 21:54:32,594 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 4382 transitions. Word has length 24 [2021-03-10 21:54:32,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:32,594 INFO L480 AbstractCegarLoop]: Abstraction has 1324 states and 4382 transitions. [2021-03-10 21:54:32,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:32,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 4382 transitions. [2021-03-10 21:54:32,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:32,596 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:32,596 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:32,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1191 [2021-03-10 21:54:32,796 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:32,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:32,796 INFO L82 PathProgramCache]: Analyzing trace with hash 233786130, now seen corresponding path program 150 times [2021-03-10 21:54:32,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:32,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353034511] [2021-03-10 21:54:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:54:33,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353034511] [2021-03-10 21:54:33,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710864718] [2021-03-10 21:54:33,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:33,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:54:33,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:33,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:54:33,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:33,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:33,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:33,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:33,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:33,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:33,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:33,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:33,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:33,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:33,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:33,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:33,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:33,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:33,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:33,379 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:33,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:33,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:54:33,457 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:54:33,621 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-03-10 21:54:33,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:33,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:33,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:33,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:33,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:33,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:33,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:33,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:33,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:33,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:33,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:33,640 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:33,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:33,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:33,646 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:33,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:33,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:33,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:33,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:54:33,732 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:33,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:33,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:33,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:54:33,739 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:33,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:33,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:33,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:54:33,746 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:33,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:33,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:54:33,753 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:33,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:33,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:54:33,829 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:173, output treesize:69 [2021-03-10 21:54:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:54:34,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:34,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:54:34,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956135452] [2021-03-10 21:54:34,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:34,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:34,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:34,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:34,016 INFO L87 Difference]: Start difference. First operand 1324 states and 4382 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:34,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:34,676 INFO L93 Difference]: Finished difference Result 1719 states and 5412 transitions. [2021-03-10 21:54:34,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:54:34,677 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:54:34,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:34,680 INFO L225 Difference]: With dead ends: 1719 [2021-03-10 21:54:34,680 INFO L226 Difference]: Without dead ends: 1681 [2021-03-10 21:54:34,680 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 763.3ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:54:34,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1681 states. [2021-03-10 21:54:34,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1681 to 1324. [2021-03-10 21:54:34,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.312925170068027) internal successors, (4383), 1323 states have internal predecessors, (4383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:34,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 4383 transitions. [2021-03-10 21:54:34,697 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 4383 transitions. Word has length 24 [2021-03-10 21:54:34,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:34,697 INFO L480 AbstractCegarLoop]: Abstraction has 1324 states and 4383 transitions. [2021-03-10 21:54:34,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:34,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 4383 transitions. [2021-03-10 21:54:34,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:34,699 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:34,699 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:34,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1199 [2021-03-10 21:54:34,899 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:34,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:34,900 INFO L82 PathProgramCache]: Analyzing trace with hash 582689450, now seen corresponding path program 151 times [2021-03-10 21:54:34,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:34,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817796865] [2021-03-10 21:54:34,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:34,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:35,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817796865] [2021-03-10 21:54:35,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196013097] [2021-03-10 21:54:35,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:35,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:54:35,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:35,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:35,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:35,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:35,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:35,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:35,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:35,294 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:35,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:35,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:54:35,340 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-03-10 21:54:35,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:35,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:35,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:54:35,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:35,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:35,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:54:35,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:35,537 INFO L628 ElimStorePlain]: treesize reduction 46, result has 44.6 percent of original size [2021-03-10 21:54:35,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:35,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:54:35,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:35,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:35,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:54:35,556 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:93, output treesize:12 [2021-03-10 21:54:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:35,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:35,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:54:35,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459976011] [2021-03-10 21:54:35,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:35,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:35,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:35,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:35,632 INFO L87 Difference]: Start difference. First operand 1324 states and 4383 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:36,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:36,126 INFO L93 Difference]: Finished difference Result 1472 states and 4761 transitions. [2021-03-10 21:54:36,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:54:36,127 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:54:36,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:36,129 INFO L225 Difference]: With dead ends: 1472 [2021-03-10 21:54:36,129 INFO L226 Difference]: Without dead ends: 1369 [2021-03-10 21:54:36,130 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 506.3ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:54:36,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-03-10 21:54:36,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1319. [2021-03-10 21:54:36,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1318 states have (on average 3.3080424886191198) internal successors, (4360), 1318 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:36,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 4360 transitions. [2021-03-10 21:54:36,145 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 4360 transitions. Word has length 24 [2021-03-10 21:54:36,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:36,145 INFO L480 AbstractCegarLoop]: Abstraction has 1319 states and 4360 transitions. [2021-03-10 21:54:36,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:36,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 4360 transitions. [2021-03-10 21:54:36,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:36,146 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:36,146 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:36,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1207 [2021-03-10 21:54:36,347 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:36,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:36,347 INFO L82 PathProgramCache]: Analyzing trace with hash 170210378, now seen corresponding path program 152 times [2021-03-10 21:54:36,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:36,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099624865] [2021-03-10 21:54:36,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:36,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099624865] [2021-03-10 21:54:36,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414655403] [2021-03-10 21:54:36,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:36,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:54:36,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:36,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:54:36,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:36,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:36,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:36,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:36,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:36,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:36,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2021-03-10 21:54:36,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:36,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:36,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:36,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:36,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:36,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:36,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:36,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:36,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:36,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:36,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:36,841 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:36,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:36,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:36,847 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:36,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:36,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:54:36,886 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:31 [2021-03-10 21:54:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:37,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:37,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:54:37,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011165215] [2021-03-10 21:54:37,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:54:37,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:37,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:54:37,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:54:37,011 INFO L87 Difference]: Start difference. First operand 1319 states and 4360 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:37,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:37,609 INFO L93 Difference]: Finished difference Result 1429 states and 4674 transitions. [2021-03-10 21:54:37,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:54:37,609 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:54:37,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:37,612 INFO L225 Difference]: With dead ends: 1429 [2021-03-10 21:54:37,612 INFO L226 Difference]: Without dead ends: 1388 [2021-03-10 21:54:37,612 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 607.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:54:37,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-03-10 21:54:37,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1319. [2021-03-10 21:54:37,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1318 states have (on average 3.3019726858877085) internal successors, (4352), 1318 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:37,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 4352 transitions. [2021-03-10 21:54:37,627 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 4352 transitions. Word has length 24 [2021-03-10 21:54:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:37,627 INFO L480 AbstractCegarLoop]: Abstraction has 1319 states and 4352 transitions. [2021-03-10 21:54:37,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:37,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 4352 transitions. [2021-03-10 21:54:37,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:37,628 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:37,628 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:37,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1211 [2021-03-10 21:54:37,829 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:37,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:37,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1617414260, now seen corresponding path program 153 times [2021-03-10 21:54:37,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:37,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571700484] [2021-03-10 21:54:37,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:38,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571700484] [2021-03-10 21:54:38,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081914079] [2021-03-10 21:54:38,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:38,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:54:38,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:38,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:54:38,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:38,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:38,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:38,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:38,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:38,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:38,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:54:38,329 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-03-10 21:54:38,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:38,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:38,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:38,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:38,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:38,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:38,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:38,529 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 21:54:38,529 INFO L628 ElimStorePlain]: treesize reduction 94, result has 40.9 percent of original size [2021-03-10 21:54:38,529 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:54:38,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:38,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:38,534 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:38,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:38,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:38,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:38,579 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:38,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:38,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:54:38,616 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:173, output treesize:34 [2021-03-10 21:54:38,726 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:38,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:38,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:54:38,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422613751] [2021-03-10 21:54:38,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:38,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:38,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:38,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:38,727 INFO L87 Difference]: Start difference. First operand 1319 states and 4352 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:39,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:39,275 INFO L93 Difference]: Finished difference Result 1564 states and 5045 transitions. [2021-03-10 21:54:39,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:54:39,276 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:54:39,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:39,279 INFO L225 Difference]: With dead ends: 1564 [2021-03-10 21:54:39,279 INFO L226 Difference]: Without dead ends: 1473 [2021-03-10 21:54:39,279 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 697.8ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:54:39,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2021-03-10 21:54:39,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1319. [2021-03-10 21:54:39,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1318 states have (on average 3.3019726858877085) internal successors, (4352), 1318 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:39,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 4352 transitions. [2021-03-10 21:54:39,306 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 4352 transitions. Word has length 24 [2021-03-10 21:54:39,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:39,306 INFO L480 AbstractCegarLoop]: Abstraction has 1319 states and 4352 transitions. [2021-03-10 21:54:39,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:39,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 4352 transitions. [2021-03-10 21:54:39,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:39,308 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:39,308 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:39,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1215,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:39,508 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:39,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:39,509 INFO L82 PathProgramCache]: Analyzing trace with hash -2046348534, now seen corresponding path program 154 times [2021-03-10 21:54:39,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:39,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221838986] [2021-03-10 21:54:39,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:39,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:39,751 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:39,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221838986] [2021-03-10 21:54:39,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695788760] [2021-03-10 21:54:39,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:39,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:54:39,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:39,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:54:39,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:39,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:39,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:39,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:39,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:39,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:39,879 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:39,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:39,884 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:39,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:39,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:54:39,956 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-03-10 21:54:40,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:40,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:40,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:40,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:40,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:40,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:40,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:40,414 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-03-10 21:54:40,415 INFO L628 ElimStorePlain]: treesize reduction 155, result has 55.3 percent of original size [2021-03-10 21:54:40,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:54:40,421 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:40,549 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-10 21:54:40,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:40,550 INFO L518 ElimStorePlain]: Eliminatee v_prenex_639 vanished before elimination [2021-03-10 21:54:40,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:40,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:40,557 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:40,683 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 21:54:40,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:40,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:40,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:40,690 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:40,822 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 21:54:40,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:40,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:40,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:40,831 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:40,950 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 21:54:40,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:40,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:54:40,957 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:40,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:40,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:40,963 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:41,074 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 21:54:41,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:41,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:41,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:54:41,082 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:41,186 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 21:54:41,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:41,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:54:41,188 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-03-10 21:54:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:41,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:41,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:54:41,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530897622] [2021-03-10 21:54:41,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:54:41,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:41,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:54:41,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:54:41,433 INFO L87 Difference]: Start difference. First operand 1319 states and 4352 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:42,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:42,304 INFO L93 Difference]: Finished difference Result 1689 states and 5392 transitions. [2021-03-10 21:54:42,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:54:42,305 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:54:42,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:42,308 INFO L225 Difference]: With dead ends: 1689 [2021-03-10 21:54:42,308 INFO L226 Difference]: Without dead ends: 1609 [2021-03-10 21:54:42,308 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 828.5ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:54:42,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-03-10 21:54:42,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1333. [2021-03-10 21:54:42,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1332 states have (on average 3.31006006006006) internal successors, (4409), 1332 states have internal predecessors, (4409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:42,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 4409 transitions. [2021-03-10 21:54:42,325 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 4409 transitions. Word has length 24 [2021-03-10 21:54:42,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:42,325 INFO L480 AbstractCegarLoop]: Abstraction has 1333 states and 4409 transitions. [2021-03-10 21:54:42,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:42,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 4409 transitions. [2021-03-10 21:54:42,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:42,327 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:42,327 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:42,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1220 [2021-03-10 21:54:42,527 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:42,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:42,527 INFO L82 PathProgramCache]: Analyzing trace with hash -95261484, now seen corresponding path program 155 times [2021-03-10 21:54:42,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:42,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107577874] [2021-03-10 21:54:42,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:42,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107577874] [2021-03-10 21:54:42,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993545312] [2021-03-10 21:54:42,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:42,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:54:42,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:42,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:54:42,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:42,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:42,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:42,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:42,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:42,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:42,916 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:42,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:42,921 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:42,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:42,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:54:42,998 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-03-10 21:54:43,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:43,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:43,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:43,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:43,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:43,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:43,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:43,503 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-03-10 21:54:43,503 INFO L628 ElimStorePlain]: treesize reduction 157, result has 54.8 percent of original size [2021-03-10 21:54:43,503 INFO L518 ElimStorePlain]: Eliminatee v_prenex_648 vanished before elimination [2021-03-10 21:54:43,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:43,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:43,510 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:43,649 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-10 21:54:43,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:43,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:43,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:43,656 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:43,781 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-10 21:54:43,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:43,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:43,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:43,789 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:43,917 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 21:54:43,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:43,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:43,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:43,925 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:44,045 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 21:54:44,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:44,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:44,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:44,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:44,053 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:44,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:54:44,059 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:44,172 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 21:54:44,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:44,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:44,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:54:44,180 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:44,286 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 21:54:44,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:44,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:54:44,288 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-03-10 21:54:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:44,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:44,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:54:44,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261812599] [2021-03-10 21:54:44,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:44,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:44,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:44,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:44,531 INFO L87 Difference]: Start difference. First operand 1333 states and 4409 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:45,088 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-10 21:54:45,244 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 21:54:45,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:45,528 INFO L93 Difference]: Finished difference Result 1681 states and 5340 transitions. [2021-03-10 21:54:45,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:54:45,529 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:54:45,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:45,532 INFO L225 Difference]: With dead ends: 1681 [2021-03-10 21:54:45,533 INFO L226 Difference]: Without dead ends: 1604 [2021-03-10 21:54:45,533 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1053.2ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:54:45,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-03-10 21:54:45,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1341. [2021-03-10 21:54:45,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 3.3082089552238805) internal successors, (4433), 1340 states have internal predecessors, (4433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:45,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 4433 transitions. [2021-03-10 21:54:45,549 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 4433 transitions. Word has length 24 [2021-03-10 21:54:45,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:45,549 INFO L480 AbstractCegarLoop]: Abstraction has 1341 states and 4433 transitions. [2021-03-10 21:54:45,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:45,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 4433 transitions. [2021-03-10 21:54:45,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:45,550 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:45,551 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:45,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1227,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:45,751 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:45,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:45,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1272144164, now seen corresponding path program 156 times [2021-03-10 21:54:45,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:45,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605075069] [2021-03-10 21:54:45,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:46,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605075069] [2021-03-10 21:54:46,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204743084] [2021-03-10 21:54:46,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:46,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:54:46,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:46,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:54:46,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:46,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:46,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:46,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:46,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:46,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:46,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:54:46,188 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-03-10 21:54:46,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:46,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:46,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:46,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:46,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:46,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:46,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:46,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:46,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:46,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:46,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:46,345 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:46,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:46,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:46,351 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:46,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:46,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:54:46,388 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:31 [2021-03-10 21:54:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:46,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:46,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:54:46,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003710104] [2021-03-10 21:54:46,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:54:46,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:46,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:54:46,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:54:46,519 INFO L87 Difference]: Start difference. First operand 1341 states and 4433 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:47,109 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-03-10 21:54:47,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:47,419 INFO L93 Difference]: Finished difference Result 1572 states and 5097 transitions. [2021-03-10 21:54:47,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:54:47,420 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:54:47,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:47,422 INFO L225 Difference]: With dead ends: 1572 [2021-03-10 21:54:47,422 INFO L226 Difference]: Without dead ends: 1513 [2021-03-10 21:54:47,422 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 820.7ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:54:47,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-03-10 21:54:47,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1328. [2021-03-10 21:54:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 3.3074604370761116) internal successors, (4389), 1327 states have internal predecessors, (4389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:47,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 4389 transitions. [2021-03-10 21:54:47,447 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 4389 transitions. Word has length 24 [2021-03-10 21:54:47,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:47,447 INFO L480 AbstractCegarLoop]: Abstraction has 1328 states and 4389 transitions. [2021-03-10 21:54:47,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:47,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 4389 transitions. [2021-03-10 21:54:47,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:47,448 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:47,448 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:47,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1234 [2021-03-10 21:54:47,649 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:47,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:47,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1136237428, now seen corresponding path program 157 times [2021-03-10 21:54:47,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:47,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649575672] [2021-03-10 21:54:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:47,989 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:47,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649575672] [2021-03-10 21:54:47,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111026114] [2021-03-10 21:54:47,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:48,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:54:48,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:48,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:48,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:48,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:48,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:48,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:48,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:48,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:48,307 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 21:54:48,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:48,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:48,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:48,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:48,314 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:48,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:48,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:48,321 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:48,444 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 21:54:48,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:48,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:54:48,450 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-03-10 21:54:48,724 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-03-10 21:54:48,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:48,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:48,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-03-10 21:54:48,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:48,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:48,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:48,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:54:48,738 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:48,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:48,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:48,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:54:48,745 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:48,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:48,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-03-10 21:54:48,751 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:48,927 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-10 21:54:48,928 INFO L628 ElimStorePlain]: treesize reduction 58, result has 65.7 percent of original size [2021-03-10 21:54:48,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:48,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:48,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:54:48,936 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:48,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:48,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:48,943 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:49,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:49,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:54:49,018 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:221, output treesize:50 [2021-03-10 21:54:49,166 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:49,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:49,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:54:49,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252038907] [2021-03-10 21:54:49,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:49,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:49,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:49,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:49,167 INFO L87 Difference]: Start difference. First operand 1328 states and 4389 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:49,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:49,867 INFO L93 Difference]: Finished difference Result 1435 states and 4698 transitions. [2021-03-10 21:54:49,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:54:49,868 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:54:49,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:49,870 INFO L225 Difference]: With dead ends: 1435 [2021-03-10 21:54:49,870 INFO L226 Difference]: Without dead ends: 1382 [2021-03-10 21:54:49,871 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 822.2ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:54:49,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2021-03-10 21:54:49,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1334. [2021-03-10 21:54:49,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 3.3068267066766692) internal successors, (4408), 1333 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:49,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4408 transitions. [2021-03-10 21:54:49,886 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4408 transitions. Word has length 24 [2021-03-10 21:54:49,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:49,886 INFO L480 AbstractCegarLoop]: Abstraction has 1334 states and 4408 transitions. [2021-03-10 21:54:49,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:49,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4408 transitions. [2021-03-10 21:54:49,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:49,888 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:49,888 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:50,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1239,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:50,089 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:50,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:50,089 INFO L82 PathProgramCache]: Analyzing trace with hash -832093038, now seen corresponding path program 158 times [2021-03-10 21:54:50,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:50,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927637342] [2021-03-10 21:54:50,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:50,359 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-03-10 21:54:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:50,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927637342] [2021-03-10 21:54:50,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577688700] [2021-03-10 21:54:50,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:50,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:54:50,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:50,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:54:50,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:50,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:50,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:50,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:50,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:50,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:50,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:50,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:50,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:50,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:54:50,697 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:93, output treesize:79 [2021-03-10 21:54:50,825 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-03-10 21:54:50,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:50,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:50,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:50,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:50,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:50,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:50,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:50,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:50,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:50,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:50,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:50,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:50,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:50,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:50,852 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:50,968 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 21:54:50,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:50,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:50,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:50,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:50,977 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:50,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:50,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:50,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:54:50,985 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:50,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:50,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:50,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:54:50,993 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:50,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:50,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:54:51,001 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:51,107 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 21:54:51,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:51,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:54:51,110 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:75 [2021-03-10 21:54:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:51,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:51,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:54:51,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604012412] [2021-03-10 21:54:51,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:51,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:51,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:51,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:51,322 INFO L87 Difference]: Start difference. First operand 1334 states and 4408 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:51,679 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-03-10 21:54:52,373 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2021-03-10 21:54:52,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:52,379 INFO L93 Difference]: Finished difference Result 1533 states and 4910 transitions. [2021-03-10 21:54:52,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:54:52,380 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:54:52,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:52,383 INFO L225 Difference]: With dead ends: 1533 [2021-03-10 21:54:52,383 INFO L226 Difference]: Without dead ends: 1471 [2021-03-10 21:54:52,383 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1282.4ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:54:52,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2021-03-10 21:54:52,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1337. [2021-03-10 21:54:52,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 3.30688622754491) internal successors, (4418), 1336 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:52,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 4418 transitions. [2021-03-10 21:54:52,399 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 4418 transitions. Word has length 24 [2021-03-10 21:54:52,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:52,399 INFO L480 AbstractCegarLoop]: Abstraction has 1337 states and 4418 transitions. [2021-03-10 21:54:52,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:52,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 4418 transitions. [2021-03-10 21:54:52,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:52,401 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:52,401 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:52,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1247 [2021-03-10 21:54:52,601 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:52,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:52,602 INFO L82 PathProgramCache]: Analyzing trace with hash 977292628, now seen corresponding path program 159 times [2021-03-10 21:54:52,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:52,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015636112] [2021-03-10 21:54:52,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:52,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015636112] [2021-03-10 21:54:52,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033192872] [2021-03-10 21:54:52,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:52,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:54:52,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:52,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:54:52,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:53,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:53,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:53,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:53,024 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:53,164 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 21:54:53,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:53,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:53,172 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:53,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:53,179 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:53,308 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 21:54:53,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:53,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:54:53,313 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-03-10 21:54:53,572 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_0]} [2021-03-10 21:54:53,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:53,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:53,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:53,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:53,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:53,597 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:53,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:53,605 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:53,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:53,613 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:53,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:53,621 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:53,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:53,629 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:53,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:53,638 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:53,986 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-03-10 21:54:53,987 INFO L628 ElimStorePlain]: treesize reduction 173, result has 53.7 percent of original size [2021-03-10 21:54:53,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:53,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:54:53,996 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:54,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:54,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:54,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:54,005 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:54,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:54,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:54,013 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:54,149 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 21:54:54,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:54,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:54:54,153 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:425, output treesize:108 [2021-03-10 21:54:54,384 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:54,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:54,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:54:54,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290076634] [2021-03-10 21:54:54,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:54,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:54,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:54,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:54,384 INFO L87 Difference]: Start difference. First operand 1337 states and 4418 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:55,143 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-10 21:54:55,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:55,352 INFO L93 Difference]: Finished difference Result 1690 states and 5355 transitions. [2021-03-10 21:54:55,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:54:55,353 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:54:55,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:55,355 INFO L225 Difference]: With dead ends: 1690 [2021-03-10 21:54:55,355 INFO L226 Difference]: Without dead ends: 1556 [2021-03-10 21:54:55,356 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 970.5ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:54:55,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2021-03-10 21:54:55,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1340. [2021-03-10 21:54:55,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 3.3076923076923075) internal successors, (4429), 1339 states have internal predecessors, (4429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:55,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 4429 transitions. [2021-03-10 21:54:55,381 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 4429 transitions. Word has length 24 [2021-03-10 21:54:55,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:55,382 INFO L480 AbstractCegarLoop]: Abstraction has 1340 states and 4429 transitions. [2021-03-10 21:54:55,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:55,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 4429 transitions. [2021-03-10 21:54:55,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:55,383 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:55,383 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:55,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1257,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:55,584 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:55,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:55,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1437025154, now seen corresponding path program 160 times [2021-03-10 21:54:55,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:55,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218898] [2021-03-10 21:54:55,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:55,856 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-03-10 21:54:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:56,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218898] [2021-03-10 21:54:56,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218000905] [2021-03-10 21:54:56,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:56,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:54:56,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:56,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:54:56,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:56,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:56,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:56,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:56,154 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:56,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:56,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:56,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:56,164 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:56,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:56,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:54:56,243 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-03-10 21:54:56,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:56,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:56,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:56,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:56,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:56,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:56,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:56,736 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2021-03-10 21:54:56,736 INFO L628 ElimStorePlain]: treesize reduction 163, result has 53.0 percent of original size [2021-03-10 21:54:56,736 INFO L518 ElimStorePlain]: Eliminatee v_prenex_669 vanished before elimination [2021-03-10 21:54:56,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:56,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:56,743 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:56,873 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-10 21:54:56,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:56,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:56,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:56,881 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:57,006 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 21:54:57,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:57,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:54:57,013 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:57,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:57,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:57,020 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:57,138 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 21:54:57,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:57,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:57,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:54:57,146 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:57,259 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 21:54:57,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:57,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:54:57,266 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:57,374 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 21:54:57,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:57,375 INFO L518 ElimStorePlain]: Eliminatee v_prenex_667 vanished before elimination [2021-03-10 21:54:57,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:54:57,377 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-03-10 21:54:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:57,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:57,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:54:57,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103583022] [2021-03-10 21:54:57,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:57,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:57,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:57,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:57,647 INFO L87 Difference]: Start difference. First operand 1340 states and 4429 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:58,100 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-10 21:54:58,784 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-03-10 21:54:58,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:58,790 INFO L93 Difference]: Finished difference Result 1647 states and 5296 transitions. [2021-03-10 21:54:58,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:54:58,791 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:54:58,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:58,794 INFO L225 Difference]: With dead ends: 1647 [2021-03-10 21:54:58,794 INFO L226 Difference]: Without dead ends: 1567 [2021-03-10 21:54:58,795 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1325.5ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:54:58,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1567 states. [2021-03-10 21:54:58,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1567 to 1354. [2021-03-10 21:54:58,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1353 states have (on average 3.3155949741315593) internal successors, (4486), 1353 states have internal predecessors, (4486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:58,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 4486 transitions. [2021-03-10 21:54:58,811 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 4486 transitions. Word has length 24 [2021-03-10 21:54:58,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:58,811 INFO L480 AbstractCegarLoop]: Abstraction has 1354 states and 4486 transitions. [2021-03-10 21:54:58,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:58,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 4486 transitions. [2021-03-10 21:54:58,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:54:58,813 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:58,813 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:59,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1275 [2021-03-10 21:54:59,013 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:59,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:59,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1258351678, now seen corresponding path program 161 times [2021-03-10 21:54:59,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:59,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313897521] [2021-03-10 21:54:59,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:54:59,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313897521] [2021-03-10 21:54:59,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128357515] [2021-03-10 21:54:59,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:59,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:54:59,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:59,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:54:59,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:59,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:59,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:59,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:59,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:59,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:59,610 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:59,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:59,615 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:59,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:59,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:54:59,708 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-03-10 21:54:59,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:59,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:59,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:59,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:59,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:59,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:59,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:00,225 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-03-10 21:55:00,226 INFO L628 ElimStorePlain]: treesize reduction 155, result has 55.3 percent of original size [2021-03-10 21:55:00,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:55:00,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:00,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:00,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:55:00,242 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:00,378 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-10 21:55:00,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:00,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:00,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:55:00,388 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:00,520 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-10 21:55:00,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:00,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:00,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:55:00,534 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:00,661 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 21:55:00,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:00,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:55:00,668 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:00,790 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 21:55:00,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:00,791 INFO L518 ElimStorePlain]: Eliminatee v_prenex_676 vanished before elimination [2021-03-10 21:55:00,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:00,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:00,798 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:00,920 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 21:55:00,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:00,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:00,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:55:00,929 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:01,043 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 21:55:01,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:01,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:55:01,046 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-03-10 21:55:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:01,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:01,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:01,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706094021] [2021-03-10 21:55:01,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:01,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:01,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:01,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:01,302 INFO L87 Difference]: Start difference. First operand 1354 states and 4486 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:02,116 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-10 21:55:02,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:02,222 INFO L93 Difference]: Finished difference Result 1721 states and 5474 transitions. [2021-03-10 21:55:02,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:55:02,223 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:55:02,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:02,226 INFO L225 Difference]: With dead ends: 1721 [2021-03-10 21:55:02,226 INFO L226 Difference]: Without dead ends: 1630 [2021-03-10 21:55:02,226 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1073.7ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:55:02,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2021-03-10 21:55:02,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1353. [2021-03-10 21:55:02,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1352 states have (on average 3.3180473372781063) internal successors, (4486), 1352 states have internal predecessors, (4486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:02,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 4486 transitions. [2021-03-10 21:55:02,241 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 4486 transitions. Word has length 24 [2021-03-10 21:55:02,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:02,241 INFO L480 AbstractCegarLoop]: Abstraction has 1353 states and 4486 transitions. [2021-03-10 21:55:02,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:02,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 4486 transitions. [2021-03-10 21:55:02,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:55:02,243 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:02,243 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:02,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1282,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:02,444 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:02,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:02,444 INFO L82 PathProgramCache]: Analyzing trace with hash -2083737772, now seen corresponding path program 162 times [2021-03-10 21:55:02,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:02,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532223676] [2021-03-10 21:55:02,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:02,866 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:02,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532223676] [2021-03-10 21:55:02,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820049104] [2021-03-10 21:55:02,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:02,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:55:02,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:02,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:55:02,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:03,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:03,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:03,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:03,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:03,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:03,022 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:03,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:03,029 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:03,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:03,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:55:03,116 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-03-10 21:55:03,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:03,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:03,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:03,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:03,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:03,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:03,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:03,477 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 21:55:03,477 INFO L628 ElimStorePlain]: treesize reduction 94, result has 40.9 percent of original size [2021-03-10 21:55:03,478 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:55:03,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:03,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:03,483 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:03,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:03,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:03,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:55:03,535 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:03,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:03,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:55:03,577 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:173, output treesize:34 [2021-03-10 21:55:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:03,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:03,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:03,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311340534] [2021-03-10 21:55:03,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:03,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:03,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:03,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:03,740 INFO L87 Difference]: Start difference. First operand 1353 states and 4486 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:04,566 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 21:55:04,737 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-10 21:55:04,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:04,786 INFO L93 Difference]: Finished difference Result 1621 states and 5208 transitions. [2021-03-10 21:55:04,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:55:04,787 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:55:04,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:04,790 INFO L225 Difference]: With dead ends: 1621 [2021-03-10 21:55:04,790 INFO L226 Difference]: Without dead ends: 1505 [2021-03-10 21:55:04,790 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1132.4ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:55:04,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-03-10 21:55:04,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1341. [2021-03-10 21:55:04,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 3.3119402985074626) internal successors, (4438), 1340 states have internal predecessors, (4438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:04,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 4438 transitions. [2021-03-10 21:55:04,807 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 4438 transitions. Word has length 24 [2021-03-10 21:55:04,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:04,807 INFO L480 AbstractCegarLoop]: Abstraction has 1341 states and 4438 transitions. [2021-03-10 21:55:04,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:04,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 4438 transitions. [2021-03-10 21:55:04,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:55:04,809 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:04,809 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:05,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1289 [2021-03-10 21:55:05,009 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:05,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:05,010 INFO L82 PathProgramCache]: Analyzing trace with hash -522906514, now seen corresponding path program 163 times [2021-03-10 21:55:05,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:05,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316255520] [2021-03-10 21:55:05,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:05,240 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 21:55:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:05,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316255520] [2021-03-10 21:55:05,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694287381] [2021-03-10 21:55:05,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:05,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:55:05,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:05,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:05,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:05,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:05,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:05,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:05,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:05,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:05,755 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:55:05,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:05,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:05,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:05,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:05,763 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:05,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:05,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:05,768 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:05,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:05,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:55:05,863 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:55:06,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:06,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:06,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:06,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:06,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:06,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:06,216 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:06,281 INFO L628 ElimStorePlain]: treesize reduction 40, result has 43.7 percent of original size [2021-03-10 21:55:06,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:06,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:55:06,287 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:06,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:06,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:55:06,304 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:85, output treesize:12 [2021-03-10 21:55:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:06,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:06,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:06,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226766973] [2021-03-10 21:55:06,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:06,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:06,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:06,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:06,373 INFO L87 Difference]: Start difference. First operand 1341 states and 4438 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:06,806 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-03-10 21:55:07,098 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2021-03-10 21:55:07,452 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-10 21:55:07,639 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-10 21:55:07,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:07,743 INFO L93 Difference]: Finished difference Result 1594 states and 5095 transitions. [2021-03-10 21:55:07,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:55:07,744 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:55:07,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:07,747 INFO L225 Difference]: With dead ends: 1594 [2021-03-10 21:55:07,747 INFO L226 Difference]: Without dead ends: 1480 [2021-03-10 21:55:07,747 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1618.7ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:55:07,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-03-10 21:55:07,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1349. [2021-03-10 21:55:07,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.308605341246291) internal successors, (4460), 1348 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:07,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4460 transitions. [2021-03-10 21:55:07,763 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4460 transitions. Word has length 24 [2021-03-10 21:55:07,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:07,763 INFO L480 AbstractCegarLoop]: Abstraction has 1349 states and 4460 transitions. [2021-03-10 21:55:07,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:07,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4460 transitions. [2021-03-10 21:55:07,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:55:07,765 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:07,765 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:07,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1296,164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:07,965 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:07,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:07,965 INFO L82 PathProgramCache]: Analyzing trace with hash 2034088966, now seen corresponding path program 164 times [2021-03-10 21:55:07,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:07,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735112760] [2021-03-10 21:55:07,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:08,275 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:08,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735112760] [2021-03-10 21:55:08,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952687851] [2021-03-10 21:55:08,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:08,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:55:08,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:08,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:55:08,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:08,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:08,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:08,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:08,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:08,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:08,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:08,502 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:08,603 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:55:08,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:08,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:08,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:08,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:08,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:08,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:08,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:08,618 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:08,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:08,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:55:08,717 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:55:08,998 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-03-10 21:55:09,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:09,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:09,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:55:09,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:09,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:09,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:55:09,012 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:09,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:09,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:09,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:09,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:55:09,063 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:09,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:09,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:55:09,070 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:09,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:09,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:55:09,112 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:83, output treesize:27 [2021-03-10 21:55:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:09,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:09,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:55:09,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577400341] [2021-03-10 21:55:09,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:55:09,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:09,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:55:09,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:55:09,220 INFO L87 Difference]: Start difference. First operand 1349 states and 4460 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:09,688 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-03-10 21:55:09,987 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-03-10 21:55:10,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:10,453 INFO L93 Difference]: Finished difference Result 1592 states and 5085 transitions. [2021-03-10 21:55:10,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:55:10,454 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:55:10,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:10,457 INFO L225 Difference]: With dead ends: 1592 [2021-03-10 21:55:10,457 INFO L226 Difference]: Without dead ends: 1509 [2021-03-10 21:55:10,457 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1296.9ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:55:10,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-03-10 21:55:10,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1285. [2021-03-10 21:55:10,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 3.339563862928349) internal successors, (4288), 1284 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:10,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 4288 transitions. [2021-03-10 21:55:10,474 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 4288 transitions. Word has length 24 [2021-03-10 21:55:10,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:10,474 INFO L480 AbstractCegarLoop]: Abstraction has 1285 states and 4288 transitions. [2021-03-10 21:55:10,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:10,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 4288 transitions. [2021-03-10 21:55:10,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:55:10,476 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:10,476 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:10,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1302 [2021-03-10 21:55:10,677 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:10,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:10,677 INFO L82 PathProgramCache]: Analyzing trace with hash -2041582354, now seen corresponding path program 165 times [2021-03-10 21:55:10,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:10,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639787064] [2021-03-10 21:55:10,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:10,996 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:55:10,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639787064] [2021-03-10 21:55:10,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496679955] [2021-03-10 21:55:10,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:11,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:55:11,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:11,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:55:11,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:11,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:11,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:11,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:11,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:11,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:11,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:11,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:11,349 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:55:11,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:11,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:11,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:11,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:11,357 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:11,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:11,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:11,363 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:11,478 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 21:55:11,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:11,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:55:11,482 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:55:11,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:11,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:11,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:55:11,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:11,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:11,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:55:11,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:11,942 INFO L628 ElimStorePlain]: treesize reduction 52, result has 37.3 percent of original size [2021-03-10 21:55:11,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:11,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:55:11,949 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:11,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:11,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:55:11,987 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:93, output treesize:12 [2021-03-10 21:55:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:55:12,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:12,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:12,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781591979] [2021-03-10 21:55:12,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:12,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:12,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:12,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:12,080 INFO L87 Difference]: Start difference. First operand 1285 states and 4288 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:12,637 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-03-10 21:55:12,952 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-03-10 21:55:13,716 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-03-10 21:55:13,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:13,855 INFO L93 Difference]: Finished difference Result 1559 states and 4992 transitions. [2021-03-10 21:55:13,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:55:13,857 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:55:13,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:13,859 INFO L225 Difference]: With dead ends: 1559 [2021-03-10 21:55:13,859 INFO L226 Difference]: Without dead ends: 1465 [2021-03-10 21:55:13,860 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1634.6ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:55:13,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-03-10 21:55:13,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 1290. [2021-03-10 21:55:13,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1289 states have (on average 3.335919317300233) internal successors, (4300), 1289 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:13,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 4300 transitions. [2021-03-10 21:55:13,875 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 4300 transitions. Word has length 24 [2021-03-10 21:55:13,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:13,875 INFO L480 AbstractCegarLoop]: Abstraction has 1290 states and 4300 transitions. [2021-03-10 21:55:13,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:13,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 4300 transitions. [2021-03-10 21:55:13,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:55:13,876 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:13,876 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:14,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1310,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:14,077 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:14,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:14,077 INFO L82 PathProgramCache]: Analyzing trace with hash 219748462, now seen corresponding path program 166 times [2021-03-10 21:55:14,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:14,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949631950] [2021-03-10 21:55:14,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:14,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949631950] [2021-03-10 21:55:14,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525952867] [2021-03-10 21:55:14,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:14,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:55:14,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:14,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:55:14,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:14,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:14,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:14,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:14,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:14,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:14,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:14,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:14,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:14,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:14,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:14,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:14,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:14,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:14,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:14,753 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:14,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:14,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:55:14,849 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:55:15,182 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-03-10 21:55:15,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:15,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:15,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:15,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:15,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:15,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:15,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:15,202 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:15,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:15,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:15,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:15,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:15,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:15,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:15,218 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:15,401 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-03-10 21:55:15,402 INFO L628 ElimStorePlain]: treesize reduction 87, result has 46.0 percent of original size [2021-03-10 21:55:15,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:15,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:15,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:55:15,411 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:15,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:15,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:55:15,419 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:15,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:15,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:55:15,474 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:185, output treesize:34 [2021-03-10 21:55:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:15,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:15,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:15,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425519221] [2021-03-10 21:55:15,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:15,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:15,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:15,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:15,622 INFO L87 Difference]: Start difference. First operand 1290 states and 4300 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:16,051 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-03-10 21:55:16,334 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-03-10 21:55:17,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:17,247 INFO L93 Difference]: Finished difference Result 1675 states and 5342 transitions. [2021-03-10 21:55:17,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:55:17,249 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:55:17,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:17,252 INFO L225 Difference]: With dead ends: 1675 [2021-03-10 21:55:17,252 INFO L226 Difference]: Without dead ends: 1553 [2021-03-10 21:55:17,252 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1633.2ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:55:17,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2021-03-10 21:55:17,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1287. [2021-03-10 21:55:17,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 3.3351477449455675) internal successors, (4289), 1286 states have internal predecessors, (4289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:17,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 4289 transitions. [2021-03-10 21:55:17,269 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 4289 transitions. Word has length 24 [2021-03-10 21:55:17,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:17,269 INFO L480 AbstractCegarLoop]: Abstraction has 1287 states and 4289 transitions. [2021-03-10 21:55:17,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:17,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 4289 transitions. [2021-03-10 21:55:17,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:55:17,271 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:17,271 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:17,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1316 [2021-03-10 21:55:17,472 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:17,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:17,472 INFO L82 PathProgramCache]: Analyzing trace with hash 45856292, now seen corresponding path program 167 times [2021-03-10 21:55:17,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:17,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854272369] [2021-03-10 21:55:17,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:17,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854272369] [2021-03-10 21:55:17,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92530315] [2021-03-10 21:55:17,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:17,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:55:17,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:17,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:55:17,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:18,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:18,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:18,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:18,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:18,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:18,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:18,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:18,140 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:55:18,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:18,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:18,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:18,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:18,148 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:18,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:18,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:18,155 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:18,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:18,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:55:18,259 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:55:18,456 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-03-10 21:55:18,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:18,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:18,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:55:18,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:18,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:18,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:18,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:18,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:18,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:18,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:18,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:18,482 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:18,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:18,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:18,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:18,491 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:18,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:18,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:18,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:55:18,500 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:18,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:18,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:18,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:55:18,509 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:18,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:18,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:18,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:18,518 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:18,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:18,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:55:18,525 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:18,883 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-03-10 21:55:18,884 INFO L628 ElimStorePlain]: treesize reduction 168, result has 50.1 percent of original size [2021-03-10 21:55:18,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:18,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:18,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:55:18,894 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:18,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:18,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:55:18,903 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:19,044 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 21:55:19,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:19,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:55:19,047 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:385, output treesize:96 [2021-03-10 21:55:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:19,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:19,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:55:19,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662774636] [2021-03-10 21:55:19,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:55:19,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:19,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:55:19,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:55:19,353 INFO L87 Difference]: Start difference. First operand 1287 states and 4289 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:19,840 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-03-10 21:55:20,128 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-03-10 21:55:20,315 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-10 21:55:20,546 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 21:55:20,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:20,982 INFO L93 Difference]: Finished difference Result 1696 states and 5388 transitions. [2021-03-10 21:55:20,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:55:20,984 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:55:20,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:20,987 INFO L225 Difference]: With dead ends: 1696 [2021-03-10 21:55:20,987 INFO L226 Difference]: Without dead ends: 1608 [2021-03-10 21:55:20,987 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1674.3ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:55:20,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-03-10 21:55:21,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1292. [2021-03-10 21:55:21,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.3423702556158017) internal successors, (4315), 1291 states have internal predecessors, (4315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:21,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4315 transitions. [2021-03-10 21:55:21,004 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4315 transitions. Word has length 24 [2021-03-10 21:55:21,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:21,005 INFO L480 AbstractCegarLoop]: Abstraction has 1292 states and 4315 transitions. [2021-03-10 21:55:21,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:21,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4315 transitions. [2021-03-10 21:55:21,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:55:21,006 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:21,006 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:21,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1324,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:21,207 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:21,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:21,207 INFO L82 PathProgramCache]: Analyzing trace with hash -834417244, now seen corresponding path program 168 times [2021-03-10 21:55:21,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:21,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337432839] [2021-03-10 21:55:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:21,482 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-03-10 21:55:21,607 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-03-10 21:55:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:55:21,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337432839] [2021-03-10 21:55:21,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663274514] [2021-03-10 21:55:21,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:21,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:55:21,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:21,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:55:21,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:21,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:21,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:21,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:21,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:21,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:21,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:21,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:22,032 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:55:22,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:22,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:22,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:22,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:22,041 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:22,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:22,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:22,048 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:22,151 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 21:55:22,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:22,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:55:22,156 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-03-10 21:55:22,361 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-03-10 21:55:22,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:22,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:22,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:55:22,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:22,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:22,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:22,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:22,379 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:22,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:22,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:22,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:22,387 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:22,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:22,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:55:22,395 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:22,504 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 21:55:22,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:22,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:22,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:22,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:55:22,518 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:22,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:22,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:22,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:55:22,527 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:22,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:22,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:22,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:55:22,537 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:22,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:22,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:55:22,547 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:22,649 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 21:55:22,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:22,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:55:22,652 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:173, output treesize:69 [2021-03-10 21:55:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:55:22,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:22,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:22,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322997900] [2021-03-10 21:55:22,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:22,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:22,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:22,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:22,898 INFO L87 Difference]: Start difference. First operand 1292 states and 4315 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:23,303 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-03-10 21:55:24,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:24,052 INFO L93 Difference]: Finished difference Result 1712 states and 5445 transitions. [2021-03-10 21:55:24,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:55:24,053 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:55:24,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:24,056 INFO L225 Difference]: With dead ends: 1712 [2021-03-10 21:55:24,057 INFO L226 Difference]: Without dead ends: 1674 [2021-03-10 21:55:24,057 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1491.8ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:55:24,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2021-03-10 21:55:24,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1292. [2021-03-10 21:55:24,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.343144848954299) internal successors, (4316), 1291 states have internal predecessors, (4316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:24,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4316 transitions. [2021-03-10 21:55:24,073 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4316 transitions. Word has length 24 [2021-03-10 21:55:24,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:24,074 INFO L480 AbstractCegarLoop]: Abstraction has 1292 states and 4316 transitions. [2021-03-10 21:55:24,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:24,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4316 transitions. [2021-03-10 21:55:24,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:55:24,075 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:24,075 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:24,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1332 [2021-03-10 21:55:24,276 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:24,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:24,276 INFO L82 PathProgramCache]: Analyzing trace with hash -897992996, now seen corresponding path program 169 times [2021-03-10 21:55:24,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:24,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600957909] [2021-03-10 21:55:24,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:24,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:24,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600957909] [2021-03-10 21:55:24,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807052673] [2021-03-10 21:55:24,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:24,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:55:24,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:24,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:24,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:24,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:24,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:24,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:24,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:24,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:24,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:24,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:55:24,974 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-03-10 21:55:25,093 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-03-10 21:55:25,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:25,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:25,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:25,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:25,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:25,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:25,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:25,110 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:25,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:25,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:25,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:25,118 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:25,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:25,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:25,125 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:25,271 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-03-10 21:55:25,272 INFO L628 ElimStorePlain]: treesize reduction 87, result has 46.0 percent of original size [2021-03-10 21:55:25,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:25,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:25,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:55:25,281 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:25,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:25,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:55:25,288 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:25,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:25,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:55:25,349 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:185, output treesize:34 [2021-03-10 21:55:25,537 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:25,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:25,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:25,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774154497] [2021-03-10 21:55:25,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:25,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:25,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:25,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:25,538 INFO L87 Difference]: Start difference. First operand 1292 states and 4316 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:26,046 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-03-10 21:55:26,711 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 21:55:26,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:26,783 INFO L93 Difference]: Finished difference Result 1684 states and 5409 transitions. [2021-03-10 21:55:26,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:55:26,784 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:55:26,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:26,787 INFO L225 Difference]: With dead ends: 1684 [2021-03-10 21:55:26,787 INFO L226 Difference]: Without dead ends: 1584 [2021-03-10 21:55:26,787 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1317.5ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:55:26,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-03-10 21:55:26,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 1306. [2021-03-10 21:55:26,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.346360153256705) internal successors, (4367), 1305 states have internal predecessors, (4367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:26,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4367 transitions. [2021-03-10 21:55:26,804 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4367 transitions. Word has length 24 [2021-03-10 21:55:26,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:26,804 INFO L480 AbstractCegarLoop]: Abstraction has 1306 states and 4367 transitions. [2021-03-10 21:55:26,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:26,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4367 transitions. [2021-03-10 21:55:26,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:55:26,806 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:26,806 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:27,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1340,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:27,006 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:27,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:27,007 INFO L82 PathProgramCache]: Analyzing trace with hash 549210886, now seen corresponding path program 170 times [2021-03-10 21:55:27,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:27,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661179834] [2021-03-10 21:55:27,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:27,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661179834] [2021-03-10 21:55:27,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660633915] [2021-03-10 21:55:27,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:27,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:55:27,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:27,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:55:27,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:27,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:27,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:27,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:27,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:27,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-03-10 21:55:27,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:27,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:27,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:27,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:27,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:27,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:27,788 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:27,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:27,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:27,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:27,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:55:27,849 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:27,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:27,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:55:27,858 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:27,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:27,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:55:27,904 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:31 [2021-03-10 21:55:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:28,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:28,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:28,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190606208] [2021-03-10 21:55:28,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:28,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:28,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:28,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:28,048 INFO L87 Difference]: Start difference. First operand 1306 states and 4367 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:28,616 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-03-10 21:55:28,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:28,897 INFO L93 Difference]: Finished difference Result 1537 states and 5060 transitions. [2021-03-10 21:55:28,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:55:28,899 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:55:28,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:28,901 INFO L225 Difference]: With dead ends: 1537 [2021-03-10 21:55:28,902 INFO L226 Difference]: Without dead ends: 1491 [2021-03-10 21:55:28,902 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1098.9ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:55:28,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2021-03-10 21:55:28,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1306. [2021-03-10 21:55:28,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.346360153256705) internal successors, (4367), 1305 states have internal predecessors, (4367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:28,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4367 transitions. [2021-03-10 21:55:28,929 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4367 transitions. Word has length 24 [2021-03-10 21:55:28,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:28,929 INFO L480 AbstractCegarLoop]: Abstraction has 1306 states and 4367 transitions. [2021-03-10 21:55:28,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:28,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4367 transitions. [2021-03-10 21:55:28,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:55:28,931 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:28,931 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:29,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1346 [2021-03-10 21:55:29,131 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:29,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:29,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1180415388, now seen corresponding path program 171 times [2021-03-10 21:55:29,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:29,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293777587] [2021-03-10 21:55:29,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:29,422 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-03-10 21:55:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:29,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293777587] [2021-03-10 21:55:29,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812238700] [2021-03-10 21:55:29,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:29,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:55:29,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:29,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:55:29,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:29,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:29,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:29,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:29,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:29,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:29,777 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:29,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:29,783 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:29,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:29,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:55:29,880 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-03-10 21:55:30,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:30,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:30,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:55:30,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:30,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:30,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:55:30,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:30,508 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-03-10 21:55:30,509 INFO L628 ElimStorePlain]: treesize reduction 157, result has 54.8 percent of original size [2021-03-10 21:55:30,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:30,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:30,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:30,665 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-10 21:55:30,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:30,666 INFO L518 ElimStorePlain]: Eliminatee v_prenex_716 vanished before elimination [2021-03-10 21:55:30,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:30,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:55:30,674 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:30,829 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 21:55:30,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:30,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:30,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:30,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:55:30,838 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:30,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:55:30,845 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:30,997 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 21:55:30,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:31,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:31,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:55:31,006 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:31,165 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 21:55:31,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:31,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:31,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:31,173 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:31,316 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 21:55:31,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:31,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:31,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:55:31,327 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:31,503 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 21:55:31,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:31,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:55:31,507 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-03-10 21:55:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:31,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:31,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:31,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799245174] [2021-03-10 21:55:31,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:31,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:31,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:31,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:31,826 INFO L87 Difference]: Start difference. First operand 1306 states and 4367 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:32,621 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-10 21:55:33,441 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-03-10 21:55:33,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:33,447 INFO L93 Difference]: Finished difference Result 1788 states and 5729 transitions. [2021-03-10 21:55:33,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:55:33,448 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:55:33,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:33,451 INFO L225 Difference]: With dead ends: 1788 [2021-03-10 21:55:33,451 INFO L226 Difference]: Without dead ends: 1708 [2021-03-10 21:55:33,452 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1679.6ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:55:33,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2021-03-10 21:55:33,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1320. [2021-03-10 21:55:33,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 3.3540561031084155) internal successors, (4424), 1319 states have internal predecessors, (4424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:33,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 4424 transitions. [2021-03-10 21:55:33,469 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 4424 transitions. Word has length 24 [2021-03-10 21:55:33,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:33,469 INFO L480 AbstractCegarLoop]: Abstraction has 1320 states and 4424 transitions. [2021-03-10 21:55:33,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:33,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 4424 transitions. [2021-03-10 21:55:33,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:55:33,471 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:33,471 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:33,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1349,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:33,671 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:33,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:33,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1514961444, now seen corresponding path program 172 times [2021-03-10 21:55:33,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:33,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62366723] [2021-03-10 21:55:33,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:34,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62366723] [2021-03-10 21:55:34,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869060980] [2021-03-10 21:55:34,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:34,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:55:34,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:34,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:55:34,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:34,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:34,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:34,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:34,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:34,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:34,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:34,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:34,194 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:34,297 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 21:55:34,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:34,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:55:34,302 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-03-10 21:55:34,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:34,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:34,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:55:34,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:34,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:34,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:55:34,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:34,915 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-03-10 21:55:34,916 INFO L628 ElimStorePlain]: treesize reduction 164, result has 52.7 percent of original size [2021-03-10 21:55:34,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:34,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:55:34,926 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:35,084 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-10 21:55:35,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:35,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:35,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:35,093 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:35,243 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-10 21:55:35,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:35,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:55:35,250 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:35,393 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 21:55:35,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:35,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:35,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:55:35,403 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:35,544 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 21:55:35,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:35,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:35,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:35,553 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:35,698 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 21:55:35,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:35,699 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:55:35,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:35,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:55:35,708 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:35,841 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 21:55:35,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:35,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:55:35,844 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-03-10 21:55:36,142 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:36,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:36,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:55:36,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692522966] [2021-03-10 21:55:36,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:55:36,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:36,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:55:36,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:55:36,144 INFO L87 Difference]: Start difference. First operand 1320 states and 4424 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:37,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:37,119 INFO L93 Difference]: Finished difference Result 1754 states and 5590 transitions. [2021-03-10 21:55:37,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:55:37,124 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:55:37,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:37,127 INFO L225 Difference]: With dead ends: 1754 [2021-03-10 21:55:37,127 INFO L226 Difference]: Without dead ends: 1667 [2021-03-10 21:55:37,127 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 960.4ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:55:37,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2021-03-10 21:55:37,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1318. [2021-03-10 21:55:37,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.355353075170843) internal successors, (4419), 1317 states have internal predecessors, (4419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:37,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 4419 transitions. [2021-03-10 21:55:37,144 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 4419 transitions. Word has length 24 [2021-03-10 21:55:37,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:37,144 INFO L480 AbstractCegarLoop]: Abstraction has 1318 states and 4419 transitions. [2021-03-10 21:55:37,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:37,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 4419 transitions. [2021-03-10 21:55:37,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:55:37,145 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:37,145 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:37,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1356 [2021-03-10 21:55:37,346 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:37,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:37,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1954619758, now seen corresponding path program 173 times [2021-03-10 21:55:37,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:37,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821045012] [2021-03-10 21:55:37,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:37,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821045012] [2021-03-10 21:55:37,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734161078] [2021-03-10 21:55:37,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:37,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:55:37,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:37,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:55:37,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:37,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:37,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:37,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:37,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:37,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:37,953 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:37,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:37,959 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:38,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:38,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:55:38,054 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-03-10 21:55:38,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:38,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:38,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:38,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:38,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:38,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:38,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:38,452 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-10 21:55:38,453 INFO L628 ElimStorePlain]: treesize reduction 87, result has 46.0 percent of original size [2021-03-10 21:55:38,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:38,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:38,459 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:38,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:38,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:38,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:55:38,518 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:38,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:38,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:38,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:55:38,579 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:38,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:38,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:55:38,629 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:34 [2021-03-10 21:55:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:38,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:38,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:38,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344303375] [2021-03-10 21:55:38,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:38,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:38,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:38,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:38,798 INFO L87 Difference]: Start difference. First operand 1318 states and 4419 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:39,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:39,755 INFO L93 Difference]: Finished difference Result 1843 states and 5929 transitions. [2021-03-10 21:55:39,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:55:39,757 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:55:39,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:39,760 INFO L225 Difference]: With dead ends: 1843 [2021-03-10 21:55:39,760 INFO L226 Difference]: Without dead ends: 1727 [2021-03-10 21:55:39,761 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1089.6ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:55:39,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2021-03-10 21:55:39,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1322. [2021-03-10 21:55:39,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 3.359576078728236) internal successors, (4438), 1321 states have internal predecessors, (4438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:39,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 4438 transitions. [2021-03-10 21:55:39,779 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 4438 transitions. Word has length 24 [2021-03-10 21:55:39,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:39,779 INFO L480 AbstractCegarLoop]: Abstraction has 1322 states and 4438 transitions. [2021-03-10 21:55:39,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:39,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 4438 transitions. [2021-03-10 21:55:39,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:55:39,781 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:39,781 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:39,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1363 [2021-03-10 21:55:39,983 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:39,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:39,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1625187830, now seen corresponding path program 174 times [2021-03-10 21:55:39,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:39,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985146598] [2021-03-10 21:55:39,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:39,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:40,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985146598] [2021-03-10 21:55:40,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710807615] [2021-03-10 21:55:40,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:40,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:55:40,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:40,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:55:40,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:40,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:55:40,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:40,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:40,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:55:40,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:25 [2021-03-10 21:55:40,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:55:40,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:40,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:55:40,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:40,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:40,569 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:55:40,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:55:40,570 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:37 [2021-03-10 21:55:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:40,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:40,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:55:40,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490477931] [2021-03-10 21:55:40,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:55:40,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:40,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:55:40,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:55:40,764 INFO L87 Difference]: Start difference. First operand 1322 states and 4438 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:41,403 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-03-10 21:55:41,797 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-10 21:55:42,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:42,076 INFO L93 Difference]: Finished difference Result 1802 states and 5756 transitions. [2021-03-10 21:55:42,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:55:42,077 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:55:42,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:42,081 INFO L225 Difference]: With dead ends: 1802 [2021-03-10 21:55:42,081 INFO L226 Difference]: Without dead ends: 1699 [2021-03-10 21:55:42,081 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1130.8ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:55:42,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2021-03-10 21:55:42,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1351. [2021-03-10 21:55:42,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 1350 states have (on average 3.351111111111111) internal successors, (4524), 1350 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:42,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 4524 transitions. [2021-03-10 21:55:42,099 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 4524 transitions. Word has length 24 [2021-03-10 21:55:42,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:42,099 INFO L480 AbstractCegarLoop]: Abstraction has 1351 states and 4524 transitions. [2021-03-10 21:55:42,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:42,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 4524 transitions. [2021-03-10 21:55:42,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:55:42,101 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:42,101 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:42,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1370,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:42,301 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:42,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:42,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1932983276, now seen corresponding path program 175 times [2021-03-10 21:55:42,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:42,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382667271] [2021-03-10 21:55:42,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:42,607 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 21:55:42,678 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:42,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382667271] [2021-03-10 21:55:42,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551247944] [2021-03-10 21:55:42,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:42,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:55:42,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:42,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:55:42,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:42,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:55:42,854 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:42,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:42,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:55:42,898 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-03-10 21:55:42,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:55:42,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:42,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:55:42,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:43,103 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-03-10 21:55:43,104 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-03-10 21:55:43,104 INFO L518 ElimStorePlain]: Eliminatee v_prenex_736 vanished before elimination [2021-03-10 21:55:43,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:55:43,109 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:43,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:43,150 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:55:43,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:55:43,151 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:40 [2021-03-10 21:55:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:43,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:43,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:55:43,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314480526] [2021-03-10 21:55:43,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:55:43,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:43,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:55:43,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:55:43,329 INFO L87 Difference]: Start difference. First operand 1351 states and 4524 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:43,951 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 21:55:44,104 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 21:55:44,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:44,130 INFO L93 Difference]: Finished difference Result 1732 states and 5570 transitions. [2021-03-10 21:55:44,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:55:44,131 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:55:44,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:44,134 INFO L225 Difference]: With dead ends: 1732 [2021-03-10 21:55:44,134 INFO L226 Difference]: Without dead ends: 1616 [2021-03-10 21:55:44,134 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 995.4ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:55:44,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-03-10 21:55:44,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1337. [2021-03-10 21:55:44,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 3.339820359281437) internal successors, (4462), 1336 states have internal predecessors, (4462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:44,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 4462 transitions. [2021-03-10 21:55:44,151 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 4462 transitions. Word has length 24 [2021-03-10 21:55:44,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:44,151 INFO L480 AbstractCegarLoop]: Abstraction has 1337 states and 4462 transitions. [2021-03-10 21:55:44,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:44,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 4462 transitions. [2021-03-10 21:55:44,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:55:44,153 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:44,153 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:44,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1374 [2021-03-10 21:55:44,363 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:44,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:44,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1372052590, now seen corresponding path program 176 times [2021-03-10 21:55:44,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:44,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218144142] [2021-03-10 21:55:44,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:44,650 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 21:55:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:44,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218144142] [2021-03-10 21:55:44,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374983524] [2021-03-10 21:55:44,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:44,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:55:44,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:44,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:55:44,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:44,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:55:44,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:44,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:44,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:55:44,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:22 [2021-03-10 21:55:44,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:55:44,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:44,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:55:44,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:45,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:45,027 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:55:45,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:55:45,028 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:37 [2021-03-10 21:55:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:45,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:45,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:55:45,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726222122] [2021-03-10 21:55:45,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:55:45,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:45,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:55:45,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:55:45,202 INFO L87 Difference]: Start difference. First operand 1337 states and 4462 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:45,752 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-10 21:55:45,943 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-03-10 21:55:46,226 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-03-10 21:55:46,396 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2021-03-10 21:55:46,574 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-03-10 21:55:46,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:46,651 INFO L93 Difference]: Finished difference Result 1999 states and 6373 transitions. [2021-03-10 21:55:46,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:55:46,652 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:55:46,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:46,656 INFO L225 Difference]: With dead ends: 1999 [2021-03-10 21:55:46,656 INFO L226 Difference]: Without dead ends: 1876 [2021-03-10 21:55:46,657 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1500.2ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:55:46,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1876 states. [2021-03-10 21:55:46,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1876 to 1364. [2021-03-10 21:55:46,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1363 states have (on average 3.3528980190755684) internal successors, (4570), 1363 states have internal predecessors, (4570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:46,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 4570 transitions. [2021-03-10 21:55:46,675 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 4570 transitions. Word has length 24 [2021-03-10 21:55:46,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:46,675 INFO L480 AbstractCegarLoop]: Abstraction has 1364 states and 4570 transitions. [2021-03-10 21:55:46,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:46,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 4570 transitions. [2021-03-10 21:55:46,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:55:46,677 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:46,677 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:46,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1379 [2021-03-10 21:55:46,879 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:46,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:46,879 INFO L82 PathProgramCache]: Analyzing trace with hash -358373054, now seen corresponding path program 177 times [2021-03-10 21:55:46,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:46,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923645388] [2021-03-10 21:55:46,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:47,207 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:47,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923645388] [2021-03-10 21:55:47,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339849337] [2021-03-10 21:55:47,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:47,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:55:47,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:47,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:55:47,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:47,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:47,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:47,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:47,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:47,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:47,327 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:47,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:47,332 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:47,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:47,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:55:47,392 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-03-10 21:55:47,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:55:47,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:47,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:47,611 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:47,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:47,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:47,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:47,623 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:47,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:55:47,629 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:47,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:55:47,635 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:47,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:55:47,641 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:47,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:47,647 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:47,858 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 21:55:47,859 INFO L628 ElimStorePlain]: treesize reduction 121, result has 49.8 percent of original size [2021-03-10 21:55:47,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:55:47,866 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:47,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:55:47,873 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:47,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:55:47,880 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:47,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:47,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:55:47,979 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:297, output treesize:96 [2021-03-10 21:55:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:48,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:48,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:48,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921114262] [2021-03-10 21:55:48,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:48,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:48,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:48,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:48,274 INFO L87 Difference]: Start difference. First operand 1364 states and 4570 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:48,800 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 21:55:49,012 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-10 21:55:49,223 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-10 21:55:49,431 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-03-10 21:55:49,593 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-10 21:55:49,796 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 21:55:50,238 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-03-10 21:55:50,420 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 21:55:50,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:50,550 INFO L93 Difference]: Finished difference Result 2176 states and 6943 transitions. [2021-03-10 21:55:50,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:55:50,552 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:55:50,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:50,556 INFO L225 Difference]: With dead ends: 2176 [2021-03-10 21:55:50,556 INFO L226 Difference]: Without dead ends: 2096 [2021-03-10 21:55:50,556 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2378.0ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:55:50,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2021-03-10 21:55:50,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 1394. [2021-03-10 21:55:50,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 3.361091170136396) internal successors, (4682), 1393 states have internal predecessors, (4682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:50,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 4682 transitions. [2021-03-10 21:55:50,575 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 4682 transitions. Word has length 24 [2021-03-10 21:55:50,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:50,576 INFO L480 AbstractCegarLoop]: Abstraction has 1394 states and 4682 transitions. [2021-03-10 21:55:50,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:50,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 4682 transitions. [2021-03-10 21:55:50,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:55:50,577 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:50,577 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:50,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1382,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:50,778 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:50,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:50,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1592713996, now seen corresponding path program 178 times [2021-03-10 21:55:50,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:50,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487172221] [2021-03-10 21:55:50,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:51,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:51,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487172221] [2021-03-10 21:55:51,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354036945] [2021-03-10 21:55:51,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:51,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:55:51,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:51,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:55:51,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:51,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:51,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:51,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:51,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:51,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:51,401 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:51,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:51,409 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:51,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:51,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:55:51,501 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-03-10 21:55:51,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:51,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:51,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:55:51,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:51,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:51,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:55:51,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:52,239 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-03-10 21:55:52,240 INFO L628 ElimStorePlain]: treesize reduction 165, result has 52.7 percent of original size [2021-03-10 21:55:52,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:55:52,259 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:52,420 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 21:55:52,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:52,420 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:55:52,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:52,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:52,428 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:52,587 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 21:55:52,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:52,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:52,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:55:52,597 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:52,755 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-10 21:55:52,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:52,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:52,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:52,763 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:52,916 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-10 21:55:52,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:52,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:52,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:55:52,926 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:53,067 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 21:55:53,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:53,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:53,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:55:53,077 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:53,210 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-10 21:55:53,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:53,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:55:53,213 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-03-10 21:55:53,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:53,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:53,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:53,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822703703] [2021-03-10 21:55:53,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:53,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:53,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:53,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:53,533 INFO L87 Difference]: Start difference. First operand 1394 states and 4682 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:54,385 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-03-10 21:55:54,586 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-03-10 21:55:54,784 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-10 21:55:55,117 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 51 [2021-03-10 21:55:55,324 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-03-10 21:55:55,653 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-10 21:55:55,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:55,936 INFO L93 Difference]: Finished difference Result 2215 states and 7010 transitions. [2021-03-10 21:55:55,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:55:55,937 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:55:55,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:55,941 INFO L225 Difference]: With dead ends: 2215 [2021-03-10 21:55:55,941 INFO L226 Difference]: Without dead ends: 2138 [2021-03-10 21:55:55,941 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2612.1ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:55:55,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-03-10 21:55:55,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1394. [2021-03-10 21:55:55,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 3.362526920315865) internal successors, (4684), 1393 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:55,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 4684 transitions. [2021-03-10 21:55:55,961 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 4684 transitions. Word has length 24 [2021-03-10 21:55:55,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:55,961 INFO L480 AbstractCegarLoop]: Abstraction has 1394 states and 4684 transitions. [2021-03-10 21:55:55,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:55,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 4684 transitions. [2021-03-10 21:55:55,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:55:55,963 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:55,963 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:56,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1387 [2021-03-10 21:55:56,164 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:56,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:56,164 INFO L82 PathProgramCache]: Analyzing trace with hash 415831316, now seen corresponding path program 179 times [2021-03-10 21:55:56,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:56,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405470266] [2021-03-10 21:55:56,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:56,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405470266] [2021-03-10 21:55:56,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344801305] [2021-03-10 21:55:56,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:56,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:55:56,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:56,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:55:56,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:56,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:56,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:56,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:56,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:56,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:56,746 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:56,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:55:56,751 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:56,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:56,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:55:56,838 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-03-10 21:55:57,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:57,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:57,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:57,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:57,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:57,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:57,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:57,389 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-10 21:55:57,390 INFO L628 ElimStorePlain]: treesize reduction 86, result has 45.9 percent of original size [2021-03-10 21:55:57,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:57,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:57,414 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:57,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:57,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:57,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:55:57,486 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:57,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:57,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:57,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:55:57,552 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:57,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:57,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:55:57,611 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:34 [2021-03-10 21:55:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:55:57,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:57,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:57,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064829597] [2021-03-10 21:55:57,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:57,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:57,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:57,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:57,805 INFO L87 Difference]: Start difference. First operand 1394 states and 4684 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:58,317 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-10 21:55:58,552 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-10 21:55:58,786 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-10 21:55:59,013 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-10 21:55:59,225 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-03-10 21:55:59,808 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-03-10 21:56:00,123 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-10 21:56:00,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:00,302 INFO L93 Difference]: Finished difference Result 2318 states and 7360 transitions. [2021-03-10 21:56:00,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:56:00,304 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:56:00,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:00,308 INFO L225 Difference]: With dead ends: 2318 [2021-03-10 21:56:00,308 INFO L226 Difference]: Without dead ends: 2171 [2021-03-10 21:56:00,308 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 2471.2ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:56:00,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-03-10 21:56:00,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 1401. [2021-03-10 21:56:00,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1400 states have (on average 3.3707142857142856) internal successors, (4719), 1400 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:00,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 4719 transitions. [2021-03-10 21:56:00,329 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 4719 transitions. Word has length 24 [2021-03-10 21:56:00,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:00,329 INFO L480 AbstractCegarLoop]: Abstraction has 1401 states and 4719 transitions. [2021-03-10 21:56:00,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:00,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 4719 transitions. [2021-03-10 21:56:00,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:56:00,331 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:00,331 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:00,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1395,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:00,531 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:00,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:00,532 INFO L82 PathProgramCache]: Analyzing trace with hash 253826086, now seen corresponding path program 180 times [2021-03-10 21:56:00,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:00,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131405953] [2021-03-10 21:56:00,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:00,994 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:00,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131405953] [2021-03-10 21:56:00,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796595273] [2021-03-10 21:56:00,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:01,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:56:01,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:01,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:56:01,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:01,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:56:01,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:01,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:56:01,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:01,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:01,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:56:01,172 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:47 [2021-03-10 21:56:01,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:01,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:01,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:01,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:01,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:01,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:01,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:01,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:01,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:01,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:01,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:56:01,443 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:01,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:01,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:56:01,454 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:01,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:01,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:56:01,513 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:31 [2021-03-10 21:56:01,739 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:01,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:01,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:56:01,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537821417] [2021-03-10 21:56:01,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:56:01,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:01,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:56:01,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:56:01,740 INFO L87 Difference]: Start difference. First operand 1401 states and 4719 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:02,086 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-10 21:56:02,677 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-10 21:56:02,858 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-03-10 21:56:03,112 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-10 21:56:03,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:03,604 INFO L93 Difference]: Finished difference Result 2465 states and 7985 transitions. [2021-03-10 21:56:03,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:56:03,606 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:56:03,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:03,611 INFO L225 Difference]: With dead ends: 2465 [2021-03-10 21:56:03,611 INFO L226 Difference]: Without dead ends: 2406 [2021-03-10 21:56:03,611 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1732.6ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:56:03,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2021-03-10 21:56:03,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 1383. [2021-03-10 21:56:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 3.3589001447178) internal successors, (4642), 1382 states have internal predecessors, (4642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:03,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 4642 transitions. [2021-03-10 21:56:03,632 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 4642 transitions. Word has length 24 [2021-03-10 21:56:03,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:03,632 INFO L480 AbstractCegarLoop]: Abstraction has 1383 states and 4642 transitions. [2021-03-10 21:56:03,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:03,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 4642 transitions. [2021-03-10 21:56:03,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:56:03,633 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:03,634 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:03,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1402 [2021-03-10 21:56:03,834 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:03,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:03,834 INFO L82 PathProgramCache]: Analyzing trace with hash 678435982, now seen corresponding path program 181 times [2021-03-10 21:56:03,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:03,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756697209] [2021-03-10 21:56:03,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:04,326 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:04,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756697209] [2021-03-10 21:56:04,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111752343] [2021-03-10 21:56:04,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:04,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:56:04,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:04,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:04,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:04,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:04,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:04,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:04,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:04,593 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:04,771 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 21:56:04,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:04,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:04,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:04,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:04,780 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:04,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:04,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:04,787 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:04,952 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 21:56:04,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:04,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:56:04,957 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-03-10 21:56:05,339 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-03-10 21:56:05,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:05,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:05,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:05,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:05,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:05,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:05,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:56:05,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:05,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:05,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:05,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:56:05,365 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:05,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:05,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:05,373 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:05,596 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-10 21:56:05,597 INFO L628 ElimStorePlain]: treesize reduction 59, result has 65.5 percent of original size [2021-03-10 21:56:05,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:05,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:05,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:56:05,607 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:05,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:05,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:56:05,616 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:05,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:05,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:56:05,709 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:197, output treesize:50 [2021-03-10 21:56:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:05,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:05,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:56:05,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544251754] [2021-03-10 21:56:05,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:56:05,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:05,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:56:05,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:56:05,890 INFO L87 Difference]: Start difference. First operand 1383 states and 4642 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:06,365 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-03-10 21:56:06,657 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-03-10 21:56:07,218 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-03-10 21:56:07,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:07,219 INFO L93 Difference]: Finished difference Result 1592 states and 5191 transitions. [2021-03-10 21:56:07,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:56:07,219 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:56:07,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:07,222 INFO L225 Difference]: With dead ends: 1592 [2021-03-10 21:56:07,223 INFO L226 Difference]: Without dead ends: 1508 [2021-03-10 21:56:07,223 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1539.8ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:56:07,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2021-03-10 21:56:07,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1397. [2021-03-10 21:56:07,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 3.355300859598854) internal successors, (4684), 1396 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:07,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 4684 transitions. [2021-03-10 21:56:07,239 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 4684 transitions. Word has length 24 [2021-03-10 21:56:07,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:07,239 INFO L480 AbstractCegarLoop]: Abstraction has 1397 states and 4684 transitions. [2021-03-10 21:56:07,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:07,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 4684 transitions. [2021-03-10 21:56:07,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:56:07,241 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:07,241 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:07,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1407,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:07,441 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:07,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:07,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1289894484, now seen corresponding path program 182 times [2021-03-10 21:56:07,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:07,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040159455] [2021-03-10 21:56:07,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:07,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040159455] [2021-03-10 21:56:07,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061738385] [2021-03-10 21:56:07,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:07,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:56:07,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:07,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:56:07,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:07,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:07,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:07,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:07,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:07,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:07,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:07,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:08,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:08,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:56:08,043 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:93, output treesize:79 [2021-03-10 21:56:08,186 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-03-10 21:56:08,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:08,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:08,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:08,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:08,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:08,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:08,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:56:08,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:08,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:08,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:08,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:56:08,212 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:08,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:08,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:08,220 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:08,371 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 21:56:08,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:08,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:08,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:08,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:56:08,382 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:08,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:08,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:08,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:56:08,392 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:08,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:08,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:08,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:56:08,403 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:08,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:08,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:56:08,412 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:08,551 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 21:56:08,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:08,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:56:08,554 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:69 [2021-03-10 21:56:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:08,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:08,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:56:08,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123333743] [2021-03-10 21:56:08,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:56:08,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:08,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:56:08,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:56:08,830 INFO L87 Difference]: Start difference. First operand 1397 states and 4684 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:09,493 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-03-10 21:56:09,868 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-10 21:56:10,743 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 21:56:10,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:10,750 INFO L93 Difference]: Finished difference Result 1624 states and 5332 transitions. [2021-03-10 21:56:10,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:56:10,752 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:56:10,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:10,755 INFO L225 Difference]: With dead ends: 1624 [2021-03-10 21:56:10,755 INFO L226 Difference]: Without dead ends: 1558 [2021-03-10 21:56:10,756 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1693.6ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:56:10,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2021-03-10 21:56:10,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1400. [2021-03-10 21:56:10,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 3.355253752680486) internal successors, (4694), 1399 states have internal predecessors, (4694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:10,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4694 transitions. [2021-03-10 21:56:10,772 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4694 transitions. Word has length 24 [2021-03-10 21:56:10,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:10,772 INFO L480 AbstractCegarLoop]: Abstraction has 1400 states and 4694 transitions. [2021-03-10 21:56:10,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:10,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4694 transitions. [2021-03-10 21:56:10,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:56:10,774 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:10,774 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:10,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1419 [2021-03-10 21:56:10,974 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:10,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:10,975 INFO L82 PathProgramCache]: Analyzing trace with hash 661192566, now seen corresponding path program 183 times [2021-03-10 21:56:10,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:10,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103460738] [2021-03-10 21:56:10,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:11,313 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 21:56:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:11,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103460738] [2021-03-10 21:56:11,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397226197] [2021-03-10 21:56:11,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:11,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:56:11,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:11,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:56:11,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:11,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:11,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:11,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:11,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:11,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:11,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:11,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:11,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:11,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:56:11,902 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-03-10 21:56:12,074 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-03-10 21:56:12,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:12,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:12,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:12,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:12,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:12,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:12,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:12,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:12,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:12,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:12,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:56:12,101 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:12,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:12,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:56:12,109 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:12,260 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 21:56:12,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:12,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:12,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:12,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:56:12,272 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:12,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:12,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:12,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:56:12,282 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:12,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:12,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:12,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:56:12,293 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:12,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:12,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:56:12,303 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:12,447 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 21:56:12,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:12,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:56:12,450 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:75 [2021-03-10 21:56:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:12,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:12,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:56:12,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691162699] [2021-03-10 21:56:12,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:56:12,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:12,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:56:12,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:56:12,808 INFO L87 Difference]: Start difference. First operand 1400 states and 4694 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:13,404 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2021-03-10 21:56:13,849 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-03-10 21:56:14,005 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 21:56:14,231 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 21:56:14,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:14,329 INFO L93 Difference]: Finished difference Result 1565 states and 5120 transitions. [2021-03-10 21:56:14,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:56:14,330 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:56:14,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:14,333 INFO L225 Difference]: With dead ends: 1565 [2021-03-10 21:56:14,333 INFO L226 Difference]: Without dead ends: 1534 [2021-03-10 21:56:14,333 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1746.8ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:56:14,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-03-10 21:56:14,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1399. [2021-03-10 21:56:14,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 3.3540772532188843) internal successors, (4689), 1398 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:14,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 4689 transitions. [2021-03-10 21:56:14,350 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 4689 transitions. Word has length 24 [2021-03-10 21:56:14,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:14,350 INFO L480 AbstractCegarLoop]: Abstraction has 1399 states and 4689 transitions. [2021-03-10 21:56:14,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:14,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 4689 transitions. [2021-03-10 21:56:14,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:56:14,352 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:14,352 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:14,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1425,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:14,552 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:14,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:14,552 INFO L82 PathProgramCache]: Analyzing trace with hash -839302772, now seen corresponding path program 184 times [2021-03-10 21:56:14,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:14,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964836895] [2021-03-10 21:56:14,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:15,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964836895] [2021-03-10 21:56:15,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483869586] [2021-03-10 21:56:15,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:15,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:56:15,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:15,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:56:15,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:15,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:15,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:15,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:15,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:15,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:15,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:15,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:15,541 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 21:56:15,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:15,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:15,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:15,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:15,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:15,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:15,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:15,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:15,724 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 21:56:15,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:15,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:56:15,730 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-03-10 21:56:16,139 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-03-10 21:56:16,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:16,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:16,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:16,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:16,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:16,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:16,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:56:16,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:16,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:16,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:16,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:56:16,172 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:16,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:16,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:16,182 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:16,448 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 21:56:16,449 INFO L628 ElimStorePlain]: treesize reduction 57, result has 65.2 percent of original size [2021-03-10 21:56:16,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:16,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:16,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:56:16,459 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:16,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:16,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:56:16,468 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:16,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:16,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:56:16,570 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:189, output treesize:47 [2021-03-10 21:56:16,769 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:16,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:16,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:56:16,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760531506] [2021-03-10 21:56:16,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:56:16,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:16,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:56:16,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:56:16,771 INFO L87 Difference]: Start difference. First operand 1399 states and 4689 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:17,303 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2021-03-10 21:56:17,649 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 52 [2021-03-10 21:56:18,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:18,009 INFO L93 Difference]: Finished difference Result 1551 states and 5074 transitions. [2021-03-10 21:56:18,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:56:18,011 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:56:18,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:18,013 INFO L225 Difference]: With dead ends: 1551 [2021-03-10 21:56:18,013 INFO L226 Difference]: Without dead ends: 1474 [2021-03-10 21:56:18,013 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1574.7ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:56:18,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2021-03-10 21:56:18,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1397. [2021-03-10 21:56:18,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 3.355300859598854) internal successors, (4684), 1396 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:18,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 4684 transitions. [2021-03-10 21:56:18,028 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 4684 transitions. Word has length 24 [2021-03-10 21:56:18,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:18,028 INFO L480 AbstractCegarLoop]: Abstraction has 1397 states and 4684 transitions. [2021-03-10 21:56:18,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:18,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 4684 transitions. [2021-03-10 21:56:18,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:56:18,030 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:18,030 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:18,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1437 [2021-03-10 21:56:18,231 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:18,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:18,231 INFO L82 PathProgramCache]: Analyzing trace with hash 979223708, now seen corresponding path program 185 times [2021-03-10 21:56:18,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:18,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311905837] [2021-03-10 21:56:18,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:18,581 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 21:56:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:18,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311905837] [2021-03-10 21:56:18,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589402776] [2021-03-10 21:56:18,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:18,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:56:18,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:18,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:56:18,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:18,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:56:18,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:18,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:56:18,937 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:18,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:56:18,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:18,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:56:18,954 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:19,066 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 21:56:19,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:19,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:56:19,071 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-03-10 21:56:19,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:19,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:19,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:56:19,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:19,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:19,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:56:19,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:19,748 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-03-10 21:56:19,749 INFO L628 ElimStorePlain]: treesize reduction 165, result has 52.7 percent of original size [2021-03-10 21:56:19,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:19,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:19,758 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:19,938 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 21:56:19,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:19,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:19,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:56:19,949 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:20,129 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 21:56:20,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:20,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:20,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:20,137 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:20,301 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 21:56:20,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:20,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:20,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:56:20,311 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:20,475 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-10 21:56:20,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:20,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:56:20,484 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:20,648 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 21:56:20,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:20,649 INFO L518 ElimStorePlain]: Eliminatee v_prenex_771 vanished before elimination [2021-03-10 21:56:20,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:20,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:56:20,659 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:20,812 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-10 21:56:20,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:20,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:56:20,815 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-03-10 21:56:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:21,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:21,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:56:21,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694386387] [2021-03-10 21:56:21,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:56:21,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:21,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:56:21,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:56:21,175 INFO L87 Difference]: Start difference. First operand 1397 states and 4684 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:21,823 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-10 21:56:21,988 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-10 21:56:22,209 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-03-10 21:56:22,557 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-03-10 21:56:22,806 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-10 21:56:23,153 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-03-10 21:56:23,486 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-03-10 21:56:23,800 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-03-10 21:56:24,081 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-03-10 21:56:24,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:24,082 INFO L93 Difference]: Finished difference Result 1831 states and 5887 transitions. [2021-03-10 21:56:24,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:56:24,083 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:56:24,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:24,086 INFO L225 Difference]: With dead ends: 1831 [2021-03-10 21:56:24,086 INFO L226 Difference]: Without dead ends: 1720 [2021-03-10 21:56:24,086 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2896.2ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:56:24,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1720 states. [2021-03-10 21:56:24,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1720 to 1407. [2021-03-10 21:56:24,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 1406 states have (on average 3.357041251778094) internal successors, (4720), 1406 states have internal predecessors, (4720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:24,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 4720 transitions. [2021-03-10 21:56:24,104 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 4720 transitions. Word has length 24 [2021-03-10 21:56:24,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:24,104 INFO L480 AbstractCegarLoop]: Abstraction has 1407 states and 4720 transitions. [2021-03-10 21:56:24,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:24,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 4720 transitions. [2021-03-10 21:56:24,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:56:24,105 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:24,106 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:24,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1446,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:24,306 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:24,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:24,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1506357922, now seen corresponding path program 186 times [2021-03-10 21:56:24,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:24,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829243989] [2021-03-10 21:56:24,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:24,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829243989] [2021-03-10 21:56:24,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782159141] [2021-03-10 21:56:24,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:24,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:56:24,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:24,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:56:24,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:24,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:56:24,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:24,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:56:24,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:24,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:56:24,927 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:24,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:56:24,933 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:25,035 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 21:56:25,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:25,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:56:25,040 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-03-10 21:56:25,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:25,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:25,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:25,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:25,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:25,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:25,272 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:25,745 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2021-03-10 21:56:25,746 INFO L628 ElimStorePlain]: treesize reduction 156, result has 55.3 percent of original size [2021-03-10 21:56:25,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:25,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:25,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:25,933 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 21:56:25,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:25,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:56:25,942 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:26,136 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 21:56:26,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:26,137 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:56:26,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:26,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:56:26,146 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:26,329 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-10 21:56:26,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:26,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:56:26,338 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:26,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:26,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:56:26,347 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:26,534 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-10 21:56:26,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:26,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:26,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:56:26,546 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:26,724 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 21:56:26,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:26,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:26,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:56:26,735 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:26,888 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-10 21:56:26,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:26,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:56:26,892 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-03-10 21:56:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:27,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:27,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:56:27,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313399533] [2021-03-10 21:56:27,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:56:27,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:27,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:56:27,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:56:27,231 INFO L87 Difference]: Start difference. First operand 1407 states and 4720 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:28,228 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-10 21:56:28,795 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-10 21:56:28,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:28,818 INFO L93 Difference]: Finished difference Result 1904 states and 6123 transitions. [2021-03-10 21:56:28,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:56:28,820 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:56:28,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:28,823 INFO L225 Difference]: With dead ends: 1904 [2021-03-10 21:56:28,823 INFO L226 Difference]: Without dead ends: 1805 [2021-03-10 21:56:28,823 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1522.5ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:56:28,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2021-03-10 21:56:28,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1409. [2021-03-10 21:56:28,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.3636363636363638) internal successors, (4736), 1408 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) [2021-03-10 21:56:28,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4736 transitions. [2021-03-10 21:56:28,840 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4736 transitions. Word has length 24 [2021-03-10 21:56:28,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:28,840 INFO L480 AbstractCegarLoop]: Abstraction has 1409 states and 4736 transitions. [2021-03-10 21:56:28,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4736 transitions. [2021-03-10 21:56:28,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:56:28,842 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:28,842 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:29,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1453 [2021-03-10 21:56:29,042 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:29,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:29,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1753428078, now seen corresponding path program 187 times [2021-03-10 21:56:29,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:29,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12129940] [2021-03-10 21:56:29,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:29,512 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-10 21:56:29,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:29,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12129940] [2021-03-10 21:56:29,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894491635] [2021-03-10 21:56:29,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:29,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:56:29,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:29,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:56:29,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:29,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:56:29,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:29,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:56:29,863 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:29,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:56:29,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:29,985 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 21:56:29,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:29,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:56:29,991 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-03-10 21:56:30,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:30,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:30,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:30,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:30,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:30,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:30,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:30,517 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-10 21:56:30,517 INFO L628 ElimStorePlain]: treesize reduction 86, result has 45.9 percent of original size [2021-03-10 21:56:30,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:30,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:56:30,527 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:30,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:30,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:30,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:30,614 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:30,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:30,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:30,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:56:30,696 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:30,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:30,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:56:30,760 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:34 [2021-03-10 21:56:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:30,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:30,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:56:30,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913043921] [2021-03-10 21:56:30,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:56:30,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:30,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:56:30,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:56:30,980 INFO L87 Difference]: Start difference. First operand 1409 states and 4736 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:31,752 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-03-10 21:56:32,042 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-03-10 21:56:32,219 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-03-10 21:56:32,499 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-03-10 21:56:32,837 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-10 21:56:32,986 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-03-10 21:56:33,175 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-03-10 21:56:33,415 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2021-03-10 21:56:33,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:33,789 INFO L93 Difference]: Finished difference Result 2172 states and 6737 transitions. [2021-03-10 21:56:33,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:56:33,791 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:56:33,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:33,794 INFO L225 Difference]: With dead ends: 2172 [2021-03-10 21:56:33,794 INFO L226 Difference]: Without dead ends: 1971 [2021-03-10 21:56:33,794 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2909.3ms TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:56:33,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-03-10 21:56:33,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1397. [2021-03-10 21:56:33,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 3.358166189111748) internal successors, (4688), 1396 states have internal predecessors, (4688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:33,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 4688 transitions. [2021-03-10 21:56:33,813 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 4688 transitions. Word has length 24 [2021-03-10 21:56:33,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:33,813 INFO L480 AbstractCegarLoop]: Abstraction has 1397 states and 4688 transitions. [2021-03-10 21:56:33,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:33,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 4688 transitions. [2021-03-10 21:56:33,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:56:33,815 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:33,815 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:34,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1460,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:34,016 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:34,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:34,016 INFO L82 PathProgramCache]: Analyzing trace with hash 252028874, now seen corresponding path program 188 times [2021-03-10 21:56:34,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:34,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596909012] [2021-03-10 21:56:34,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:34,399 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-03-10 21:56:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:34,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596909012] [2021-03-10 21:56:34,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25912790] [2021-03-10 21:56:34,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:34,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:56:34,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:34,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:56:34,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:34,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:56:34,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:34,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:56:34,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:34,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:34,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:56:34,790 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:47 [2021-03-10 21:56:34,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:34,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:34,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:56:34,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:34,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:34,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:56:35,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:35,142 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 21:56:35,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:35,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:35,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:35,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:56:35,154 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:35,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:35,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:56:35,164 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:35,304 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 21:56:35,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:35,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:35,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:35,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:35,314 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:35,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:35,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:35,322 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:35,464 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 21:56:35,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:35,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:35,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:35,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:56:35,476 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:35,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:35,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:56:35,486 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:35,600 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 21:56:35,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:35,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:56:35,604 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:161, output treesize:69 [2021-03-10 21:56:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:35,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:35,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:56:35,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235023688] [2021-03-10 21:56:35,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:56:35,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:35,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:56:35,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:56:35,924 INFO L87 Difference]: Start difference. First operand 1397 states and 4688 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:36,310 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-03-10 21:56:36,640 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-03-10 21:56:37,001 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-03-10 21:56:37,188 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-10 21:56:37,402 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-03-10 21:56:37,627 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2021-03-10 21:56:37,805 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-03-10 21:56:38,029 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-03-10 21:56:38,176 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 21:56:38,320 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-03-10 21:56:38,598 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-10 21:56:39,156 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-03-10 21:56:39,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:39,169 INFO L93 Difference]: Finished difference Result 2011 states and 6517 transitions. [2021-03-10 21:56:39,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:56:39,171 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:56:39,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:39,174 INFO L225 Difference]: With dead ends: 2011 [2021-03-10 21:56:39,174 INFO L226 Difference]: Without dead ends: 1945 [2021-03-10 21:56:39,175 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 3274.5ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:56:39,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-03-10 21:56:39,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1425. [2021-03-10 21:56:39,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 3.368679775280899) internal successors, (4797), 1424 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:39,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 4797 transitions. [2021-03-10 21:56:39,193 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 4797 transitions. Word has length 24 [2021-03-10 21:56:39,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:39,193 INFO L480 AbstractCegarLoop]: Abstraction has 1425 states and 4797 transitions. [2021-03-10 21:56:39,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:39,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 4797 transitions. [2021-03-10 21:56:39,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:56:39,195 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:39,195 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:39,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1467,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:39,396 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:39,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:39,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1851619338, now seen corresponding path program 189 times [2021-03-10 21:56:39,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:39,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877045959] [2021-03-10 21:56:39,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:39,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877045959] [2021-03-10 21:56:39,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959833837] [2021-03-10 21:56:39,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:39,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:56:39,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:39,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:56:39,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:39,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:56:39,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:39,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:56:39,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:39,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:56:39,925 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:39,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:56:39,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:40,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:40,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:56:40,007 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-03-10 21:56:40,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:56:40,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:40,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:40,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:40,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:40,242 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:40,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:40,249 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:40,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:56:40,256 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:40,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:56:40,263 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:40,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:56:40,270 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:40,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:40,276 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:40,532 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 21:56:40,532 INFO L628 ElimStorePlain]: treesize reduction 121, result has 49.8 percent of original size [2021-03-10 21:56:40,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:56:40,542 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:40,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:56:40,550 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:40,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:56:40,559 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:40,676 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:56:40,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:40,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:56:40,679 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:297, output treesize:96 [2021-03-10 21:56:40,815 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 21:56:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:41,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:41,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:56:41,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863245756] [2021-03-10 21:56:41,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:56:41,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:41,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:56:41,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:56:41,020 INFO L87 Difference]: Start difference. First operand 1425 states and 4797 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:41,676 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 21:56:41,975 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-10 21:56:42,200 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-10 21:56:42,359 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-03-10 21:56:42,582 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-03-10 21:56:42,856 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-10 21:56:42,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:42,946 INFO L93 Difference]: Finished difference Result 2003 states and 6431 transitions. [2021-03-10 21:56:42,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:56:42,948 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:56:42,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:42,952 INFO L225 Difference]: With dead ends: 2003 [2021-03-10 21:56:42,952 INFO L226 Difference]: Without dead ends: 1916 [2021-03-10 21:56:42,952 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 2101.6ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:56:42,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2021-03-10 21:56:42,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1423. [2021-03-10 21:56:42,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 3.369901547116737) internal successors, (4792), 1422 states have internal predecessors, (4792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:42,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 4792 transitions. [2021-03-10 21:56:42,971 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 4792 transitions. Word has length 24 [2021-03-10 21:56:42,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:42,971 INFO L480 AbstractCegarLoop]: Abstraction has 1423 states and 4792 transitions. [2021-03-10 21:56:42,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:42,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 4792 transitions. [2021-03-10 21:56:42,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:56:42,973 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:42,973 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:43,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1474 [2021-03-10 21:56:43,173 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:43,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:43,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1026233244, now seen corresponding path program 190 times [2021-03-10 21:56:43,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:43,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84891703] [2021-03-10 21:56:43,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:43,651 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-10 21:56:43,821 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:43,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84891703] [2021-03-10 21:56:43,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307587259] [2021-03-10 21:56:43,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:43,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:56:43,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:43,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:56:43,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:44,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:56:44,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:44,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:56:44,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:44,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:56:44,018 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:44,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:56:44,024 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:44,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:44,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:56:44,126 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-03-10 21:56:44,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:44,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:44,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:44,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:44,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:44,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:44,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:44,772 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-10 21:56:44,773 INFO L628 ElimStorePlain]: treesize reduction 86, result has 45.9 percent of original size [2021-03-10 21:56:44,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:44,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:56:44,783 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:44,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:44,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:44,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:44,862 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:44,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:44,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:44,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:56:44,938 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:45,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:45,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:56:45,018 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:34 [2021-03-10 21:56:45,243 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:45,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:45,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:56:45,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141892367] [2021-03-10 21:56:45,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:56:45,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:45,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:56:45,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:56:45,244 INFO L87 Difference]: Start difference. First operand 1423 states and 4792 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:46,015 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-10 21:56:46,264 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-10 21:56:46,530 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-03-10 21:56:46,810 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-03-10 21:56:46,962 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-03-10 21:56:47,215 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 21:56:47,461 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-10 21:56:47,677 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-10 21:56:48,001 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-03-10 21:56:48,187 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-03-10 21:56:48,475 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-03-10 21:56:48,706 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-10 21:56:48,931 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-10 21:56:49,142 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-03-10 21:56:49,629 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-03-10 21:56:49,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:49,656 INFO L93 Difference]: Finished difference Result 2310 states and 7358 transitions. [2021-03-10 21:56:49,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:56:49,658 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:56:49,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:49,663 INFO L225 Difference]: With dead ends: 2310 [2021-03-10 21:56:49,663 INFO L226 Difference]: Without dead ends: 2167 [2021-03-10 21:56:49,663 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 4303.5ms TimeCoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:56:49,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2021-03-10 21:56:49,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 1427. [2021-03-10 21:56:49,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1426 states have (on average 3.373772791023843) internal successors, (4811), 1426 states have internal predecessors, (4811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:49,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 4811 transitions. [2021-03-10 21:56:49,684 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 4811 transitions. Word has length 24 [2021-03-10 21:56:49,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:49,684 INFO L480 AbstractCegarLoop]: Abstraction has 1427 states and 4811 transitions. [2021-03-10 21:56:49,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:49,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 4811 transitions. [2021-03-10 21:56:49,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:56:49,686 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:49,686 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:49,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1479,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:49,887 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:49,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:49,887 INFO L82 PathProgramCache]: Analyzing trace with hash 864228014, now seen corresponding path program 191 times [2021-03-10 21:56:49,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:49,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663494758] [2021-03-10 21:56:49,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:50,387 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-10 21:56:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:50,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663494758] [2021-03-10 21:56:50,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837081115] [2021-03-10 21:56:50,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:50,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:56:50,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:50,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:56:50,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:50,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:56:50,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:50,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:56:50,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:50,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:56:50,719 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:50,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:56:50,726 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:50,831 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 21:56:50,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:50,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:56:50,836 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-03-10 21:56:51,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:51,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:51,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:51,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:51,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:51,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:51,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:51,445 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 21:56:51,446 INFO L628 ElimStorePlain]: treesize reduction 94, result has 40.9 percent of original size [2021-03-10 21:56:51,446 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:56:51,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:51,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:51,456 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:51,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:51,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:51,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:56:51,541 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:51,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:51,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:56:51,611 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:173, output treesize:34 [2021-03-10 21:56:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:51,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:51,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:56:51,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616406605] [2021-03-10 21:56:51,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:56:51,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:51,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:56:51,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:56:51,854 INFO L87 Difference]: Start difference. First operand 1427 states and 4811 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:52,561 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-03-10 21:56:52,885 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-03-10 21:56:53,262 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-03-10 21:56:53,477 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-03-10 21:56:53,711 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 45 [2021-03-10 21:56:53,912 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-03-10 21:56:54,086 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-03-10 21:56:54,263 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 40 [2021-03-10 21:56:54,423 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-03-10 21:56:54,661 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-03-10 21:56:54,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:54,986 INFO L93 Difference]: Finished difference Result 2392 states and 7497 transitions. [2021-03-10 21:56:54,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:56:54,987 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:56:54,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:54,991 INFO L225 Difference]: With dead ends: 2392 [2021-03-10 21:56:54,991 INFO L226 Difference]: Without dead ends: 2191 [2021-03-10 21:56:54,991 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 3110.9ms TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:56:54,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2021-03-10 21:56:55,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 1435. [2021-03-10 21:56:55,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 3.3758716875871686) internal successors, (4841), 1434 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:55,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4841 transitions. [2021-03-10 21:56:55,011 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4841 transitions. Word has length 24 [2021-03-10 21:56:55,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:55,011 INFO L480 AbstractCegarLoop]: Abstraction has 1435 states and 4841 transitions. [2021-03-10 21:56:55,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:55,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4841 transitions. [2021-03-10 21:56:55,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:56:55,013 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:55,013 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:55,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1486,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:55,213 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:55,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:55,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1318679352, now seen corresponding path program 192 times [2021-03-10 21:56:55,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:55,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225305519] [2021-03-10 21:56:55,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:55,348 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 21:56:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:55,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225305519] [2021-03-10 21:56:55,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264795624] [2021-03-10 21:56:55,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:55,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:56:55,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:55,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:56:55,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:55,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-03-10 21:56:55,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:55,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:56:55,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:55,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:55,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:56:55,959 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:33 [2021-03-10 21:56:56,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:56,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:56,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:56,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:56,181 INFO L628 ElimStorePlain]: treesize reduction 29, result has 40.8 percent of original size [2021-03-10 21:56:56,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:56:56,188 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:56,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:56,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:56:56,203 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:63, output treesize:12 [2021-03-10 21:56:56,294 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:56,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:56,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:56:56,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861653248] [2021-03-10 21:56:56,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:56:56,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:56,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:56:56,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:56,295 INFO L87 Difference]: Start difference. First operand 1435 states and 4841 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:57,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:57,174 INFO L93 Difference]: Finished difference Result 1841 states and 5999 transitions. [2021-03-10 21:56:57,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:56:57,176 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:56:57,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:57,178 INFO L225 Difference]: With dead ends: 1841 [2021-03-10 21:56:57,179 INFO L226 Difference]: Without dead ends: 1768 [2021-03-10 21:56:57,179 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1216.1ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:56:57,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-03-10 21:56:57,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1442. [2021-03-10 21:56:57,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.371269951422623) internal successors, (4858), 1441 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:57,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4858 transitions. [2021-03-10 21:56:57,194 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4858 transitions. Word has length 24 [2021-03-10 21:56:57,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:57,194 INFO L480 AbstractCegarLoop]: Abstraction has 1442 states and 4858 transitions. [2021-03-10 21:56:57,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:57,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4858 transitions. [2021-03-10 21:56:57,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:56:57,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:57,196 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:57,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1493,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:57,396 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:57,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:57,397 INFO L82 PathProgramCache]: Analyzing trace with hash 874027726, now seen corresponding path program 193 times [2021-03-10 21:56:57,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:57,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575888211] [2021-03-10 21:56:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:57,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575888211] [2021-03-10 21:56:57,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046775263] [2021-03-10 21:56:57,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:57,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:56:57,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:58,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-03-10 21:56:58,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:58,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:56:58,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:58,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:58,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:56:58,130 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:33 [2021-03-10 21:56:58,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:58,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:58,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:56:58,345 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:58,389 INFO L628 ElimStorePlain]: treesize reduction 29, result has 40.8 percent of original size [2021-03-10 21:56:58,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:56:58,396 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:58,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:58,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:56:58,412 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:63, output treesize:12 [2021-03-10 21:56:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:56:58,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:58,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:56:58,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185573082] [2021-03-10 21:56:58,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:56:58,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:58,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:56:58,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:58,506 INFO L87 Difference]: Start difference. First operand 1442 states and 4858 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:59,074 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-03-10 21:56:59,451 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-03-10 21:56:59,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:59,532 INFO L93 Difference]: Finished difference Result 1829 states and 5967 transitions. [2021-03-10 21:56:59,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:56:59,534 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:56:59,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:59,537 INFO L225 Difference]: With dead ends: 1829 [2021-03-10 21:56:59,537 INFO L226 Difference]: Without dead ends: 1770 [2021-03-10 21:56:59,537 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1456.8ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:56:59,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2021-03-10 21:56:59,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1442. [2021-03-10 21:56:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.371269951422623) internal successors, (4858), 1441 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:59,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4858 transitions. [2021-03-10 21:56:59,554 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4858 transitions. Word has length 24 [2021-03-10 21:56:59,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:59,554 INFO L480 AbstractCegarLoop]: Abstraction has 1442 states and 4858 transitions. [2021-03-10 21:56:59,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:59,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4858 transitions. [2021-03-10 21:56:59,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:56:59,555 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:59,555 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:59,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1495 [2021-03-10 21:56:59,756 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:59,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:59,756 INFO L82 PathProgramCache]: Analyzing trace with hash -863944090, now seen corresponding path program 194 times [2021-03-10 21:56:59,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:59,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85106186] [2021-03-10 21:56:59,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:00,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85106186] [2021-03-10 21:57:00,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20061087] [2021-03-10 21:57:00,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:00,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:57:00,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:00,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:57:00,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:00,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-03-10 21:57:00,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:00,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:57:00,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:57:00,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:00,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:57:00,182 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:57, output treesize:43 [2021-03-10 21:57:00,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:57:00,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:00,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:57:00,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:00,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:57:00,330 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:00,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:57:00,337 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:00,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:57:00,343 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:00,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:57:00,350 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:00,457 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-03-10 21:57:00,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:00,458 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:57:00,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 21:57:00,460 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:189, output treesize:87 [2021-03-10 21:57:00,597 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-03-10 21:57:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:00,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:00,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:57:00,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763382813] [2021-03-10 21:57:00,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:57:00,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:00,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:57:00,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:57:00,771 INFO L87 Difference]: Start difference. First operand 1442 states and 4858 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:01,633 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 21:57:02,254 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 21:57:02,477 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-03-10 21:57:02,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:02,653 INFO L93 Difference]: Finished difference Result 2149 states and 6936 transitions. [2021-03-10 21:57:02,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:57:02,655 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:57:02,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:02,658 INFO L225 Difference]: With dead ends: 2149 [2021-03-10 21:57:02,658 INFO L226 Difference]: Without dead ends: 2056 [2021-03-10 21:57:02,658 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1621.4ms TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:57:02,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2056 states. [2021-03-10 21:57:02,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2056 to 1479. [2021-03-10 21:57:02,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1479 states, 1478 states have (on average 3.3721244925575102) internal successors, (4984), 1478 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:02,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 4984 transitions. [2021-03-10 21:57:02,677 INFO L78 Accepts]: Start accepts. Automaton has 1479 states and 4984 transitions. Word has length 24 [2021-03-10 21:57:02,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:02,677 INFO L480 AbstractCegarLoop]: Abstraction has 1479 states and 4984 transitions. [2021-03-10 21:57:02,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:02,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1479 states and 4984 transitions. [2021-03-10 21:57:02,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:57:02,679 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:02,679 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:02,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1497 [2021-03-10 21:57:02,879 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:02,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:02,879 INFO L82 PathProgramCache]: Analyzing trace with hash -885262936, now seen corresponding path program 195 times [2021-03-10 21:57:02,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:02,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555048685] [2021-03-10 21:57:02,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:02,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:03,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555048685] [2021-03-10 21:57:03,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308149131] [2021-03-10 21:57:03,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:03,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:57:03,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:03,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:57:03,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:03,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-03-10 21:57:03,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:03,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:57:03,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:03,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:03,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:57:03,673 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:43 [2021-03-10 21:57:03,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:57:03,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:03,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:03,828 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:57:03,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:57:03,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:11 [2021-03-10 21:57:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:03,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:03,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:57:03,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132408136] [2021-03-10 21:57:03,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:57:03,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:03,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:57:03,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:57:03,922 INFO L87 Difference]: Start difference. First operand 1479 states and 4984 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:04,524 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-10 21:57:04,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:04,845 INFO L93 Difference]: Finished difference Result 1799 states and 5946 transitions. [2021-03-10 21:57:04,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:57:04,847 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:57:04,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:04,850 INFO L225 Difference]: With dead ends: 1799 [2021-03-10 21:57:04,850 INFO L226 Difference]: Without dead ends: 1768 [2021-03-10 21:57:04,851 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1231.1ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:57:04,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-03-10 21:57:04,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1483. [2021-03-10 21:57:04,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 3.3697705802968962) internal successors, (4994), 1482 states have internal predecessors, (4994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:04,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 4994 transitions. [2021-03-10 21:57:04,867 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 4994 transitions. Word has length 24 [2021-03-10 21:57:04,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:04,867 INFO L480 AbstractCegarLoop]: Abstraction has 1483 states and 4994 transitions. [2021-03-10 21:57:04,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:04,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 4994 transitions. [2021-03-10 21:57:04,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:57:04,868 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:04,869 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:05,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1503,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:05,069 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:05,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:05,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1671732544, now seen corresponding path program 196 times [2021-03-10 21:57:05,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:05,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808535103] [2021-03-10 21:57:05,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:05,218 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 21:57:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:05,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808535103] [2021-03-10 21:57:05,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151201857] [2021-03-10 21:57:05,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:05,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:57:05,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:05,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:57:05,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:05,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-03-10 21:57:05,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:05,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:57:05,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:05,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:05,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:57:05,913 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:43 [2021-03-10 21:57:05,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:57:06,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:06,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:57:06,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:06,157 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 21:57:06,158 INFO L628 ElimStorePlain]: treesize reduction 28, result has 71.7 percent of original size [2021-03-10 21:57:06,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:57:06,165 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:06,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:57:06,171 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:06,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:06,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:57:06,241 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:57:06,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:06,302 INFO L518 ElimStorePlain]: Eliminatee v_prenex_799 vanished before elimination [2021-03-10 21:57:06,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:57:06,304 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:141, output treesize:47 [2021-03-10 21:57:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:06,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:06,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:57:06,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544538585] [2021-03-10 21:57:06,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:57:06,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:06,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:57:06,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:57:06,503 INFO L87 Difference]: Start difference. First operand 1483 states and 4994 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:07,074 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-10 21:57:07,391 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-10 21:57:07,763 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-03-10 21:57:08,064 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-10 21:57:08,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:08,248 INFO L93 Difference]: Finished difference Result 1980 states and 6371 transitions. [2021-03-10 21:57:08,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:57:08,249 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:57:08,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:08,253 INFO L225 Difference]: With dead ends: 1980 [2021-03-10 21:57:08,253 INFO L226 Difference]: Without dead ends: 1849 [2021-03-10 21:57:08,253 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2026.5ms TimeCoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:57:08,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2021-03-10 21:57:08,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1497. [2021-03-10 21:57:08,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 3.3643048128342246) internal successors, (5033), 1496 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:08,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 5033 transitions. [2021-03-10 21:57:08,280 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 5033 transitions. Word has length 24 [2021-03-10 21:57:08,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:08,280 INFO L480 AbstractCegarLoop]: Abstraction has 1497 states and 5033 transitions. [2021-03-10 21:57:08,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:08,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 5033 transitions. [2021-03-10 21:57:08,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:57:08,282 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:08,282 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:08,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1505 [2021-03-10 21:57:08,482 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:08,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:08,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1134239688, now seen corresponding path program 197 times [2021-03-10 21:57:08,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:08,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735305849] [2021-03-10 21:57:08,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:08,613 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 21:57:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:09,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735305849] [2021-03-10 21:57:09,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423761040] [2021-03-10 21:57:09,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:09,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:57:09,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:09,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:57:09,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:09,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:57:09,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:09,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:57:09,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:09,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:09,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:57:09,280 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:77, output treesize:61 [2021-03-10 21:57:09,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:09,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2021-03-10 21:57:09,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:09,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:09,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2021-03-10 21:57:09,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:57:09,453 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-10 21:57:09,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 31 [2021-03-10 21:57:09,456 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:09,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:09,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-03-10 21:57:09,474 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:57:09,706 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 21:57:09,706 INFO L628 ElimStorePlain]: treesize reduction 21, result has 84.0 percent of original size [2021-03-10 21:57:09,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:57:09,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:57:09,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-03-10 21:57:09,716 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:57:09,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:09,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:57:09,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-03-10 21:57:09,735 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:57:09,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:09,851 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 21:57:09,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:09,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:57:09,854 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:173, output treesize:90 [2021-03-10 21:57:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:10,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:10,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 22 [2021-03-10 21:57:10,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063055221] [2021-03-10 21:57:10,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:57:10,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:10,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:57:10,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:57:10,404 INFO L87 Difference]: Start difference. First operand 1497 states and 5033 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 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) [2021-03-10 21:57:11,439 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2021-03-10 21:57:11,639 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 21:57:12,158 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-03-10 21:57:12,641 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-03-10 21:57:12,843 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2021-03-10 21:57:13,222 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-03-10 21:57:13,435 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2021-03-10 21:57:13,821 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-03-10 21:57:14,062 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2021-03-10 21:57:14,342 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-03-10 21:57:14,543 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2021-03-10 21:57:14,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:14,670 INFO L93 Difference]: Finished difference Result 2019 states and 6464 transitions. [2021-03-10 21:57:14,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:57:14,671 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 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 24 [2021-03-10 21:57:14,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:14,674 INFO L225 Difference]: With dead ends: 2019 [2021-03-10 21:57:14,674 INFO L226 Difference]: Without dead ends: 1923 [2021-03-10 21:57:14,674 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 4513.8ms TimeCoverageRelationStatistics Valid=336, Invalid=1224, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:57:14,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2021-03-10 21:57:14,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1499. [2021-03-10 21:57:14,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 3.363150867823765) internal successors, (5038), 1498 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:14,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 5038 transitions. [2021-03-10 21:57:14,691 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 5038 transitions. Word has length 24 [2021-03-10 21:57:14,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:14,691 INFO L480 AbstractCegarLoop]: Abstraction has 1499 states and 5038 transitions. [2021-03-10 21:57:14,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 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) [2021-03-10 21:57:14,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 5038 transitions. [2021-03-10 21:57:14,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:57:14,692 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:14,692 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:14,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1509,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:14,893 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:14,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:14,893 INFO L82 PathProgramCache]: Analyzing trace with hash -2019822032, now seen corresponding path program 198 times [2021-03-10 21:57:14,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:14,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931811575] [2021-03-10 21:57:14,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:15,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931811575] [2021-03-10 21:57:15,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266315788] [2021-03-10 21:57:15,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:15,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:57:15,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:15,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:57:15,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:15,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:57:15,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:15,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:57:15,609 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:15,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:15,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:57:15,642 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:45, output treesize:31 [2021-03-10 21:57:15,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:57:15,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:15,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:57:15,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:15,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:15,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:57:15,830 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:57:15,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:57:15,838 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:57:15,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:15,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:57:15,872 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:55, output treesize:25 [2021-03-10 21:57:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:16,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:16,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:16,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316280774] [2021-03-10 21:57:16,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:16,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:16,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:16,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:16,001 INFO L87 Difference]: Start difference. First operand 1499 states and 5038 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:16,954 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 21:57:17,171 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-03-10 21:57:17,674 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 21:57:18,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:18,007 INFO L93 Difference]: Finished difference Result 1922 states and 6314 transitions. [2021-03-10 21:57:18,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:57:18,008 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:57:18,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:18,012 INFO L225 Difference]: With dead ends: 1922 [2021-03-10 21:57:18,012 INFO L226 Difference]: Without dead ends: 1863 [2021-03-10 21:57:18,012 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1938.3ms TimeCoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:57:18,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2021-03-10 21:57:18,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1504. [2021-03-10 21:57:18,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1503 states have (on average 3.363273453093812) internal successors, (5055), 1503 states have internal predecessors, (5055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:18,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 5055 transitions. [2021-03-10 21:57:18,029 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 5055 transitions. Word has length 24 [2021-03-10 21:57:18,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:18,029 INFO L480 AbstractCegarLoop]: Abstraction has 1504 states and 5055 transitions. [2021-03-10 21:57:18,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:18,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 5055 transitions. [2021-03-10 21:57:18,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:57:18,031 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:18,031 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:18,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1517,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:18,231 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:18,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:18,231 INFO L82 PathProgramCache]: Analyzing trace with hash 537173448, now seen corresponding path program 199 times [2021-03-10 21:57:18,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:18,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190758818] [2021-03-10 21:57:18,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:18,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190758818] [2021-03-10 21:57:18,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285295299] [2021-03-10 21:57:18,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:18,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:57:18,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:18,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:57:18,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:18,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:57:18,890 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:18,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-03-10 21:57:18,898 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:57:18,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-03-10 21:57:18,906 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:57:19,115 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 21:57:19,116 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.2 percent of original size [2021-03-10 21:57:19,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:57:19,118 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:161, output treesize:135 [2021-03-10 21:57:19,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:57:19,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:19,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:57:19,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:19,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:57:19,320 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:19,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:57:19,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:19,763 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-03-10 21:57:19,764 INFO L628 ElimStorePlain]: treesize reduction 173, result has 55.1 percent of original size [2021-03-10 21:57:19,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:57:19,772 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:19,957 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 21:57:19,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:19,958 INFO L518 ElimStorePlain]: Eliminatee v_prenex_802 vanished before elimination [2021-03-10 21:57:19,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:57:19,968 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:20,145 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 21:57:20,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:20,145 INFO L518 ElimStorePlain]: Eliminatee v_prenex_804 vanished before elimination [2021-03-10 21:57:20,145 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:57:20,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:57:20,153 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:20,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:57:20,161 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:20,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:57:20,168 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:20,330 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 21:57:20,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:20,331 INFO L518 ElimStorePlain]: Eliminatee v_prenex_806 vanished before elimination [2021-03-10 21:57:20,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 21:57:20,333 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 8 variables, input treesize:445, output treesize:121 [2021-03-10 21:57:20,530 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 21:57:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:20,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:20,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 21:57:20,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419490647] [2021-03-10 21:57:20,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:57:20,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:20,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:57:20,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:57:20,692 INFO L87 Difference]: Start difference. First operand 1504 states and 5055 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:21,535 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-03-10 21:57:21,878 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-03-10 21:57:22,045 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-03-10 21:57:22,222 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-03-10 21:57:22,421 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2021-03-10 21:57:22,558 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-03-10 21:57:22,811 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-03-10 21:57:23,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:23,009 INFO L93 Difference]: Finished difference Result 2058 states and 6547 transitions. [2021-03-10 21:57:23,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:57:23,011 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:57:23,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:23,014 INFO L225 Difference]: With dead ends: 2058 [2021-03-10 21:57:23,014 INFO L226 Difference]: Without dead ends: 1896 [2021-03-10 21:57:23,014 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2666.8ms TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:57:23,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-03-10 21:57:23,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1510. [2021-03-10 21:57:23,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 3.3585155732273027) internal successors, (5068), 1509 states have internal predecessors, (5068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:23,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 5068 transitions. [2021-03-10 21:57:23,033 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 5068 transitions. Word has length 24 [2021-03-10 21:57:23,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:23,033 INFO L480 AbstractCegarLoop]: Abstraction has 1510 states and 5068 transitions. [2021-03-10 21:57:23,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:23,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 5068 transitions. [2021-03-10 21:57:23,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:57:23,035 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:23,035 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:23,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1521 [2021-03-10 21:57:23,235 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:23,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:23,235 INFO L82 PathProgramCache]: Analyzing trace with hash -319408, now seen corresponding path program 200 times [2021-03-10 21:57:23,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:23,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901304633] [2021-03-10 21:57:23,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:23,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901304633] [2021-03-10 21:57:23,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002550746] [2021-03-10 21:57:23,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:23,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:57:23,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:23,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:57:23,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:23,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:57:23,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:23,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:57:23,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:23,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:23,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:57:23,949 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-03-10 21:57:24,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:57:24,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:24,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:57:24,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:24,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:24,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:57:24,153 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:57:24,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:57:24,162 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:57:24,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:24,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:57:24,256 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:24,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:57:24,262 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:24,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:24,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:57:24,341 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:57:24,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:57:24,349 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:57:24,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:24,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:57:24,422 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:117, output treesize:57 [2021-03-10 21:57:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:24,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:24,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:24,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567666262] [2021-03-10 21:57:24,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:24,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:24,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:24,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:24,672 INFO L87 Difference]: Start difference. First operand 1510 states and 5068 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:25,666 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-10 21:57:25,902 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2021-03-10 21:57:26,183 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-03-10 21:57:26,411 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-03-10 21:57:26,606 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 21:57:26,867 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-10 21:57:27,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:27,502 INFO L93 Difference]: Finished difference Result 2000 states and 6520 transitions. [2021-03-10 21:57:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:57:27,504 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:57:27,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:27,507 INFO L225 Difference]: With dead ends: 2000 [2021-03-10 21:57:27,507 INFO L226 Difference]: Without dead ends: 1912 [2021-03-10 21:57:27,508 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 2684.9ms TimeCoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:57:27,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-03-10 21:57:27,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1514. [2021-03-10 21:57:27,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 3.359550561797753) internal successors, (5083), 1513 states have internal predecessors, (5083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:27,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 5083 transitions. [2021-03-10 21:57:27,525 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 5083 transitions. Word has length 24 [2021-03-10 21:57:27,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:27,525 INFO L480 AbstractCegarLoop]: Abstraction has 1514 states and 5083 transitions. [2021-03-10 21:57:27,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:27,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 5083 transitions. [2021-03-10 21:57:27,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:57:27,527 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:27,527 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:27,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1532 [2021-03-10 21:57:27,728 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:27,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:27,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1500814746, now seen corresponding path program 201 times [2021-03-10 21:57:27,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:27,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178125484] [2021-03-10 21:57:27,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:28,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178125484] [2021-03-10 21:57:28,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628226234] [2021-03-10 21:57:28,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:28,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:57:28,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:28,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:57:28,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:28,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:57:28,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:28,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:57:28,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:28,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:57:28,356 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:28,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:57:28,363 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:28,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:28,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:57:28,447 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:169, output treesize:151 [2021-03-10 21:57:28,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:57:28,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 21:57:28,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-03-10 21:57:28,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:57:28,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-03-10 21:57:28,752 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:28,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-03-10 21:57:28,759 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:28,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:57:28,767 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-03-10 21:57:28,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-03-10 21:57:28,775 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:28,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-03-10 21:57:28,783 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:28,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-03-10 21:57:28,791 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-03-10 21:57:29,067 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-03-10 21:57:29,068 INFO L628 ElimStorePlain]: treesize reduction 84, result has 56.5 percent of original size [2021-03-10 21:57:29,068 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-03-10 21:57:29,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:57:29,070 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:373, output treesize:109 [2021-03-10 21:57:29,234 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 21:57:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:29,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:29,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:57:29,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676101243] [2021-03-10 21:57:29,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:57:29,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:29,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:57:29,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:57:29,365 INFO L87 Difference]: Start difference. First operand 1514 states and 5083 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:30,051 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-03-10 21:57:30,318 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-03-10 21:57:30,906 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-03-10 21:57:31,118 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2021-03-10 21:57:31,267 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-03-10 21:57:31,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:31,626 INFO L93 Difference]: Finished difference Result 2097 states and 6667 transitions. [2021-03-10 21:57:31,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:57:31,627 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:57:31,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:31,631 INFO L225 Difference]: With dead ends: 2097 [2021-03-10 21:57:31,631 INFO L226 Difference]: Without dead ends: 1974 [2021-03-10 21:57:31,631 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2566.8ms TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:57:31,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1974 states. [2021-03-10 21:57:31,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1974 to 1516. [2021-03-10 21:57:31,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 3.3584158415841583) internal successors, (5088), 1515 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:31,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 5088 transitions. [2021-03-10 21:57:31,649 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 5088 transitions. Word has length 24 [2021-03-10 21:57:31,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:31,649 INFO L480 AbstractCegarLoop]: Abstraction has 1516 states and 5088 transitions. [2021-03-10 21:57:31,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:31,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 5088 transitions. [2021-03-10 21:57:31,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:57:31,651 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:31,651 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:31,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1537 [2021-03-10 21:57:31,852 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:31,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:31,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1534681898, now seen corresponding path program 202 times [2021-03-10 21:57:31,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:31,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98363167] [2021-03-10 21:57:31,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:32,319 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:32,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98363167] [2021-03-10 21:57:32,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681104634] [2021-03-10 21:57:32,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:32,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:57:32,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:32,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:57:32,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:32,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:57:32,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:32,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:57:32,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:57:32,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-03-10 21:57:32,554 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:57:32,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-03-10 21:57:32,561 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:32,723 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 21:57:32,724 INFO L628 ElimStorePlain]: treesize reduction 9, result has 92.6 percent of original size [2021-03-10 21:57:32,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:57:32,726 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:112 [2021-03-10 21:57:32,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:57:32,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:32,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:57:32,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:32,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:57:32,948 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:32,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:57:32,955 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:33,012 INFO L628 ElimStorePlain]: treesize reduction 62, result has 19.5 percent of original size [2021-03-10 21:57:33,012 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:57:33,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:57:33,013 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:15 [2021-03-10 21:57:33,111 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:33,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:33,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 21:57:33,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566992176] [2021-03-10 21:57:33,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:57:33,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:33,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:57:33,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:57:33,112 INFO L87 Difference]: Start difference. First operand 1516 states and 5088 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:33,630 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-10 21:57:34,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:34,117 INFO L93 Difference]: Finished difference Result 1973 states and 6372 transitions. [2021-03-10 21:57:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:57:34,119 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:57:34,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:34,122 INFO L225 Difference]: With dead ends: 1973 [2021-03-10 21:57:34,122 INFO L226 Difference]: Without dead ends: 1888 [2021-03-10 21:57:34,123 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1365.7ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:57:34,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-03-10 21:57:34,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1518. [2021-03-10 21:57:34,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.3559657218193806) internal successors, (5091), 1517 states have internal predecessors, (5091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:34,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5091 transitions. [2021-03-10 21:57:34,140 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5091 transitions. Word has length 24 [2021-03-10 21:57:34,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:34,140 INFO L480 AbstractCegarLoop]: Abstraction has 1518 states and 5091 transitions. [2021-03-10 21:57:34,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:34,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5091 transitions. [2021-03-10 21:57:34,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:57:34,142 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:34,142 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:34,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1542,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:34,343 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:34,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:34,343 INFO L82 PathProgramCache]: Analyzing trace with hash -567578320, now seen corresponding path program 203 times [2021-03-10 21:57:34,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:34,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362498838] [2021-03-10 21:57:34,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:34,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362498838] [2021-03-10 21:57:34,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130580093] [2021-03-10 21:57:34,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:34,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:57:34,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:34,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:57:34,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:35,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:57:35,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:35,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:57:35,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:57:35,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-03-10 21:57:35,074 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:57:35,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-03-10 21:57:35,082 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:35,249 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 21:57:35,249 INFO L628 ElimStorePlain]: treesize reduction 9, result has 92.6 percent of original size [2021-03-10 21:57:35,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:57:35,251 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:112 [2021-03-10 21:57:35,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:57:35,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:35,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:57:35,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:35,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:57:35,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:35,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:57:35,599 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:35,658 INFO L628 ElimStorePlain]: treesize reduction 62, result has 19.5 percent of original size [2021-03-10 21:57:35,658 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:57:35,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:57:35,660 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:15 [2021-03-10 21:57:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:35,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:35,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:57:35,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480509489] [2021-03-10 21:57:35,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:57:35,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:35,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:57:35,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:57:35,759 INFO L87 Difference]: Start difference. First operand 1518 states and 5091 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:36,371 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-10 21:57:36,674 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-03-10 21:57:37,072 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-03-10 21:57:37,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:37,175 INFO L93 Difference]: Finished difference Result 1943 states and 6283 transitions. [2021-03-10 21:57:37,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:57:37,177 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:57:37,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:37,180 INFO L225 Difference]: With dead ends: 1943 [2021-03-10 21:57:37,180 INFO L226 Difference]: Without dead ends: 1872 [2021-03-10 21:57:37,180 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1786.3ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:57:37,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2021-03-10 21:57:37,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1518. [2021-03-10 21:57:37,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.3559657218193806) internal successors, (5091), 1517 states have internal predecessors, (5091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:37,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5091 transitions. [2021-03-10 21:57:37,196 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5091 transitions. Word has length 24 [2021-03-10 21:57:37,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:37,197 INFO L480 AbstractCegarLoop]: Abstraction has 1518 states and 5091 transitions. [2021-03-10 21:57:37,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:37,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5091 transitions. [2021-03-10 21:57:37,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:57:37,198 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:37,198 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:37,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1547,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:37,399 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:37,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:37,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1968098314, now seen corresponding path program 204 times [2021-03-10 21:57:37,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:37,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340650154] [2021-03-10 21:57:37,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:37,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340650154] [2021-03-10 21:57:37,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666969194] [2021-03-10 21:57:37,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:37,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:57:37,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:37,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:57:37,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:38,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:57:38,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:38,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:57:38,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:38,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:38,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:57:38,166 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:45, output treesize:31 [2021-03-10 21:57:38,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:57:38,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:38,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:57:38,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:38,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:38,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:57:38,354 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:57:38,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:57:38,362 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:57:38,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:38,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:57:38,396 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:55, output treesize:25 [2021-03-10 21:57:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:38,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:38,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:38,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874801716] [2021-03-10 21:57:38,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:38,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:38,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:38,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:38,511 INFO L87 Difference]: Start difference. First operand 1518 states and 5091 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:39,517 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 21:57:39,776 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 21:57:40,375 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 21:57:40,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:40,936 INFO L93 Difference]: Finished difference Result 2049 states and 6641 transitions. [2021-03-10 21:57:40,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:57:40,938 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:57:40,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:40,941 INFO L225 Difference]: With dead ends: 2049 [2021-03-10 21:57:40,941 INFO L226 Difference]: Without dead ends: 1990 [2021-03-10 21:57:40,942 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 2062.6ms TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:57:40,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1990 states. [2021-03-10 21:57:40,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1990 to 1519. [2021-03-10 21:57:40,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 3.3563899868247695) internal successors, (5095), 1518 states have internal predecessors, (5095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:40,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 5095 transitions. [2021-03-10 21:57:40,960 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 5095 transitions. Word has length 24 [2021-03-10 21:57:40,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:40,961 INFO L480 AbstractCegarLoop]: Abstraction has 1519 states and 5095 transitions. [2021-03-10 21:57:40,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:40,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 5095 transitions. [2021-03-10 21:57:40,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:57:40,962 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:40,962 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:41,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1552,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:41,163 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:41,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:41,163 INFO L82 PathProgramCache]: Analyzing trace with hash 230126498, now seen corresponding path program 205 times [2021-03-10 21:57:41,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:41,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998544325] [2021-03-10 21:57:41,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:41,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998544325] [2021-03-10 21:57:41,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706332933] [2021-03-10 21:57:41,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:41,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:57:41,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:41,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:57:41,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:41,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:57:41,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:41,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-03-10 21:57:41,989 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:57:41,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-03-10 21:57:41,997 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:57:42,223 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 21:57:42,224 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.2 percent of original size [2021-03-10 21:57:42,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:57:42,226 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:161, output treesize:135 [2021-03-10 21:57:42,378 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 21:57:42,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:57:42,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:42,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:57:42,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:42,948 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-03-10 21:57:42,949 INFO L628 ElimStorePlain]: treesize reduction 161, result has 58.8 percent of original size [2021-03-10 21:57:42,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:57:42,957 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:43,148 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 21:57:43,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:43,149 INFO L518 ElimStorePlain]: Eliminatee v_prenex_812 vanished before elimination [2021-03-10 21:57:43,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:57:43,157 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:43,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:57:43,164 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:43,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:57:43,171 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:43,336 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 21:57:43,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:43,337 INFO L518 ElimStorePlain]: Eliminatee v_prenex_814 vanished before elimination [2021-03-10 21:57:43,337 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:57:43,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:57:43,345 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:43,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:57:43,353 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:43,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:57:43,360 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:43,526 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 21:57:43,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:43,527 INFO L518 ElimStorePlain]: Eliminatee v_prenex_810 vanished before elimination [2021-03-10 21:57:43,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 21:57:43,530 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 8 variables, input treesize:445, output treesize:121 [2021-03-10 21:57:43,732 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 21:57:43,894 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:43,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:43,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:57:43,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958533055] [2021-03-10 21:57:43,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:57:43,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:43,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:57:43,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:57:43,895 INFO L87 Difference]: Start difference. First operand 1519 states and 5095 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:44,723 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-03-10 21:57:45,186 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-10 21:57:45,363 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-10 21:57:45,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:45,480 INFO L93 Difference]: Finished difference Result 1855 states and 6085 transitions. [2021-03-10 21:57:45,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:57:45,482 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:57:45,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:45,485 INFO L225 Difference]: With dead ends: 1855 [2021-03-10 21:57:45,485 INFO L226 Difference]: Without dead ends: 1806 [2021-03-10 21:57:45,485 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2131.9ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:57:45,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2021-03-10 21:57:45,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1521. [2021-03-10 21:57:45,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 3.3552631578947367) internal successors, (5100), 1520 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:45,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 5100 transitions. [2021-03-10 21:57:45,502 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 5100 transitions. Word has length 24 [2021-03-10 21:57:45,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:45,502 INFO L480 AbstractCegarLoop]: Abstraction has 1521 states and 5100 transitions. [2021-03-10 21:57:45,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:45,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 5100 transitions. [2021-03-10 21:57:45,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:57:45,503 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:45,504 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:45,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1556 [2021-03-10 21:57:45,704 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:45,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:45,704 INFO L82 PathProgramCache]: Analyzing trace with hash -307366358, now seen corresponding path program 206 times [2021-03-10 21:57:45,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:45,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342311393] [2021-03-10 21:57:45,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:46,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342311393] [2021-03-10 21:57:46,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104638569] [2021-03-10 21:57:46,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:46,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:57:46,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:46,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:57:46,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:46,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:57:46,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:46,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:46,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:57:46,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:28 [2021-03-10 21:57:46,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:57:46,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:46,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-03-10 21:57:46,601 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:46,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:46,635 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-03-10 21:57:46,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:57:46,636 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:27 [2021-03-10 21:57:46,836 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:46,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:46,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:57:46,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241049038] [2021-03-10 21:57:46,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:57:46,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:46,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:57:46,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:57:46,837 INFO L87 Difference]: Start difference. First operand 1521 states and 5100 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:47,660 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-10 21:57:47,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:47,958 INFO L93 Difference]: Finished difference Result 1859 states and 6111 transitions. [2021-03-10 21:57:47,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:57:47,960 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:57:47,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:47,963 INFO L225 Difference]: With dead ends: 1859 [2021-03-10 21:57:47,963 INFO L226 Difference]: Without dead ends: 1820 [2021-03-10 21:57:47,963 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1270.8ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:57:47,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2021-03-10 21:57:47,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1521. [2021-03-10 21:57:47,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 3.3552631578947367) internal successors, (5100), 1520 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 5100 transitions. [2021-03-10 21:57:47,980 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 5100 transitions. Word has length 24 [2021-03-10 21:57:47,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:47,980 INFO L480 AbstractCegarLoop]: Abstraction has 1521 states and 5100 transitions. [2021-03-10 21:57:47,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:47,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 5100 transitions. [2021-03-10 21:57:47,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:57:47,982 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:47,982 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:48,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1567 [2021-03-10 21:57:48,183 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:48,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:48,183 INFO L82 PathProgramCache]: Analyzing trace with hash -245285688, now seen corresponding path program 207 times [2021-03-10 21:57:48,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:48,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993900395] [2021-03-10 21:57:48,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:48,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993900395] [2021-03-10 21:57:48,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359449387] [2021-03-10 21:57:48,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:48,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:57:48,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:48,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:57:48,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:48,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:57:48,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:48,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:57:48,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:48,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:57:48,839 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:48,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:57:48,845 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:48,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:48,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:57:48,928 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-03-10 21:57:49,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:57:49,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:49,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:49,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:57:49,298 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:57:49,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:49,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:57:49,311 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:11 [2021-03-10 21:57:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:49,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:49,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:57:49,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316357536] [2021-03-10 21:57:49,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:57:49,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:49,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:57:49,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:57:49,417 INFO L87 Difference]: Start difference. First operand 1521 states and 5100 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:49,764 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 21:57:49,940 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-03-10 21:57:50,073 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 21:57:50,379 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-03-10 21:57:50,660 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-03-10 21:57:50,943 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-10 21:57:51,231 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-03-10 21:57:51,454 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-03-10 21:57:51,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:51,511 INFO L93 Difference]: Finished difference Result 2373 states and 7478 transitions. [2021-03-10 21:57:51,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:57:51,513 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:57:51,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:51,516 INFO L225 Difference]: With dead ends: 2373 [2021-03-10 21:57:51,517 INFO L226 Difference]: Without dead ends: 2315 [2021-03-10 21:57:51,517 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2400.0ms TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:57:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2021-03-10 21:57:51,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 1521. [2021-03-10 21:57:51,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 3.3552631578947367) internal successors, (5100), 1520 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:51,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 5100 transitions. [2021-03-10 21:57:51,536 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 5100 transitions. Word has length 24 [2021-03-10 21:57:51,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:51,536 INFO L480 AbstractCegarLoop]: Abstraction has 1521 states and 5100 transitions. [2021-03-10 21:57:51,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:51,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 5100 transitions. [2021-03-10 21:57:51,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:57:51,538 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:51,538 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:51,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1569,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:51,738 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:51,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:51,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1947421390, now seen corresponding path program 208 times [2021-03-10 21:57:51,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:51,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758273515] [2021-03-10 21:57:51,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:52,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758273515] [2021-03-10 21:57:52,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151101449] [2021-03-10 21:57:52,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:52,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:57:52,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:52,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:57:52,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:52,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:57:52,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:52,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:57:52,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:52,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:57:52,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:52,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:57:52,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:52,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:52,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:57:52,483 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-03-10 21:57:52,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:57:52,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:52,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:57:52,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:52,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:57:52,827 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:52,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:57:52,834 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:52,889 INFO L628 ElimStorePlain]: treesize reduction 62, result has 19.5 percent of original size [2021-03-10 21:57:52,890 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:57:52,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:57:52,891 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:15 [2021-03-10 21:57:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:52,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:52,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:57:52,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802427806] [2021-03-10 21:57:52,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:57:52,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:52,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:57:52,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:57:52,984 INFO L87 Difference]: Start difference. First operand 1521 states and 5100 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2021-03-10 21:57:53,320 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 21:57:53,573 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-03-10 21:57:53,715 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-03-10 21:57:53,942 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-03-10 21:57:54,161 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-03-10 21:57:54,342 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-03-10 21:57:54,671 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 28 [2021-03-10 21:57:54,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:54,804 INFO L93 Difference]: Finished difference Result 2200 states and 7014 transitions. [2021-03-10 21:57:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:57:54,806 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 [2021-03-10 21:57:54,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:54,809 INFO L225 Difference]: With dead ends: 2200 [2021-03-10 21:57:54,809 INFO L226 Difference]: Without dead ends: 2117 [2021-03-10 21:57:54,809 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2126.8ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:57:54,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-03-10 21:57:54,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 1529. [2021-03-10 21:57:54,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.3468586387434556) internal successors, (5114), 1528 states have internal predecessors, (5114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:54,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5114 transitions. [2021-03-10 21:57:54,827 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5114 transitions. Word has length 24 [2021-03-10 21:57:54,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:54,827 INFO L480 AbstractCegarLoop]: Abstraction has 1529 states and 5114 transitions. [2021-03-10 21:57:54,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2021-03-10 21:57:54,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5114 transitions. [2021-03-10 21:57:54,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:57:54,829 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:54,829 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:55,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1573 [2021-03-10 21:57:55,029 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:55,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:55,029 INFO L82 PathProgramCache]: Analyzing trace with hash -949040054, now seen corresponding path program 209 times [2021-03-10 21:57:55,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:55,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544836935] [2021-03-10 21:57:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:55,486 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:55,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544836935] [2021-03-10 21:57:55,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415653443] [2021-03-10 21:57:55,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:55,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:57:55,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:55,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:57:55,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:55,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:57:55,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:55,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:57:55,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:55,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:57:55,670 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:55,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:57:55,676 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:55,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:55,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:57:55,751 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-03-10 21:57:56,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:57:56,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:56,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:57:56,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:56,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:57:56,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:56,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:57:56,036 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:56,091 INFO L628 ElimStorePlain]: treesize reduction 62, result has 19.5 percent of original size [2021-03-10 21:57:56,091 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:57:56,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:57:56,092 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:15 [2021-03-10 21:57:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:56,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:56,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:57:56,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403769974] [2021-03-10 21:57:56,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:57:56,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:56,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:57:56,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:57:56,214 INFO L87 Difference]: Start difference. First operand 1529 states and 5114 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:56,516 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 21:57:57,126 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-03-10 21:57:57,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:57,204 INFO L93 Difference]: Finished difference Result 2194 states and 6995 transitions. [2021-03-10 21:57:57,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:57:57,206 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:57:57,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:57,209 INFO L225 Difference]: With dead ends: 2194 [2021-03-10 21:57:57,209 INFO L226 Difference]: Without dead ends: 2085 [2021-03-10 21:57:57,209 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1381.3ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:57:57,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2021-03-10 21:57:57,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 1516. [2021-03-10 21:57:57,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 3.3544554455445543) internal successors, (5082), 1515 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:57,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 5082 transitions. [2021-03-10 21:57:57,227 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 5082 transitions. Word has length 24 [2021-03-10 21:57:57,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:57,227 INFO L480 AbstractCegarLoop]: Abstraction has 1516 states and 5082 transitions. [2021-03-10 21:57:57,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:57,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 5082 transitions. [2021-03-10 21:57:57,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:57:57,229 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:57,229 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:57,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1578 [2021-03-10 21:57:57,429 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:57,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:57,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1053461368, now seen corresponding path program 210 times [2021-03-10 21:57:57,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:57,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635171081] [2021-03-10 21:57:57,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:57,937 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:57,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635171081] [2021-03-10 21:57:57,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611450862] [2021-03-10 21:57:57,938 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:57,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:57:57,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:57,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:57:57,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:58,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:57:58,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:58,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:57:58,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:58,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:57:58,142 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:58,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:57:58,149 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:58,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:57:58,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:57:58,237 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-03-10 21:57:58,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:57:58,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:58,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:57:58,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:58,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:57:58,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:58,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:57:58,618 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:57:58,716 INFO L628 ElimStorePlain]: treesize reduction 62, result has 19.5 percent of original size [2021-03-10 21:57:58,716 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:57:58,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:57:58,717 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:161, output treesize:15 [2021-03-10 21:57:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:57:58,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:58,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:58,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885307464] [2021-03-10 21:57:58,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:58,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:58,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:58,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:58,839 INFO L87 Difference]: Start difference. First operand 1516 states and 5082 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:59,197 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 21:57:59,993 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-10 21:58:00,168 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-03-10 21:58:00,502 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-03-10 21:58:00,739 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 21:58:00,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:00,846 INFO L93 Difference]: Finished difference Result 2214 states and 7102 transitions. [2021-03-10 21:58:00,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:58:00,848 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:58:00,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:00,851 INFO L225 Difference]: With dead ends: 2214 [2021-03-10 21:58:00,851 INFO L226 Difference]: Without dead ends: 2084 [2021-03-10 21:58:00,851 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 2244.3ms TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:58:00,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2021-03-10 21:58:00,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1509. [2021-03-10 21:58:00,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1509 states, 1508 states have (on average 3.3561007957559683) internal successors, (5061), 1508 states have internal predecessors, (5061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:00,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 5061 transitions. [2021-03-10 21:58:00,881 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 5061 transitions. Word has length 24 [2021-03-10 21:58:00,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:00,881 INFO L480 AbstractCegarLoop]: Abstraction has 1509 states and 5061 transitions. [2021-03-10 21:58:00,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:00,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 5061 transitions. [2021-03-10 21:58:00,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:58:00,883 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:00,883 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:01,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1583 [2021-03-10 21:58:01,084 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:01,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:01,084 INFO L82 PathProgramCache]: Analyzing trace with hash 595992752, now seen corresponding path program 211 times [2021-03-10 21:58:01,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:01,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013546059] [2021-03-10 21:58:01,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:01,253 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 21:58:01,408 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-03-10 21:58:01,567 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-03-10 21:58:01,752 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 21:58:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:58:02,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013546059] [2021-03-10 21:58:02,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358688940] [2021-03-10 21:58:02,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:02,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:58:02,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:02,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:02,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:02,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:58:02,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:02,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:02,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:58:02,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:02,488 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 21:58:02,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:02,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:02,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:02,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:58:02,498 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:02,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:02,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:58:02,506 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:02,631 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 21:58:02,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:02,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:58:02,638 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:141, output treesize:113 [2021-03-10 21:58:03,270 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-03-10 21:58:03,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:03,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:03,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:03,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:03,352 INFO L628 ElimStorePlain]: treesize reduction 35, result has 42.6 percent of original size [2021-03-10 21:58:03,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:03,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:58:03,360 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:58:03,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:03,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:58:03,383 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:12 [2021-03-10 21:58:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:58:03,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:03,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:58:03,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411773786] [2021-03-10 21:58:03,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:58:03,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:03,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:58:03,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:03,490 INFO L87 Difference]: Start difference. First operand 1509 states and 5061 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:03,906 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2021-03-10 21:58:04,169 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-03-10 21:58:04,436 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-03-10 21:58:04,749 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-03-10 21:58:04,984 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2021-03-10 21:58:05,632 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-03-10 21:58:05,838 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-10 21:58:06,100 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-03-10 21:58:06,338 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-03-10 21:58:06,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:06,450 INFO L93 Difference]: Finished difference Result 2171 states and 6947 transitions. [2021-03-10 21:58:06,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:58:06,452 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:58:06,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:06,455 INFO L225 Difference]: With dead ends: 2171 [2021-03-10 21:58:06,456 INFO L226 Difference]: Without dead ends: 2073 [2021-03-10 21:58:06,456 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3747.4ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:58:06,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2021-03-10 21:58:06,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 1507. [2021-03-10 21:58:06,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 3.357237715803453) internal successors, (5056), 1506 states have internal predecessors, (5056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:06,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 5056 transitions. [2021-03-10 21:58:06,474 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 5056 transitions. Word has length 24 [2021-03-10 21:58:06,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:06,474 INFO L480 AbstractCegarLoop]: Abstraction has 1507 states and 5056 transitions. [2021-03-10 21:58:06,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:06,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 5056 transitions. [2021-03-10 21:58:06,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:58:06,475 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:06,476 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:06,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1587 [2021-03-10 21:58:06,676 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:06,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:06,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1635732850, now seen corresponding path program 212 times [2021-03-10 21:58:06,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:06,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107847619] [2021-03-10 21:58:06,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:06,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:58:07,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107847619] [2021-03-10 21:58:07,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563591585] [2021-03-10 21:58:07,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:07,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:58:07,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:07,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:58:07,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:07,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:07,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:07,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:58:07,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:07,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:07,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:58:07,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:07,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:07,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:58:07,412 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:47 [2021-03-10 21:58:07,767 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-03-10 21:58:07,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:07,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:07,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:07,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:07,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:07,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:07,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:07,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:58:07,852 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:58:07,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:07,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:58:07,862 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:58:07,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:07,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:58:07,913 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:25 [2021-03-10 21:58:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:58:08,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:08,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:58:08,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826206422] [2021-03-10 21:58:08,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:58:08,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:08,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:58:08,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:58:08,066 INFO L87 Difference]: Start difference. First operand 1507 states and 5056 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:08,696 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-03-10 21:58:08,969 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-10 21:58:09,189 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2021-03-10 21:58:09,447 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-03-10 21:58:09,917 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-10 21:58:10,118 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2021-03-10 21:58:10,406 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-03-10 21:58:10,656 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2021-03-10 21:58:10,898 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-03-10 21:58:11,197 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-03-10 21:58:11,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:11,560 INFO L93 Difference]: Finished difference Result 2251 states and 7198 transitions. [2021-03-10 21:58:11,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:58:11,562 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:58:11,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:11,565 INFO L225 Difference]: With dead ends: 2251 [2021-03-10 21:58:11,565 INFO L226 Difference]: Without dead ends: 2168 [2021-03-10 21:58:11,566 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 3004.0ms TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:58:11,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2021-03-10 21:58:11,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 1491. [2021-03-10 21:58:11,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1490 states have (on average 3.353020134228188) internal successors, (4996), 1490 states have internal predecessors, (4996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:11,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 4996 transitions. [2021-03-10 21:58:11,584 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 4996 transitions. Word has length 24 [2021-03-10 21:58:11,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:11,584 INFO L480 AbstractCegarLoop]: Abstraction has 1491 states and 4996 transitions. [2021-03-10 21:58:11,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:11,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 4996 transitions. [2021-03-10 21:58:11,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:58:11,585 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:11,585 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:11,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1596,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:11,786 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:11,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:11,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1285511680, now seen corresponding path program 213 times [2021-03-10 21:58:11,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:11,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820848305] [2021-03-10 21:58:11,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:58:12,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820848305] [2021-03-10 21:58:12,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550172191] [2021-03-10 21:58:12,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:12,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:58:12,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:12,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:58:12,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:12,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:12,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:12,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:58:12,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:12,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:12,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-03-10 21:58:12,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:12,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:12,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:58:12,996 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:51 [2021-03-10 21:58:13,143 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_822, o_0], 1=[v_prenex_823, o_4]} [2021-03-10 21:58:13,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:13,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:13,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:13,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:13,432 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-10 21:58:13,433 INFO L628 ElimStorePlain]: treesize reduction 46, result has 67.8 percent of original size [2021-03-10 21:58:13,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:58:13,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:13,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:58:13,447 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:13,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:13,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:13,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:58:13,552 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:58:13,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:13,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:13,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:58:13,655 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:58:13,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:13,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:58:13,753 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:157, output treesize:47 [2021-03-10 21:58:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:58:14,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:14,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:58:14,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470761987] [2021-03-10 21:58:14,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:58:14,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:14,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:58:14,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:14,001 INFO L87 Difference]: Start difference. First operand 1491 states and 4996 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:14,774 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-10 21:58:15,051 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 21:58:15,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:15,289 INFO L93 Difference]: Finished difference Result 1813 states and 5951 transitions. [2021-03-10 21:58:15,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:58:15,291 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:58:15,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:15,294 INFO L225 Difference]: With dead ends: 1813 [2021-03-10 21:58:15,294 INFO L226 Difference]: Without dead ends: 1764 [2021-03-10 21:58:15,294 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1699.3ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:58:15,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2021-03-10 21:58:15,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1493. [2021-03-10 21:58:15,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1493 states, 1492 states have (on average 3.3518766756032172) internal successors, (5001), 1492 states have internal predecessors, (5001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:15,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 5001 transitions. [2021-03-10 21:58:15,309 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 5001 transitions. Word has length 24 [2021-03-10 21:58:15,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:15,310 INFO L480 AbstractCegarLoop]: Abstraction has 1493 states and 5001 transitions. [2021-03-10 21:58:15,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:15,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 5001 transitions. [2021-03-10 21:58:15,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:58:15,311 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:15,311 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:15,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1604,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:15,513 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:15,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:15,513 INFO L82 PathProgramCache]: Analyzing trace with hash 748018824, now seen corresponding path program 214 times [2021-03-10 21:58:15,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:15,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063474363] [2021-03-10 21:58:15,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:15,896 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 21:58:16,060 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-03-10 21:58:16,219 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-03-10 21:58:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:58:16,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063474363] [2021-03-10 21:58:16,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702421712] [2021-03-10 21:58:16,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:16,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:58:16,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:16,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:58:16,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:16,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:16,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:16,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:16,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:16,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:16,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:16,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:16,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:16,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:58:16,851 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:67 [2021-03-10 21:58:17,032 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_826], 1=[o_2, v_prenex_827]} [2021-03-10 21:58:17,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:58:17,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:17,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:17,046 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:17,293 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-10 21:58:17,294 INFO L628 ElimStorePlain]: treesize reduction 51, result has 64.6 percent of original size [2021-03-10 21:58:17,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-03-10 21:58:17,302 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:17,418 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 21:58:17,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:17,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:17,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:17,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:58:17,430 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:58:17,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:17,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:58:17,440 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:58:17,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:17,533 INFO L518 ElimStorePlain]: Eliminatee v_prenex_827 vanished before elimination [2021-03-10 21:58:17,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:58:17,536 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:157, output treesize:47 [2021-03-10 21:58:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:58:17,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:17,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:58:17,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84740792] [2021-03-10 21:58:17,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:58:17,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:17,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:58:17,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:17,782 INFO L87 Difference]: Start difference. First operand 1493 states and 5001 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:18,587 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-03-10 21:58:18,819 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 21:58:19,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:19,074 INFO L93 Difference]: Finished difference Result 1817 states and 5963 transitions. [2021-03-10 21:58:19,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:58:19,076 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:58:19,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:19,079 INFO L225 Difference]: With dead ends: 1817 [2021-03-10 21:58:19,079 INFO L226 Difference]: Without dead ends: 1764 [2021-03-10 21:58:19,079 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1889.7ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:58:19,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2021-03-10 21:58:19,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1491. [2021-03-10 21:58:19,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1490 states have (on average 3.353020134228188) internal successors, (4996), 1490 states have internal predecessors, (4996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:19,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 4996 transitions. [2021-03-10 21:58:19,095 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 4996 transitions. Word has length 24 [2021-03-10 21:58:19,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:19,095 INFO L480 AbstractCegarLoop]: Abstraction has 1491 states and 4996 transitions. [2021-03-10 21:58:19,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:19,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 4996 transitions. [2021-03-10 21:58:19,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:58:19,097 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:19,097 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:19,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1612,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:19,297 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:19,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:19,298 INFO L82 PathProgramCache]: Analyzing trace with hash 396809378, now seen corresponding path program 215 times [2021-03-10 21:58:19,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:19,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866970089] [2021-03-10 21:58:19,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:58:19,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866970089] [2021-03-10 21:58:19,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132595156] [2021-03-10 21:58:19,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:19,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:58:19,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:19,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:58:19,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:20,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:20,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:20,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:58:20,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:20,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:20,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:58:20,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:20,406 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 21:58:20,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:20,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:20,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:20,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:58:20,416 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:20,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:20,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:58:20,425 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:20,573 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 21:58:20,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:20,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:58:20,582 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-03-10 21:58:20,747 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 21:58:20,981 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_832], 1=[v_prenex_833, o_4]} [2021-03-10 21:58:20,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:20,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:20,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:20,996 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:21,266 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-10 21:58:21,267 INFO L628 ElimStorePlain]: treesize reduction 46, result has 67.8 percent of original size [2021-03-10 21:58:21,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:58:21,274 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:21,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:58:21,282 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:21,388 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:58:21,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:21,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:21,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:58:21,400 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:58:21,521 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 21:58:21,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:21,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:21,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:58:21,532 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:58:21,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:21,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:58:21,633 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:157, output treesize:47 [2021-03-10 21:58:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:58:21,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:21,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:58:21,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213663829] [2021-03-10 21:58:21,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:58:21,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:21,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:58:21,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:58:21,871 INFO L87 Difference]: Start difference. First operand 1491 states and 4996 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:22,546 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-03-10 21:58:22,830 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2021-03-10 21:58:23,023 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-03-10 21:58:23,305 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 21:58:23,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:23,553 INFO L93 Difference]: Finished difference Result 1839 states and 6019 transitions. [2021-03-10 21:58:23,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:58:23,555 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:58:23,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:23,557 INFO L225 Difference]: With dead ends: 1839 [2021-03-10 21:58:23,557 INFO L226 Difference]: Without dead ends: 1790 [2021-03-10 21:58:23,557 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1999.3ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:58:23,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-03-10 21:58:23,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1492. [2021-03-10 21:58:23,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1491 states have (on average 3.35345405767941) internal successors, (5000), 1491 states have internal predecessors, (5000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:23,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 5000 transitions. [2021-03-10 21:58:23,573 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 5000 transitions. Word has length 24 [2021-03-10 21:58:23,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:23,573 INFO L480 AbstractCegarLoop]: Abstraction has 1492 states and 5000 transitions. [2021-03-10 21:58:23,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:23,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 5000 transitions. [2021-03-10 21:58:23,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:58:23,575 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:23,575 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:23,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1620 [2021-03-10 21:58:23,775 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:23,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:23,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1591423296, now seen corresponding path program 216 times [2021-03-10 21:58:23,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:23,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707403980] [2021-03-10 21:58:23,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:24,265 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-10 21:58:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:58:24,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707403980] [2021-03-10 21:58:24,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758682321] [2021-03-10 21:58:24,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:24,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:58:24,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:24,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:58:24,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:24,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:24,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:24,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:58:24,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:24,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:24,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:58:24,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:25,033 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 21:58:25,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:25,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:25,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:25,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:58:25,045 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:25,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:25,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:58:25,054 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:25,214 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 21:58:25,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:25,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:58:25,223 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-03-10 21:58:25,476 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_838, v_prenex_840, v_prenex_842], 1=[o_4, v_prenex_839, v_prenex_841, v_prenex_843]} [2021-03-10 21:58:25,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:58:25,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:25,638 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 21:58:25,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:25,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:25,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:25,796 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-10 21:58:25,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:25,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:58:25,806 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:25,952 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 21:58:25,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:25,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:25,961 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:26,094 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 21:58:26,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:26,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:26,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:58:26,106 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:58:26,247 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 21:58:26,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:26,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:26,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:58:26,258 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:58:26,397 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 21:58:26,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:26,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:26,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:58:26,409 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:58:26,539 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 21:58:26,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:26,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:26,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:58:26,552 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:58:26,677 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 21:58:26,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:26,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:58:26,680 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-03-10 21:58:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:58:27,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:27,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:58:27,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816323210] [2021-03-10 21:58:27,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:58:27,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:27,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:58:27,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:27,043 INFO L87 Difference]: Start difference. First operand 1492 states and 5000 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:27,719 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-03-10 21:58:28,048 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-10 21:58:28,377 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-03-10 21:58:28,625 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-03-10 21:58:28,825 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-03-10 21:58:29,011 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-10 21:58:29,287 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-03-10 21:58:29,575 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-03-10 21:58:30,022 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-03-10 21:58:30,260 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 21:58:30,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:30,487 INFO L93 Difference]: Finished difference Result 2180 states and 6932 transitions. [2021-03-10 21:58:30,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:58:30,489 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:58:30,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:30,492 INFO L225 Difference]: With dead ends: 2180 [2021-03-10 21:58:30,493 INFO L226 Difference]: Without dead ends: 2068 [2021-03-10 21:58:30,493 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3597.5ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:58:30,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2021-03-10 21:58:30,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1499. [2021-03-10 21:58:30,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 3.355807743658211) internal successors, (5027), 1498 states have internal predecessors, (5027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:30,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 5027 transitions. [2021-03-10 21:58:30,511 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 5027 transitions. Word has length 24 [2021-03-10 21:58:30,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:30,511 INFO L480 AbstractCegarLoop]: Abstraction has 1499 states and 5027 transitions. [2021-03-10 21:58:30,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:30,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 5027 transitions. [2021-03-10 21:58:30,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:58:30,512 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:30,512 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:30,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1632 [2021-03-10 21:58:30,713 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:30,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:30,713 INFO L82 PathProgramCache]: Analyzing trace with hash 359663754, now seen corresponding path program 217 times [2021-03-10 21:58:30,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:30,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455523827] [2021-03-10 21:58:30,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:31,235 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 21:58:31,373 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 21:58:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:58:31,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455523827] [2021-03-10 21:58:31,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329178951] [2021-03-10 21:58:31,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:31,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:58:31,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:31,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:31,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:31,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:58:31,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:31,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:31,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:58:32,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:32,178 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 21:58:32,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:32,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:32,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:32,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:58:32,190 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:32,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:32,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:58:32,199 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:32,364 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 21:58:32,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:32,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:58:32,374 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-03-10 21:58:32,573 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 21:58:32,667 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_848, v_prenex_850, v_prenex_852], 1=[o_4, v_prenex_849, v_prenex_851, v_prenex_853]} [2021-03-10 21:58:32,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:58:32,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:32,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:58:32,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:33,294 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2021-03-10 21:58:33,295 INFO L628 ElimStorePlain]: treesize reduction 157, result has 54.8 percent of original size [2021-03-10 21:58:33,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:58:33,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:33,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:58:33,313 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:33,542 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 21:58:33,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:33,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:33,551 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:33,776 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-10 21:58:33,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:33,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:33,785 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:34,006 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 21:58:34,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:34,007 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:58:34,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:34,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:58:34,019 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:58:34,221 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 21:58:34,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:34,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:34,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:58:34,233 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:58:34,422 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 21:58:34,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:34,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:34,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:58:34,434 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:58:34,630 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 21:58:34,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:34,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:58:34,634 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-03-10 21:58:34,800 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 21:58:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:58:35,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:35,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:58:35,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766394200] [2021-03-10 21:58:35,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:58:35,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:35,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:58:35,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:35,091 INFO L87 Difference]: Start difference. First operand 1499 states and 5027 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:35,861 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-03-10 21:58:36,205 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-10 21:58:36,568 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-03-10 21:58:36,887 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-03-10 21:58:37,220 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-03-10 21:58:37,413 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-03-10 21:58:37,797 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-03-10 21:58:38,093 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-03-10 21:58:38,279 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 21:58:38,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:38,811 INFO L93 Difference]: Finished difference Result 1999 states and 6504 transitions. [2021-03-10 21:58:38,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:58:38,814 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:58:38,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:38,817 INFO L225 Difference]: With dead ends: 1999 [2021-03-10 21:58:38,817 INFO L226 Difference]: Without dead ends: 1953 [2021-03-10 21:58:38,817 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 4067.1ms TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:58:38,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-03-10 21:58:38,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1497. [2021-03-10 21:58:38,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 3.356951871657754) internal successors, (5022), 1496 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 5022 transitions. [2021-03-10 21:58:38,835 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 5022 transitions. Word has length 24 [2021-03-10 21:58:38,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:38,835 INFO L480 AbstractCegarLoop]: Abstraction has 1497 states and 5022 transitions. [2021-03-10 21:58:38,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 5022 transitions. [2021-03-10 21:58:38,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:58:38,837 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:38,837 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:39,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1642,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:39,037 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:39,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:39,038 INFO L82 PathProgramCache]: Analyzing trace with hash -757651926, now seen corresponding path program 218 times [2021-03-10 21:58:39,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:39,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485036539] [2021-03-10 21:58:39,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:39,563 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:58:39,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485036539] [2021-03-10 21:58:39,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780590146] [2021-03-10 21:58:39,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:39,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:58:39,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:39,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:58:39,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:40,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:40,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:40,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:40,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:40,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:40,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:40,151 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:40,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:40,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:58:40,230 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:83, output treesize:69 [2021-03-10 21:58:40,503 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_2]} [2021-03-10 21:58:40,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:58:40,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:40,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:40,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:40,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:40,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:40,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:40,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:58:40,598 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:58:40,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:40,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:58:40,609 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:58:40,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:40,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:58:40,674 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:69, output treesize:27 [2021-03-10 21:58:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:58:40,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:40,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:58:40,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17566735] [2021-03-10 21:58:40,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:58:40,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:40,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:58:40,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:58:40,846 INFO L87 Difference]: Start difference. First operand 1497 states and 5022 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:41,449 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-10 21:58:41,888 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 21:58:42,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:42,193 INFO L93 Difference]: Finished difference Result 1832 states and 6030 transitions. [2021-03-10 21:58:42,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:58:42,195 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:58:42,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:42,199 INFO L225 Difference]: With dead ends: 1832 [2021-03-10 21:58:42,199 INFO L226 Difference]: Without dead ends: 1793 [2021-03-10 21:58:42,199 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1597.6ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:58:42,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2021-03-10 21:58:42,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1500. [2021-03-10 21:58:42,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 3.3569046030687124) internal successors, (5032), 1499 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:42,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 5032 transitions. [2021-03-10 21:58:42,216 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 5032 transitions. Word has length 24 [2021-03-10 21:58:42,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:42,216 INFO L480 AbstractCegarLoop]: Abstraction has 1500 states and 5032 transitions. [2021-03-10 21:58:42,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:42,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 5032 transitions. [2021-03-10 21:58:42,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:58:42,218 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:42,218 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:42,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1652 [2021-03-10 21:58:42,418 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:42,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:42,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1568984904, now seen corresponding path program 219 times [2021-03-10 21:58:42,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:42,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038741783] [2021-03-10 21:58:42,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:58:42,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038741783] [2021-03-10 21:58:42,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872609098] [2021-03-10 21:58:42,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:43,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:58:43,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:43,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:58:43,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:43,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:43,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:43,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:43,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:43,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:43,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:43,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:43,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:43,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:58:43,583 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:83, output treesize:69 [2021-03-10 21:58:43,775 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_858], 1=[o_2, v_prenex_859]} [2021-03-10 21:58:43,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:43,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:43,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:58:43,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:43,979 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 21:58:43,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:43,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:43,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:43,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:58:43,997 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:44,157 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 21:58:44,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:44,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:44,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:44,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:58:44,170 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:58:44,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:44,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:58:44,181 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:58:44,365 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 21:58:44,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:44,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:44,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:44,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:58:44,378 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:58:44,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:44,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:58:44,390 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:58:44,532 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 21:58:44,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:44,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:58:44,535 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:161, output treesize:69 [2021-03-10 21:58:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:58:44,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:44,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:58:44,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589390589] [2021-03-10 21:58:44,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:58:44,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:44,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:58:44,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:58:44,837 INFO L87 Difference]: Start difference. First operand 1500 states and 5032 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:45,479 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-03-10 21:58:45,814 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-03-10 21:58:46,102 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-10 21:58:46,321 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-03-10 21:58:46,736 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-03-10 21:58:47,079 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 21:58:47,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:47,089 INFO L93 Difference]: Finished difference Result 1918 states and 6269 transitions. [2021-03-10 21:58:47,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:58:47,091 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:58:47,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:47,094 INFO L225 Difference]: With dead ends: 1918 [2021-03-10 21:58:47,094 INFO L226 Difference]: Without dead ends: 1871 [2021-03-10 21:58:47,095 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2452.3ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:58:47,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-03-10 21:58:47,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1505. [2021-03-10 21:58:47,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 3.363031914893617) internal successors, (5058), 1504 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:47,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 5058 transitions. [2021-03-10 21:58:47,120 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 5058 transitions. Word has length 24 [2021-03-10 21:58:47,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:47,120 INFO L480 AbstractCegarLoop]: Abstraction has 1505 states and 5058 transitions. [2021-03-10 21:58:47,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:47,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 5058 transitions. [2021-03-10 21:58:47,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:58:47,121 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:47,121 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:47,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1660 [2021-03-10 21:58:47,322 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:47,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:47,322 INFO L82 PathProgramCache]: Analyzing trace with hash 688711368, now seen corresponding path program 220 times [2021-03-10 21:58:47,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:47,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867359581] [2021-03-10 21:58:47,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:47,784 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 21:58:47,954 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-03-10 21:58:48,126 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:58:48,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867359581] [2021-03-10 21:58:48,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894421784] [2021-03-10 21:58:48,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:48,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:58:48,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:48,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:58:48,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:48,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:48,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:48,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:48,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:48,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:48,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:48,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:48,774 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 21:58:48,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:48,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:48,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:48,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:48,784 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:48,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:48,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:48,793 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:48,995 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 21:58:48,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:49,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:58:49,001 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-03-10 21:58:49,219 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-10 21:58:49,363 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_866, o_0, v_prenex_868, v_prenex_864], 1=[v_prenex_867, v_prenex_869, o_2, v_prenex_865]} [2021-03-10 21:58:49,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:49,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:49,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:58:49,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:49,928 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2021-03-10 21:58:49,929 INFO L628 ElimStorePlain]: treesize reduction 161, result has 53.9 percent of original size [2021-03-10 21:58:49,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-03-10 21:58:49,938 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:50,192 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 21:58:50,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:50,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:58:50,202 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:50,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:50,211 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:50,447 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 21:58:50,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:50,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-03-10 21:58:50,457 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:50,681 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 21:58:50,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:50,682 INFO L518 ElimStorePlain]: Eliminatee v_prenex_867 vanished before elimination [2021-03-10 21:58:50,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:50,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:50,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:58:50,694 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:58:50,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:58:50,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:58:50,705 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:58:50,909 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 21:58:50,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:50,910 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-03-10 21:58:50,910 INFO L518 ElimStorePlain]: Eliminatee v_prenex_865 vanished before elimination [2021-03-10 21:58:50,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:58:50,913 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-03-10 21:58:51,092 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 21:58:51,355 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:58:51,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:51,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:58:51,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047116928] [2021-03-10 21:58:51,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:58:51,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:51,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:58:51,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:51,356 INFO L87 Difference]: Start difference. First operand 1505 states and 5058 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:52,103 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-03-10 21:58:52,565 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-03-10 21:58:52,842 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-10 21:58:53,157 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-03-10 21:58:53,480 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-10 21:58:53,749 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-03-10 21:58:54,058 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2021-03-10 21:58:54,277 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-03-10 21:58:54,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:54,570 INFO L93 Difference]: Finished difference Result 2205 states and 7016 transitions. [2021-03-10 21:58:54,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:58:54,572 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:58:54,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:54,575 INFO L225 Difference]: With dead ends: 2205 [2021-03-10 21:58:54,575 INFO L226 Difference]: Without dead ends: 2091 [2021-03-10 21:58:54,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 3514.6ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:58:54,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-03-10 21:58:54,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1498. [2021-03-10 21:58:54,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 3.358049432197729) internal successors, (5027), 1497 states have internal predecessors, (5027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:54,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 5027 transitions. [2021-03-10 21:58:54,594 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 5027 transitions. Word has length 24 [2021-03-10 21:58:54,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:54,594 INFO L480 AbstractCegarLoop]: Abstraction has 1498 states and 5027 transitions. [2021-03-10 21:58:54,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:54,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 5027 transitions. [2021-03-10 21:58:54,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:58:54,596 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:54,596 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:54,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1670,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:54,799 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:54,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:54,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1105624278, now seen corresponding path program 221 times [2021-03-10 21:58:54,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:54,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436518235] [2021-03-10 21:58:54,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:58:55,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436518235] [2021-03-10 21:58:55,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982452118] [2021-03-10 21:58:55,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:55,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:58:55,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:55,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:58:55,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:55,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:58:55,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 21:58:55,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-03-10 21:58:55,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:55,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-03-10 21:58:55,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:58:55,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:58:55,742 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:55,982 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-03-10 21:58:55,983 INFO L628 ElimStorePlain]: treesize reduction 9, result has 93.2 percent of original size [2021-03-10 21:58:55,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:58:55,985 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:149, output treesize:124 [2021-03-10 21:58:56,147 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 21:58:56,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:58:56,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:56,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:58:56,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:56,772 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-03-10 21:58:56,773 INFO L628 ElimStorePlain]: treesize reduction 157, result has 59.0 percent of original size [2021-03-10 21:58:56,773 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:58:56,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:58:56,782 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:56,995 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 21:58:56,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:56,996 INFO L518 ElimStorePlain]: Eliminatee v_prenex_871 vanished before elimination [2021-03-10 21:58:57,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:57,004 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:57,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:57,013 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:57,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:57,021 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:57,223 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 21:58:57,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:57,224 INFO L518 ElimStorePlain]: Eliminatee v_prenex_873 vanished before elimination [2021-03-10 21:58:57,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:57,233 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:57,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:58:57,241 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:57,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:58:57,250 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:58:57,431 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 21:58:57,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:58:57,432 INFO L518 ElimStorePlain]: Eliminatee v_prenex_875 vanished before elimination [2021-03-10 21:58:57,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 21:58:57,434 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 8 variables, input treesize:433, output treesize:121 [2021-03-10 21:58:57,660 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 21:58:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:58:57,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:57,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:58:57,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595818710] [2021-03-10 21:58:57,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:58:57,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:57,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:58:57,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:58:57,864 INFO L87 Difference]: Start difference. First operand 1498 states and 5027 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:58,701 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-03-10 21:58:59,186 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-03-10 21:58:59,353 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-10 21:58:59,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:59,472 INFO L93 Difference]: Finished difference Result 1928 states and 6259 transitions. [2021-03-10 21:58:59,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:58:59,473 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:58:59,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:59,476 INFO L225 Difference]: With dead ends: 1928 [2021-03-10 21:58:59,476 INFO L226 Difference]: Without dead ends: 1879 [2021-03-10 21:58:59,476 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2253.1ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:58:59,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2021-03-10 21:58:59,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1500. [2021-03-10 21:58:59,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 3.3569046030687124) internal successors, (5032), 1499 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:59,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 5032 transitions. [2021-03-10 21:58:59,492 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 5032 transitions. Word has length 24 [2021-03-10 21:58:59,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:59,492 INFO L480 AbstractCegarLoop]: Abstraction has 1500 states and 5032 transitions. [2021-03-10 21:58:59,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:59,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 5032 transitions. [2021-03-10 21:58:59,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:58:59,494 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:59,494 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:59,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1684 [2021-03-10 21:58:59,695 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:59,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:59,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1151354824, now seen corresponding path program 222 times [2021-03-10 21:58:59,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:59,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102438876] [2021-03-10 21:58:59,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:00,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102438876] [2021-03-10 21:59:00,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084390058] [2021-03-10 21:59:00,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:00,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:59:00,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:00,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:59:00,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:00,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:59:00,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:00,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:59:00,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:00,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:59:00,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:00,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:59:00,437 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:00,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:00,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:59:00,536 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:169, output treesize:151 [2021-03-10 21:59:00,813 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 21:59:00,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:59:00,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 21:59:00,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-03-10 21:59:00,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:59:00,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-03-10 21:59:00,865 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:00,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-03-10 21:59:00,872 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:00,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:59:00,882 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-03-10 21:59:00,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-03-10 21:59:00,891 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:00,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-03-10 21:59:00,899 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:00,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-03-10 21:59:00,908 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-03-10 21:59:01,211 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-03-10 21:59:01,212 INFO L628 ElimStorePlain]: treesize reduction 84, result has 56.5 percent of original size [2021-03-10 21:59:01,212 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-03-10 21:59:01,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:59:01,214 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:373, output treesize:109 [2021-03-10 21:59:01,391 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 21:59:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:01,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:01,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:59:01,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828175161] [2021-03-10 21:59:01,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:01,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:01,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:01,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:01,529 INFO L87 Difference]: Start difference. First operand 1500 states and 5032 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,270 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-03-10 21:59:02,613 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-03-10 21:59:03,288 WARN L205 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-03-10 21:59:03,494 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-03-10 21:59:03,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:03,619 INFO L93 Difference]: Finished difference Result 2021 states and 6483 transitions. [2021-03-10 21:59:03,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:59:03,621 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:59:03,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:03,623 INFO L225 Difference]: With dead ends: 2021 [2021-03-10 21:59:03,623 INFO L226 Difference]: Without dead ends: 1964 [2021-03-10 21:59:03,624 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2554.8ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:59:03,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2021-03-10 21:59:03,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1502. [2021-03-10 21:59:03,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1501 states have (on average 3.355762824783478) internal successors, (5037), 1501 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:03,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 5037 transitions. [2021-03-10 21:59:03,640 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 5037 transitions. Word has length 24 [2021-03-10 21:59:03,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:03,640 INFO L480 AbstractCegarLoop]: Abstraction has 1502 states and 5037 transitions. [2021-03-10 21:59:03,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:03,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 5037 transitions. [2021-03-10 21:59:03,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:59:03,642 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:03,642 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:03,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1696,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:03,842 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:03,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:03,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1895913608, now seen corresponding path program 223 times [2021-03-10 21:59:03,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:03,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818138880] [2021-03-10 21:59:03,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:04,260 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-03-10 21:59:04,410 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-03-10 21:59:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:04,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818138880] [2021-03-10 21:59:04,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648226120] [2021-03-10 21:59:04,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:04,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:59:04,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:04,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:04,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:04,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-03-10 21:59:04,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:04,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:04,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:59:04,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:05,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:05,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:59:05,031 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:55 [2021-03-10 21:59:05,164 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_878, o_0], 1=[v_prenex_879, o_4]} [2021-03-10 21:59:05,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:59:05,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:05,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:59:05,178 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:05,421 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 21:59:05,422 INFO L628 ElimStorePlain]: treesize reduction 63, result has 58.3 percent of original size [2021-03-10 21:59:05,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:05,428 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:05,537 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:59:05,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:05,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:05,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:05,553 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:05,656 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 21:59:05,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:05,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:05,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:05,666 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:05,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:05,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:05,761 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-03-10 21:59:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:05,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:05,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:59:05,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258776768] [2021-03-10 21:59:05,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:59:05,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:05,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:59:05,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:59:05,999 INFO L87 Difference]: Start difference. First operand 1502 states and 5037 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:06,724 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-03-10 21:59:06,970 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 21:59:07,325 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-03-10 21:59:07,537 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 21:59:07,993 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-03-10 21:59:08,317 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 21:59:08,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:08,405 INFO L93 Difference]: Finished difference Result 2107 states and 6664 transitions. [2021-03-10 21:59:08,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:59:08,407 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:59:08,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:08,409 INFO L225 Difference]: With dead ends: 2107 [2021-03-10 21:59:08,409 INFO L226 Difference]: Without dead ends: 1996 [2021-03-10 21:59:08,410 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2660.3ms TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:59:08,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2021-03-10 21:59:08,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1516. [2021-03-10 21:59:08,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 3.347854785478548) internal successors, (5072), 1515 states have internal predecessors, (5072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:08,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 5072 transitions. [2021-03-10 21:59:08,426 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 5072 transitions. Word has length 24 [2021-03-10 21:59:08,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:08,426 INFO L480 AbstractCegarLoop]: Abstraction has 1516 states and 5072 transitions. [2021-03-10 21:59:08,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:08,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 5072 transitions. [2021-03-10 21:59:08,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:59:08,427 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:08,428 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:08,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1701 [2021-03-10 21:59:08,628 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:08,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:08,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1007211306, now seen corresponding path program 224 times [2021-03-10 21:59:08,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:08,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445434152] [2021-03-10 21:59:08,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:09,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445434152] [2021-03-10 21:59:09,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058891323] [2021-03-10 21:59:09,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:09,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:09,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:09,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:59:09,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:09,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:09,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:09,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:59:09,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:09,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:09,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:59:09,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:09,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:09,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:59:09,450 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-03-10 21:59:09,752 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_881], 1=[o_4, v_prenex_882]} [2021-03-10 21:59:09,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:59:09,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:09,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:59:09,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:09,912 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 21:59:09,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:09,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:09,920 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:09,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:09,927 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:10,057 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 21:59:10,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:10,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:10,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:10,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:10,069 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:10,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:10,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:10,079 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:10,207 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 21:59:10,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:10,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:10,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:10,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:10,219 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:10,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:10,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:10,229 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:10,342 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 21:59:10,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:10,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:59:10,346 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:141, output treesize:57 [2021-03-10 21:59:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:10,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:10,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:10,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522670305] [2021-03-10 21:59:10,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:10,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:10,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:10,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:10,618 INFO L87 Difference]: Start difference. First operand 1516 states and 5072 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:11,502 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2021-03-10 21:59:11,874 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-03-10 21:59:12,066 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-03-10 21:59:12,350 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-03-10 21:59:12,628 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-03-10 21:59:12,866 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-03-10 21:59:13,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:13,402 INFO L93 Difference]: Finished difference Result 1942 states and 6342 transitions. [2021-03-10 21:59:13,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:59:13,404 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:59:13,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:13,407 INFO L225 Difference]: With dead ends: 1942 [2021-03-10 21:59:13,407 INFO L226 Difference]: Without dead ends: 1893 [2021-03-10 21:59:13,408 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2651.3ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:59:13,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-03-10 21:59:13,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1517. [2021-03-10 21:59:13,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 3.348944591029024) internal successors, (5077), 1516 states have internal predecessors, (5077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:13,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 5077 transitions. [2021-03-10 21:59:13,424 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 5077 transitions. Word has length 24 [2021-03-10 21:59:13,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:13,424 INFO L480 AbstractCegarLoop]: Abstraction has 1517 states and 5077 transitions. [2021-03-10 21:59:13,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:13,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 5077 transitions. [2021-03-10 21:59:13,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:59:13,425 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:13,425 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:13,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1709 [2021-03-10 21:59:13,625 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:13,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:13,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1720201830, now seen corresponding path program 225 times [2021-03-10 21:59:13,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:13,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734495478] [2021-03-10 21:59:13,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:14,101 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:14,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734495478] [2021-03-10 21:59:14,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875079760] [2021-03-10 21:59:14,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:14,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:59:14,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:14,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:59:14,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:14,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:14,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:14,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:14,309 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:14,316 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,434 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 21:59:14,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:14,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:59:14,437 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:113 [2021-03-10 21:59:14,587 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-10 21:59:14,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:59:14,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-03-10 21:59:14,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:59:14,834 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-03-10 21:59:14,841 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,961 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-10 21:59:14,962 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.2 percent of original size [2021-03-10 21:59:14,962 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-03-10 21:59:14,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:14,964 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:47 [2021-03-10 21:59:15,183 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:15,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:15,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:15,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935863346] [2021-03-10 21:59:15,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:15,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:15,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:15,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:15,184 INFO L87 Difference]: Start difference. First operand 1517 states and 5077 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:15,702 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 21:59:15,997 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-03-10 21:59:16,300 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-10 21:59:16,644 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-03-10 21:59:16,841 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2021-03-10 21:59:16,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:16,968 INFO L93 Difference]: Finished difference Result 2202 states and 7043 transitions. [2021-03-10 21:59:16,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:59:16,970 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:59:16,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:16,973 INFO L225 Difference]: With dead ends: 2202 [2021-03-10 21:59:16,973 INFO L226 Difference]: Without dead ends: 2145 [2021-03-10 21:59:16,973 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2118.3ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:59:16,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-03-10 21:59:16,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 1520. [2021-03-10 21:59:16,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 3.348913759052008) internal successors, (5087), 1519 states have internal predecessors, (5087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:16,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 5087 transitions. [2021-03-10 21:59:16,992 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 5087 transitions. Word has length 24 [2021-03-10 21:59:16,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:16,992 INFO L480 AbstractCegarLoop]: Abstraction has 1520 states and 5087 transitions. [2021-03-10 21:59:16,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:16,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 5087 transitions. [2021-03-10 21:59:16,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:59:16,993 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:16,993 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:17,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1729,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:17,194 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:17,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:17,194 INFO L82 PathProgramCache]: Analyzing trace with hash 985741640, now seen corresponding path program 226 times [2021-03-10 21:59:17,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:17,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273092250] [2021-03-10 21:59:17,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:17,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273092250] [2021-03-10 21:59:17,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107414305] [2021-03-10 21:59:17,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:17,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:59:17,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:17,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:59:17,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:17,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:17,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:17,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:17,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:18,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:18,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:18,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:18,179 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 21:59:18,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:18,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:18,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:18,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:18,200 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:18,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:18,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:18,208 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:18,366 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 21:59:18,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:18,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:59:18,372 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-03-10 21:59:18,550 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 21:59:18,778 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-10 21:59:19,046 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_887], 1=[v_prenex_888, o_2]} [2021-03-10 21:59:19,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-03-10 21:59:19,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:19,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:59:19,061 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:19,318 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-03-10 21:59:19,319 INFO L628 ElimStorePlain]: treesize reduction 65, result has 59.6 percent of original size [2021-03-10 21:59:19,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:59:19,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:19,442 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 21:59:19,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:19,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:19,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:19,453 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:19,562 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:59:19,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:19,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:19,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:19,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:19,574 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:19,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:19,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:19,585 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:19,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:19,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:19,682 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:181, output treesize:47 [2021-03-10 21:59:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:19,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:19,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:19,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595300135] [2021-03-10 21:59:19,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:19,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:19,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:19,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:19,909 INFO L87 Difference]: Start difference. First operand 1520 states and 5087 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:20,501 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-03-10 21:59:20,958 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-03-10 21:59:21,363 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2021-03-10 21:59:21,797 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-03-10 21:59:22,004 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2021-03-10 21:59:22,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:22,143 INFO L93 Difference]: Finished difference Result 2118 states and 6846 transitions. [2021-03-10 21:59:22,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:59:22,145 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:59:22,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:22,148 INFO L225 Difference]: With dead ends: 2118 [2021-03-10 21:59:22,148 INFO L226 Difference]: Without dead ends: 2065 [2021-03-10 21:59:22,148 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2553.1ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:59:22,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2065 states. [2021-03-10 21:59:22,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2065 to 1523. [2021-03-10 21:59:22,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 3.3488830486202366) internal successors, (5097), 1522 states have internal predecessors, (5097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:22,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 5097 transitions. [2021-03-10 21:59:22,165 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 5097 transitions. Word has length 24 [2021-03-10 21:59:22,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:22,165 INFO L480 AbstractCegarLoop]: Abstraction has 1523 states and 5097 transitions. [2021-03-10 21:59:22,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:22,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 5097 transitions. [2021-03-10 21:59:22,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:59:22,167 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:22,167 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:22,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1734,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:22,367 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:22,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:22,367 INFO L82 PathProgramCache]: Analyzing trace with hash -982588826, now seen corresponding path program 227 times [2021-03-10 21:59:22,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:22,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048432845] [2021-03-10 21:59:22,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:22,819 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:22,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048432845] [2021-03-10 21:59:22,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453901070] [2021-03-10 21:59:22,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:22,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:59:22,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:22,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:59:22,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:23,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:23,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:23,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:23,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:23,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:23,024 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:23,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:23,031 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:23,144 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 21:59:23,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:23,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:59:23,147 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:113 [2021-03-10 21:59:23,297 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-10 21:59:23,466 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 21:59:23,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:59:23,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:23,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:59:23,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:23,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:59:23,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:23,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:59:23,516 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:23,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:23,524 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:23,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:23,531 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:23,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:23,538 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:23,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:23,546 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:23,849 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-03-10 21:59:23,850 INFO L628 ElimStorePlain]: treesize reduction 115, result has 53.4 percent of original size [2021-03-10 21:59:23,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:23,859 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:23,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:23,869 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:23,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:23,878 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:23,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:23,888 INFO L550 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:24,027 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 21:59:24,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:24,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:59:24,030 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:297, output treesize:96 [2021-03-10 21:59:24,178 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 21:59:24,438 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:24,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:24,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:59:24,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228589965] [2021-03-10 21:59:24,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:59:24,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:24,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:59:24,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:59:24,439 INFO L87 Difference]: Start difference. First operand 1523 states and 5097 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:24,858 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 21:59:25,135 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-03-10 21:59:25,686 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-03-10 21:59:26,013 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-03-10 21:59:26,580 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-10 21:59:26,790 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 26 [2021-03-10 21:59:27,018 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-03-10 21:59:27,403 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2021-03-10 21:59:27,577 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 21:59:27,797 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 21:59:28,162 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-10 21:59:28,501 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-03-10 21:59:28,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:28,503 INFO L93 Difference]: Finished difference Result 2358 states and 7479 transitions. [2021-03-10 21:59:28,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:59:28,503 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:59:28,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:28,506 INFO L225 Difference]: With dead ends: 2358 [2021-03-10 21:59:28,506 INFO L226 Difference]: Without dead ends: 2232 [2021-03-10 21:59:28,506 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 4454.0ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:59:28,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2021-03-10 21:59:28,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 1526. [2021-03-10 21:59:28,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 3.3488524590163933) internal successors, (5107), 1525 states have internal predecessors, (5107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:28,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 5107 transitions. [2021-03-10 21:59:28,524 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 5107 transitions. Word has length 24 [2021-03-10 21:59:28,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:28,524 INFO L480 AbstractCegarLoop]: Abstraction has 1526 states and 5107 transitions. [2021-03-10 21:59:28,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:28,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 5107 transitions. [2021-03-10 21:59:28,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:59:28,526 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:28,526 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:28,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1745,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:28,726 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:28,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:28,726 INFO L82 PathProgramCache]: Analyzing trace with hash 968498224, now seen corresponding path program 228 times [2021-03-10 21:59:28,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:28,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967763299] [2021-03-10 21:59:28,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:28,908 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 21:59:29,086 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 21:59:29,247 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 21:59:29,414 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 21:59:29,608 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 21:59:29,788 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 21:59:29,948 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 21:59:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:30,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967763299] [2021-03-10 21:59:30,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494692316] [2021-03-10 21:59:30,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:30,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:59:30,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:30,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:59:30,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:30,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:30,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:30,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:30,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:30,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:30,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:30,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:30,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:30,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:59:30,463 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:77, output treesize:63 [2021-03-10 21:59:30,752 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_891], 1=[o_2, v_prenex_892]} [2021-03-10 21:59:30,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:59:30,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:30,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:30,768 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:30,931 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 21:59:30,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:30,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:30,939 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:30,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:59:30,947 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:31,100 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 21:59:31,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:31,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:31,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:31,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:31,113 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:31,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:31,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:31,124 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:31,290 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 21:59:31,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:31,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:31,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:31,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:31,302 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:31,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:31,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:31,313 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:31,452 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 21:59:31,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:31,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:59:31,456 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:161, output treesize:69 [2021-03-10 21:59:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:31,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:31,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:59:31,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677070419] [2021-03-10 21:59:31,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:59:31,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:31,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:59:31,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:59:31,891 INFO L87 Difference]: Start difference. First operand 1526 states and 5107 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:32,380 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 21:59:32,633 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-03-10 21:59:33,027 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-03-10 21:59:33,342 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-03-10 21:59:33,577 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 39 [2021-03-10 21:59:33,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:33,711 INFO L93 Difference]: Finished difference Result 2137 states and 6913 transitions. [2021-03-10 21:59:33,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:59:33,713 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:59:33,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:33,716 INFO L225 Difference]: With dead ends: 2137 [2021-03-10 21:59:33,716 INFO L226 Difference]: Without dead ends: 2106 [2021-03-10 21:59:33,716 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2863.0ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:59:33,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-03-10 21:59:33,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1520. [2021-03-10 21:59:33,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 3.3522053982883477) internal successors, (5092), 1519 states have internal predecessors, (5092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:33,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 5092 transitions. [2021-03-10 21:59:33,734 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 5092 transitions. Word has length 24 [2021-03-10 21:59:33,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:33,734 INFO L480 AbstractCegarLoop]: Abstraction has 1520 states and 5092 transitions. [2021-03-10 21:59:33,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:33,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 5092 transitions. [2021-03-10 21:59:33,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:59:33,735 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:33,735 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:33,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1750 [2021-03-10 21:59:33,936 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:33,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:33,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1908820380, now seen corresponding path program 229 times [2021-03-10 21:59:33,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:33,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875695832] [2021-03-10 21:59:33,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:34,422 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:34,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875695832] [2021-03-10 21:59:34,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574426840] [2021-03-10 21:59:34,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:34,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:59:34,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:34,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:59:34,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:34,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:59:34,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:59:34,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-03-10 21:59:34,621 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:59:34,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-03-10 21:59:34,629 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:34,800 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 21:59:34,801 INFO L628 ElimStorePlain]: treesize reduction 9, result has 92.6 percent of original size [2021-03-10 21:59:34,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:59:34,803 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:112 [2021-03-10 21:59:35,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:59:35,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:35,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:59:35,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:35,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:59:35,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:35,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:59:35,043 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:35,103 INFO L628 ElimStorePlain]: treesize reduction 62, result has 19.5 percent of original size [2021-03-10 21:59:35,103 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:59:35,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:59:35,105 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:15 [2021-03-10 21:59:35,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:35,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:35,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-03-10 21:59:35,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332143016] [2021-03-10 21:59:35,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:35,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:35,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:35,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:35,202 INFO L87 Difference]: Start difference. First operand 1520 states and 5092 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:35,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:35,801 INFO L93 Difference]: Finished difference Result 1719 states and 5574 transitions. [2021-03-10 21:59:35,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:59:35,803 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:59:35,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:35,806 INFO L225 Difference]: With dead ends: 1719 [2021-03-10 21:59:35,806 INFO L226 Difference]: Without dead ends: 1646 [2021-03-10 21:59:35,806 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 906.0ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:59:35,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-03-10 21:59:35,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1525. [2021-03-10 21:59:35,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 3.3490813648293964) internal successors, (5104), 1524 states have internal predecessors, (5104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 5104 transitions. [2021-03-10 21:59:35,829 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 5104 transitions. Word has length 24 [2021-03-10 21:59:35,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:35,829 INFO L480 AbstractCegarLoop]: Abstraction has 1525 states and 5104 transitions. [2021-03-10 21:59:35,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:35,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 5104 transitions. [2021-03-10 21:59:35,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:59:35,831 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:35,831 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:36,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1763 [2021-03-10 21:59:36,031 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:36,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:36,031 INFO L82 PathProgramCache]: Analyzing trace with hash -193439838, now seen corresponding path program 230 times [2021-03-10 21:59:36,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:36,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756555623] [2021-03-10 21:59:36,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:36,543 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:36,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756555623] [2021-03-10 21:59:36,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787720204] [2021-03-10 21:59:36,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:36,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:36,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:36,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:59:36,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:36,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:36,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:36,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:59:36,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:36,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:36,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:59:36,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:36,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:36,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:59:36,801 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:37 [2021-03-10 21:59:37,118 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-03-10 21:59:37,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:37,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:37,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:37,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:37,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:37,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:37,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:37,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:37,205 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:37,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:37,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:37,215 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:37,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:37,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:59:37,270 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:25 [2021-03-10 21:59:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:37,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:37,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:59:37,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780206394] [2021-03-10 21:59:37,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:37,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:37,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:37,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:37,402 INFO L87 Difference]: Start difference. First operand 1525 states and 5104 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:38,077 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-03-10 21:59:38,382 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-10 21:59:38,883 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-10 21:59:39,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:39,265 INFO L93 Difference]: Finished difference Result 1742 states and 5681 transitions. [2021-03-10 21:59:39,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:59:39,267 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:59:39,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:39,269 INFO L225 Difference]: With dead ends: 1742 [2021-03-10 21:59:39,269 INFO L226 Difference]: Without dead ends: 1683 [2021-03-10 21:59:39,270 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1543.3ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:59:39,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-03-10 21:59:39,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1525. [2021-03-10 21:59:39,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 3.3490813648293964) internal successors, (5104), 1524 states have internal predecessors, (5104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:39,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 5104 transitions. [2021-03-10 21:59:39,284 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 5104 transitions. Word has length 24 [2021-03-10 21:59:39,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:39,284 INFO L480 AbstractCegarLoop]: Abstraction has 1525 states and 5104 transitions. [2021-03-10 21:59:39,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:39,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 5104 transitions. [2021-03-10 21:59:39,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:59:39,286 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:39,286 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:39,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1768 [2021-03-10 21:59:39,486 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:39,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:39,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1931411654, now seen corresponding path program 231 times [2021-03-10 21:59:39,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:39,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834720195] [2021-03-10 21:59:39,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:39,868 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-10 21:59:40,004 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-03-10 21:59:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:40,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834720195] [2021-03-10 21:59:40,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075429599] [2021-03-10 21:59:40,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:40,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:59:40,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:40,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:59:40,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:40,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:40,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:40,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-03-10 21:59:40,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:40,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:40,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:59:40,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:40,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:40,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:59:40,420 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:49 [2021-03-10 21:59:40,665 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_896], 1=[o_0, v_prenex_895]} [2021-03-10 21:59:40,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:59:40,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:40,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:59:40,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:40,964 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:59:40,965 INFO L628 ElimStorePlain]: treesize reduction 64, result has 58.2 percent of original size [2021-03-10 21:59:40,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:40,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:41,085 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:59:41,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:41,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:41,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:41,096 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:41,203 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 21:59:41,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:41,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:41,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:41,214 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:41,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:41,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:41,317 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-03-10 21:59:41,561 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:41,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:41,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:41,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440186169] [2021-03-10 21:59:41,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:41,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:41,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:41,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:41,562 INFO L87 Difference]: Start difference. First operand 1525 states and 5104 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:42,289 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-03-10 21:59:42,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:42,596 INFO L93 Difference]: Finished difference Result 1699 states and 5520 transitions. [2021-03-10 21:59:42,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:59:42,598 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:59:42,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:42,601 INFO L225 Difference]: With dead ends: 1699 [2021-03-10 21:59:42,601 INFO L226 Difference]: Without dead ends: 1650 [2021-03-10 21:59:42,601 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1472.0ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:59:42,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-03-10 21:59:42,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1523. [2021-03-10 21:59:42,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 3.3515111695137976) internal successors, (5101), 1522 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:42,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 5101 transitions. [2021-03-10 21:59:42,616 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 5101 transitions. Word has length 24 [2021-03-10 21:59:42,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:42,616 INFO L480 AbstractCegarLoop]: Abstraction has 1523 states and 5101 transitions. [2021-03-10 21:59:42,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:42,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 5101 transitions. [2021-03-10 21:59:42,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:59:42,617 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:42,617 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:42,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1774 [2021-03-10 21:59:42,818 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:42,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:42,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1952730500, now seen corresponding path program 232 times [2021-03-10 21:59:42,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:42,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515484151] [2021-03-10 21:59:42,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:43,320 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:43,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515484151] [2021-03-10 21:59:43,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882772366] [2021-03-10 21:59:43,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:43,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:59:43,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:43,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:59:43,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:43,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:59:43,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:43,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:59:43,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:43,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-03-10 21:59:43,544 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:59:43,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-03-10 21:59:43,552 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:59:43,788 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 21:59:43,789 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.2 percent of original size [2021-03-10 21:59:43,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:59:43,791 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:161, output treesize:135 [2021-03-10 21:59:43,949 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 21:59:44,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:59:44,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:44,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:59:44,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:44,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:59:44,043 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:44,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:59:44,050 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:44,110 INFO L628 ElimStorePlain]: treesize reduction 62, result has 19.5 percent of original size [2021-03-10 21:59:44,110 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:59:44,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:59:44,112 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:15 [2021-03-10 21:59:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:44,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:44,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-03-10 21:59:44,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9235861] [2021-03-10 21:59:44,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:44,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:44,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:44,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:44,214 INFO L87 Difference]: Start difference. First operand 1523 states and 5101 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:44,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:44,812 INFO L93 Difference]: Finished difference Result 1638 states and 5378 transitions. [2021-03-10 21:59:44,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:59:44,814 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:59:44,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:44,817 INFO L225 Difference]: With dead ends: 1638 [2021-03-10 21:59:44,817 INFO L226 Difference]: Without dead ends: 1579 [2021-03-10 21:59:44,817 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1014.5ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:59:44,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-03-10 21:59:44,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1523. [2021-03-10 21:59:44,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 3.3515111695137976) internal successors, (5101), 1522 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 5101 transitions. [2021-03-10 21:59:44,831 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 5101 transitions. Word has length 24 [2021-03-10 21:59:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:44,831 INFO L480 AbstractCegarLoop]: Abstraction has 1523 states and 5101 transitions. [2021-03-10 21:59:44,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 5101 transitions. [2021-03-10 21:59:44,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:59:44,833 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:44,833 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:45,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1780,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:45,033 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:45,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:45,034 INFO L82 PathProgramCache]: Analyzing trace with hash 604264980, now seen corresponding path program 233 times [2021-03-10 21:59:45,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:45,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443050345] [2021-03-10 21:59:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:45,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:45,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443050345] [2021-03-10 21:59:45,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276477985] [2021-03-10 21:59:45,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:45,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:59:45,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:45,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:59:45,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:45,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:59:45,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:45,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:59:45,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:45,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-03-10 21:59:45,781 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:59:45,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-03-10 21:59:45,789 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:59:46,027 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 21:59:46,028 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.2 percent of original size [2021-03-10 21:59:46,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:59:46,030 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:161, output treesize:135 [2021-03-10 21:59:46,187 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 21:59:46,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:59:46,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:46,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:59:46,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:46,790 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-03-10 21:59:46,791 INFO L628 ElimStorePlain]: treesize reduction 161, result has 58.8 percent of original size [2021-03-10 21:59:46,792 INFO L518 ElimStorePlain]: Eliminatee v_prenex_900 vanished before elimination [2021-03-10 21:59:46,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 21:59:46,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:47,028 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 21:59:47,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:47,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 21:59:47,038 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:47,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:47,047 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:47,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:47,056 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:47,262 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 21:59:47,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:47,263 INFO L518 ElimStorePlain]: Eliminatee v_prenex_902 vanished before elimination [2021-03-10 21:59:47,263 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 21:59:47,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:47,272 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:47,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:47,280 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:47,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:47,289 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:47,466 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 21:59:47,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:47,467 INFO L518 ElimStorePlain]: Eliminatee v_prenex_898 vanished before elimination [2021-03-10 21:59:47,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 21:59:47,469 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 8 variables, input treesize:445, output treesize:121 [2021-03-10 21:59:47,691 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 21:59:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:47,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:47,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 21:59:47,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640394198] [2021-03-10 21:59:47,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:59:47,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:47,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:59:47,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:59:47,866 INFO L87 Difference]: Start difference. First operand 1523 states and 5101 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:48,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:48,549 INFO L93 Difference]: Finished difference Result 1630 states and 5356 transitions. [2021-03-10 21:59:48,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:59:48,551 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:59:48,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:48,553 INFO L225 Difference]: With dead ends: 1630 [2021-03-10 21:59:48,553 INFO L226 Difference]: Without dead ends: 1581 [2021-03-10 21:59:48,554 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1263.7ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:48,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2021-03-10 21:59:48,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1525. [2021-03-10 21:59:48,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 3.3503937007874014) internal successors, (5106), 1524 states have internal predecessors, (5106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:48,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 5106 transitions. [2021-03-10 21:59:48,568 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 5106 transitions. Word has length 24 [2021-03-10 21:59:48,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:48,568 INFO L480 AbstractCegarLoop]: Abstraction has 1525 states and 5106 transitions. [2021-03-10 21:59:48,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:48,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 5106 transitions. [2021-03-10 21:59:48,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:59:48,570 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:48,570 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:48,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1785,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:48,770 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:48,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:48,770 INFO L82 PathProgramCache]: Analyzing trace with hash 66772124, now seen corresponding path program 234 times [2021-03-10 21:59:48,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:48,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843555517] [2021-03-10 21:59:48,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:49,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:49,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843555517] [2021-03-10 21:59:49,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252159485] [2021-03-10 21:59:49,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:49,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:59:49,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:49,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:59:49,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:49,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:59:49,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:49,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:59:49,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:49,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:49,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:59:49,644 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:73 [2021-03-10 21:59:49,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:49,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:49,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-03-10 21:59:49,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:49,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:49,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:49,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:59:49,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:49,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:49,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:49,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-03-10 21:59:49,840 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:49,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:49,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:59:49,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:50,122 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-10 21:59:50,123 INFO L628 ElimStorePlain]: treesize reduction 54, result has 60.0 percent of original size [2021-03-10 21:59:50,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:50,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:50,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:50,135 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:50,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:50,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:50,145 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:50,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:50,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:50,248 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:181, output treesize:47 [2021-03-10 21:59:50,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:50,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:50,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:50,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521809961] [2021-03-10 21:59:50,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:50,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:50,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:50,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:50,488 INFO L87 Difference]: Start difference. First operand 1525 states and 5106 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:51,253 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-03-10 21:59:51,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:51,460 INFO L93 Difference]: Finished difference Result 1634 states and 5368 transitions. [2021-03-10 21:59:51,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:59:51,462 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:59:51,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:51,464 INFO L225 Difference]: With dead ends: 1634 [2021-03-10 21:59:51,464 INFO L226 Difference]: Without dead ends: 1581 [2021-03-10 21:59:51,465 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1324.2ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:59:51,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2021-03-10 21:59:51,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1521. [2021-03-10 21:59:51,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 3.3526315789473684) internal successors, (5096), 1520 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:51,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 5096 transitions. [2021-03-10 21:59:51,479 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 5096 transitions. Word has length 24 [2021-03-10 21:59:51,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:51,479 INFO L480 AbstractCegarLoop]: Abstraction has 1521 states and 5096 transitions. [2021-03-10 21:59:51,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:51,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 5096 transitions. [2021-03-10 21:59:51,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:59:51,481 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:51,481 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:51,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1796 [2021-03-10 21:59:51,683 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:51,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:51,683 INFO L82 PathProgramCache]: Analyzing trace with hash 128852794, now seen corresponding path program 235 times [2021-03-10 21:59:51,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:51,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518878194] [2021-03-10 21:59:51,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:52,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518878194] [2021-03-10 21:59:52,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984094294] [2021-03-10 21:59:52,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:52,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:59:52,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:52,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:52,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:52,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:59:52,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:52,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:52,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:52,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:59:52,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:52,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:52,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:52,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:59:52,350 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:52,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:52,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:59:52,358 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:52,485 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 21:59:52,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:52,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:59:52,491 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:133, output treesize:105 [2021-03-10 21:59:52,652 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 21:59:53,068 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-03-10 21:59:53,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:59:53,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:53,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:59:53,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:53,169 INFO L628 ElimStorePlain]: treesize reduction 35, result has 42.6 percent of original size [2021-03-10 21:59:53,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:53,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:53,180 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:53,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:53,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:59:53,206 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:12 [2021-03-10 21:59:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:53,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:53,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:53,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868399277] [2021-03-10 21:59:53,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:53,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:53,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:53,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:53,321 INFO L87 Difference]: Start difference. First operand 1521 states and 5096 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:53,786 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-03-10 21:59:54,133 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 21:59:54,425 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-03-10 21:59:54,742 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 21:59:55,017 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 21:59:55,274 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-10 21:59:55,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:55,342 INFO L93 Difference]: Finished difference Result 2030 states and 6383 transitions. [2021-03-10 21:59:55,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:59:55,344 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:59:55,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:55,347 INFO L225 Difference]: With dead ends: 2030 [2021-03-10 21:59:55,347 INFO L226 Difference]: Without dead ends: 1930 [2021-03-10 21:59:55,347 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2219.4ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:59:55,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2021-03-10 21:59:55,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1536. [2021-03-10 21:59:55,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 3.3498371335504884) internal successors, (5142), 1535 states have internal predecessors, (5142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:55,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 5142 transitions. [2021-03-10 21:59:55,365 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 5142 transitions. Word has length 24 [2021-03-10 21:59:55,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:55,365 INFO L480 AbstractCegarLoop]: Abstraction has 1536 states and 5142 transitions. [2021-03-10 21:59:55,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:55,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 5142 transitions. [2021-03-10 21:59:55,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:59:55,367 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:55,367 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:55,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1801,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:55,567 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:55,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:55,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1973407424, now seen corresponding path program 236 times [2021-03-10 21:59:55,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:55,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881904433] [2021-03-10 21:59:55,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:56,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881904433] [2021-03-10 21:59:56,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053771055] [2021-03-10 21:59:56,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:56,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:56,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:56,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:59:56,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:56,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:56,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:56,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:59:56,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:56,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:56,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:59:56,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:56,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:56,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 21:59:56,290 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:43 [2021-03-10 21:59:56,771 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-03-10 21:59:56,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:56,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:56,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:59:56,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:56,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:56,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:56,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:56,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:56,862 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:56,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:59:56,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:56,873 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:59:56,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:56,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:59:56,931 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:25 [2021-03-10 21:59:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:59:57,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:57,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:59:57,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702534824] [2021-03-10 21:59:57,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:59:57,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:57,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:59:57,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:57,069 INFO L87 Difference]: Start difference. First operand 1536 states and 5142 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:57,659 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-03-10 21:59:57,930 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-03-10 21:59:58,178 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-10 21:59:58,436 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2021-03-10 21:59:58,574 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 21:59:58,783 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 21:59:59,166 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2021-03-10 21:59:59,406 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 21:59:59,675 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2021-03-10 21:59:59,999 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-10 22:00:00,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:00,269 INFO L93 Difference]: Finished difference Result 1931 states and 6182 transitions. [2021-03-10 22:00:00,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:00:00,271 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:00:00,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:00,274 INFO L225 Difference]: With dead ends: 1931 [2021-03-10 22:00:00,274 INFO L226 Difference]: Without dead ends: 1852 [2021-03-10 22:00:00,274 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2824.2ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:00:00,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2021-03-10 22:00:00,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1545. [2021-03-10 22:00:00,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.34779792746114) internal successors, (5169), 1544 states have internal predecessors, (5169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:00,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5169 transitions. [2021-03-10 22:00:00,291 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5169 transitions. Word has length 24 [2021-03-10 22:00:00,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:00,291 INFO L480 AbstractCegarLoop]: Abstraction has 1545 states and 5169 transitions. [2021-03-10 22:00:00,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:00,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5169 transitions. [2021-03-10 22:00:00,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:00:00,293 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:00,293 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:00,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1807,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:00,494 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:00,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:00,494 INFO L82 PathProgramCache]: Analyzing trace with hash 583588056, now seen corresponding path program 237 times [2021-03-10 22:00:00,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:00,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356916573] [2021-03-10 22:00:00,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:01,073 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:00:01,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356916573] [2021-03-10 22:00:01,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022542779] [2021-03-10 22:00:01,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:01,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:00:01,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:01,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:00:01,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:01,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:01,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:01,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:00:01,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:01,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:01,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:01,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:00:01,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:01,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:01,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:01,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:00:01,308 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:01,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:01,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:00:01,316 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:01,453 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 22:00:01,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:01,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 22:00:01,460 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:133, output treesize:105 [2021-03-10 22:00:01,646 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 22:00:01,989 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_911, o_4], 1=[v_prenex_910, o_0]} [2021-03-10 22:00:01,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:00:01,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:02,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:00:02,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:02,391 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-03-10 22:00:02,392 INFO L628 ElimStorePlain]: treesize reduction 47, result has 67.6 percent of original size [2021-03-10 22:00:02,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:00:02,401 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:02,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 22:00:02,411 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:02,543 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 22:00:02,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:02,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:02,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:02,556 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:00:02,689 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 22:00:02,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:02,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:02,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:02,702 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:00:02,819 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 22:00:02,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:02,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:02,824 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:157, output treesize:47 [2021-03-10 22:00:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:00:03,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:03,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:00:03,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785052953] [2021-03-10 22:00:03,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:03,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:03,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:03,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:03,131 INFO L87 Difference]: Start difference. First operand 1545 states and 5169 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:03,576 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-03-10 22:00:03,838 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 36 [2021-03-10 22:00:03,988 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 22:00:04,375 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-03-10 22:00:04,534 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2021-03-10 22:00:04,752 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-03-10 22:00:05,000 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-03-10 22:00:05,235 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-03-10 22:00:05,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:05,377 INFO L93 Difference]: Finished difference Result 1994 states and 6282 transitions. [2021-03-10 22:00:05,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:00:05,379 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:00:05,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:05,381 INFO L225 Difference]: With dead ends: 1994 [2021-03-10 22:00:05,381 INFO L226 Difference]: Without dead ends: 1906 [2021-03-10 22:00:05,382 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2742.3ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:00:05,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2021-03-10 22:00:05,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1539. [2021-03-10 22:00:05,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 3.352405721716515) internal successors, (5156), 1538 states have internal predecessors, (5156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:05,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 5156 transitions. [2021-03-10 22:00:05,399 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 5156 transitions. Word has length 24 [2021-03-10 22:00:05,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:05,399 INFO L480 AbstractCegarLoop]: Abstraction has 1539 states and 5156 transitions. [2021-03-10 22:00:05,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:05,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 5156 transitions. [2021-03-10 22:00:05,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:00:05,400 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:05,401 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:05,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1815,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:05,601 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:05,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:05,601 INFO L82 PathProgramCache]: Analyzing trace with hash 294542010, now seen corresponding path program 238 times [2021-03-10 22:00:05,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:05,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922155458] [2021-03-10 22:00:05,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:00:06,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922155458] [2021-03-10 22:00:06,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598350329] [2021-03-10 22:00:06,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:06,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:06,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:06,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:00:06,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:06,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:06,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:06,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:00:06,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:06,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:06,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:06,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:00:06,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:06,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:06,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:06,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:00:06,333 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:06,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:06,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:00:06,342 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:06,477 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 22:00:06,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:06,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 22:00:06,483 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:133, output treesize:105 [2021-03-10 22:00:06,667 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 22:00:07,072 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-03-10 22:00:07,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 22:00:07,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:07,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 22:00:07,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:07,177 INFO L628 ElimStorePlain]: treesize reduction 41, result has 38.8 percent of original size [2021-03-10 22:00:07,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:07,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:07,188 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:00:07,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:07,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:00:07,215 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:12 [2021-03-10 22:00:07,341 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:00:07,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:07,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:00:07,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948865498] [2021-03-10 22:00:07,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:00:07,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:07,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:00:07,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:07,342 INFO L87 Difference]: Start difference. First operand 1539 states and 5156 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:08,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:08,326 INFO L93 Difference]: Finished difference Result 1854 states and 5940 transitions. [2021-03-10 22:00:08,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:00:08,329 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:00:08,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:08,331 INFO L225 Difference]: With dead ends: 1854 [2021-03-10 22:00:08,331 INFO L226 Difference]: Without dead ends: 1769 [2021-03-10 22:00:08,332 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1298.7ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:00:08,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2021-03-10 22:00:08,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1538. [2021-03-10 22:00:08,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 3.3493819128171762) internal successors, (5148), 1537 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:08,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 5148 transitions. [2021-03-10 22:00:08,348 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 5148 transitions. Word has length 24 [2021-03-10 22:00:08,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:08,348 INFO L480 AbstractCegarLoop]: Abstraction has 1538 states and 5148 transitions. [2021-03-10 22:00:08,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:08,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 5148 transitions. [2021-03-10 22:00:08,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:00:08,349 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:08,349 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:08,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1823,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:08,550 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:08,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:08,550 INFO L82 PathProgramCache]: Analyzing trace with hash -679322886, now seen corresponding path program 239 times [2021-03-10 22:00:08,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:08,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862497856] [2021-03-10 22:00:08,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:09,050 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-03-10 22:00:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:00:09,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862497856] [2021-03-10 22:00:09,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605982220] [2021-03-10 22:00:09,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:09,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:00:09,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:09,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:00:09,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:09,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:09,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:09,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:00:09,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:09,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:09,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:09,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:00:09,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:09,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:09,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:09,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:00:09,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:09,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:09,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:00:09,369 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:09,507 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 22:00:09,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:09,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 22:00:09,513 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:133, output treesize:105 [2021-03-10 22:00:09,729 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 22:00:10,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 22:00:10,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 22:00:10,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 22:00:10,234 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 22:00:10,241 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,363 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2021-03-10 22:00:10,364 INFO L628 ElimStorePlain]: treesize reduction 62, result has 19.5 percent of original size [2021-03-10 22:00:10,364 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 22:00:10,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,366 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:161, output treesize:15 [2021-03-10 22:00:10,511 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:00:10,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:10,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:00:10,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587448670] [2021-03-10 22:00:10,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:10,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:10,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:10,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:10,512 INFO L87 Difference]: Start difference. First operand 1538 states and 5148 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:11,134 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2021-03-10 22:00:11,406 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 22:00:11,619 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-03-10 22:00:12,086 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-03-10 22:00:12,375 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 22:00:12,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:12,579 INFO L93 Difference]: Finished difference Result 1863 states and 6040 transitions. [2021-03-10 22:00:12,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:00:12,582 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:00:12,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:12,585 INFO L225 Difference]: With dead ends: 1863 [2021-03-10 22:00:12,585 INFO L226 Difference]: Without dead ends: 1758 [2021-03-10 22:00:12,585 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2156.5ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:00:12,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-03-10 22:00:12,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1531. [2021-03-10 22:00:12,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 3.350980392156863) internal successors, (5127), 1530 states have internal predecessors, (5127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:12,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 5127 transitions. [2021-03-10 22:00:12,602 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 5127 transitions. Word has length 24 [2021-03-10 22:00:12,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:12,602 INFO L480 AbstractCegarLoop]: Abstraction has 1531 states and 5127 transitions. [2021-03-10 22:00:12,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:12,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 5127 transitions. [2021-03-10 22:00:12,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:00:12,635 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:12,635 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:12,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1829,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:12,851 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:12,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:12,858 INFO L82 PathProgramCache]: Analyzing trace with hash -767840582, now seen corresponding path program 240 times [2021-03-10 22:00:12,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:12,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772460828] [2021-03-10 22:00:12,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:00:13,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772460828] [2021-03-10 22:00:13,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790218691] [2021-03-10 22:00:13,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:13,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:00:13,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:13,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:00:13,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:13,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:13,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:13,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:00:13,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:13,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:13,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:13,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:00:13,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:13,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:13,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:13,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:00:13,815 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:13,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:13,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:00:13,827 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:14,035 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 22:00:14,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:14,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 22:00:14,058 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-03-10 22:00:14,485 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-10 22:00:14,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:14,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:14,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:00:14,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:14,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:14,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:00:14,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:15,237 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-03-10 22:00:15,238 INFO L628 ElimStorePlain]: treesize reduction 63, result has 64.0 percent of original size [2021-03-10 22:00:15,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:15,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:00:15,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:15,407 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 22:00:15,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:15,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:15,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:15,420 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:00:15,568 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 22:00:15,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:15,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:15,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:15,581 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:00:15,720 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 22:00:15,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:15,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:15,726 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:189, output treesize:47 [2021-03-10 22:00:16,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:00:16,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:16,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:00:16,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568717753] [2021-03-10 22:00:16,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:00:16,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:16,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:00:16,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:16,020 INFO L87 Difference]: Start difference. First operand 1531 states and 5127 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:16,676 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 22:00:16,905 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 46 [2021-03-10 22:00:17,374 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2021-03-10 22:00:17,597 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-03-10 22:00:17,785 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-03-10 22:00:18,007 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-03-10 22:00:18,223 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 22:00:18,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:18,347 INFO L93 Difference]: Finished difference Result 1872 states and 6008 transitions. [2021-03-10 22:00:18,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:00:18,350 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:00:18,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:18,353 INFO L225 Difference]: With dead ends: 1872 [2021-03-10 22:00:18,353 INFO L226 Difference]: Without dead ends: 1784 [2021-03-10 22:00:18,353 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 2742.9ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:00:18,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-03-10 22:00:18,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1529. [2021-03-10 22:00:18,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.3547120418848166) internal successors, (5126), 1528 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:18,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5126 transitions. [2021-03-10 22:00:18,369 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5126 transitions. Word has length 24 [2021-03-10 22:00:18,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:18,369 INFO L480 AbstractCegarLoop]: Abstraction has 1529 states and 5126 transitions. [2021-03-10 22:00:18,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:18,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5126 transitions. [2021-03-10 22:00:18,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:00:18,371 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:18,371 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:18,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1835,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:18,573 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:18,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:18,573 INFO L82 PathProgramCache]: Analyzing trace with hash -548544606, now seen corresponding path program 241 times [2021-03-10 22:00:18,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:18,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905819221] [2021-03-10 22:00:18,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:19,147 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-03-10 22:00:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:00:19,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905819221] [2021-03-10 22:00:19,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107508068] [2021-03-10 22:00:19,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:19,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:00:19,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:19,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:19,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:19,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:00:19,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:19,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:19,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:19,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:00:19,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:19,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:19,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:19,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:00:19,475 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:19,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:19,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:00:19,484 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:19,674 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 22:00:19,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:19,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 22:00:19,695 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-03-10 22:00:19,885 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-10 22:00:20,160 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-10 22:00:20,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:20,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:20,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 22:00:20,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:20,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:20,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 22:00:20,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:20,830 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 22:00:20,831 INFO L628 ElimStorePlain]: treesize reduction 49, result has 41.0 percent of original size [2021-03-10 22:00:20,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:20,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:20,842 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:00:20,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:20,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:00:20,880 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:99, output treesize:12 [2021-03-10 22:00:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:00:21,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:21,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:00:21,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274274797] [2021-03-10 22:00:21,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:00:21,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:21,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:00:21,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:21,016 INFO L87 Difference]: Start difference. First operand 1529 states and 5126 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:21,672 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-10 22:00:22,027 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 22:00:22,472 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 22:00:22,701 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 22:00:23,049 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-03-10 22:00:23,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:23,251 INFO L93 Difference]: Finished difference Result 1802 states and 5868 transitions. [2021-03-10 22:00:23,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:00:23,253 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:00:23,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:23,255 INFO L225 Difference]: With dead ends: 1802 [2021-03-10 22:00:23,255 INFO L226 Difference]: Without dead ends: 1747 [2021-03-10 22:00:23,256 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2540.2ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:00:23,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-03-10 22:00:23,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1530. [2021-03-10 22:00:23,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1529 states have (on average 3.351863963374755) internal successors, (5125), 1529 states have internal predecessors, (5125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:23,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 5125 transitions. [2021-03-10 22:00:23,281 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 5125 transitions. Word has length 24 [2021-03-10 22:00:23,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:23,282 INFO L480 AbstractCegarLoop]: Abstraction has 1530 states and 5125 transitions. [2021-03-10 22:00:23,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:23,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 5125 transitions. [2021-03-10 22:00:23,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:00:23,283 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:23,283 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:23,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1843,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:23,484 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:23,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:23,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1712786210, now seen corresponding path program 242 times [2021-03-10 22:00:23,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:23,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131691780] [2021-03-10 22:00:23,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:24,039 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 22:00:24,172 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-03-10 22:00:24,238 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:00:24,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131691780] [2021-03-10 22:00:24,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291652276] [2021-03-10 22:00:24,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:24,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:24,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:24,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:00:24,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:24,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:24,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:24,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:00:24,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:24,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:24,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:00:24,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:24,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:24,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:00:24,483 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:24,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:00:24,492 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,685 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 22:00:24,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:24,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 22:00:24,707 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-03-10 22:00:25,136 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-10 22:00:25,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:25,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:00:25,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:25,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:25,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:25,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:25,715 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:00:25,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:25,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:25,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:00:25,815 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:25,925 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 22:00:25,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:25,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:25,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:25,938 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:00:26,064 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 22:00:26,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:26,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:00:26,068 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:93, output treesize:37 [2021-03-10 22:00:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:00:26,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:26,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:00:26,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265723938] [2021-03-10 22:00:26,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:00:26,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:26,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:00:26,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:26,348 INFO L87 Difference]: Start difference. First operand 1530 states and 5125 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:27,082 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-10 22:00:27,507 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 22:00:28,058 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-03-10 22:00:28,276 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 22:00:28,507 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-03-10 22:00:28,687 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-03-10 22:00:29,162 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-03-10 22:00:29,401 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 22:00:29,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:29,705 INFO L93 Difference]: Finished difference Result 1910 states and 6167 transitions. [2021-03-10 22:00:29,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:00:29,708 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:00:29,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:29,710 INFO L225 Difference]: With dead ends: 1910 [2021-03-10 22:00:29,710 INFO L226 Difference]: Without dead ends: 1833 [2021-03-10 22:00:29,711 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 3446.3ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:00:29,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2021-03-10 22:00:29,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1523. [2021-03-10 22:00:29,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 3.3534822601839687) internal successors, (5104), 1522 states have internal predecessors, (5104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 5104 transitions. [2021-03-10 22:00:29,728 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 5104 transitions. Word has length 24 [2021-03-10 22:00:29,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:29,728 INFO L480 AbstractCegarLoop]: Abstraction has 1523 states and 5104 transitions. [2021-03-10 22:00:29,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:29,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 5104 transitions. [2021-03-10 22:00:29,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:00:29,729 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:29,729 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:29,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1850 [2021-03-10 22:00:29,930 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:29,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:29,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1538894040, now seen corresponding path program 243 times [2021-03-10 22:00:29,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:29,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171694397] [2021-03-10 22:00:29,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:30,505 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-10 22:00:30,661 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-03-10 22:00:30,804 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 22:00:30,855 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:00:30,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171694397] [2021-03-10 22:00:30,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384158158] [2021-03-10 22:00:30,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:30,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:00:30,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:30,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:00:30,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:31,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:31,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:31,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:00:31,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:31,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:31,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:00:31,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:31,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:31,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-03-10 22:00:31,154 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:77, output treesize:63 [2021-03-10 22:00:31,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:31,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:31,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:00:31,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:31,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:31,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:00:31,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:31,783 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 22:00:31,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:31,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:31,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:31,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:00:31,795 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:31,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:31,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:00:31,805 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,047 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 22:00:32,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:32,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:32,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:32,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:32,066 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:00:32,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:32,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:32,080 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:00:32,317 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 22:00:32,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:32,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:32,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:32,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:32,333 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:00:32,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:32,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:32,346 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:00:32,561 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 22:00:32,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:32,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:00:32,564 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:193, output treesize:75 [2021-03-10 22:00:33,083 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:00:33,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:33,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:00:33,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329142211] [2021-03-10 22:00:33,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:00:33,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:33,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:00:33,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:33,084 INFO L87 Difference]: Start difference. First operand 1523 states and 5104 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:33,770 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-03-10 22:00:34,134 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-03-10 22:00:34,428 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-10 22:00:34,998 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-03-10 22:00:35,366 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-03-10 22:00:35,862 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-03-10 22:00:36,265 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-10 22:00:36,582 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-03-10 22:00:36,877 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-10 22:00:37,284 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-03-10 22:00:37,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:37,393 INFO L93 Difference]: Finished difference Result 1991 states and 6346 transitions. [2021-03-10 22:00:37,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:00:37,396 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:00:37,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:37,399 INFO L225 Difference]: With dead ends: 1991 [2021-03-10 22:00:37,399 INFO L226 Difference]: Without dead ends: 1898 [2021-03-10 22:00:37,399 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 4547.3ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:00:37,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2021-03-10 22:00:37,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1526. [2021-03-10 22:00:37,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 3.3534426229508196) internal successors, (5114), 1525 states have internal predecessors, (5114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:37,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 5114 transitions. [2021-03-10 22:00:37,416 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 5114 transitions. Word has length 24 [2021-03-10 22:00:37,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:37,416 INFO L480 AbstractCegarLoop]: Abstraction has 1526 states and 5114 transitions. [2021-03-10 22:00:37,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:37,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 5114 transitions. [2021-03-10 22:00:37,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:00:37,417 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:37,417 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:37,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1859,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:37,618 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:37,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:37,618 INFO L82 PathProgramCache]: Analyzing trace with hash -946687590, now seen corresponding path program 244 times [2021-03-10 22:00:37,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:37,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800855743] [2021-03-10 22:00:37,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:38,107 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 22:00:38,282 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-03-10 22:00:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:00:38,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800855743] [2021-03-10 22:00:38,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879927739] [2021-03-10 22:00:38,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:38,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:38,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:38,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:00:38,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:38,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:38,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:38,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:00:38,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:38,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:38,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:38,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:00:38,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:38,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:38,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:38,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:00:38,658 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:38,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:38,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:00:38,668 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:38,878 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 22:00:38,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:38,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 22:00:38,901 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-03-10 22:00:39,103 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-10 22:00:39,371 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-10 22:00:39,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:39,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:39,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:00:39,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:39,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:39,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:00:39,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:40,440 WARN L205 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 88 [2021-03-10 22:00:40,441 INFO L628 ElimStorePlain]: treesize reduction 173, result has 57.9 percent of original size [2021-03-10 22:00:40,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:40,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:40,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:00:40,454 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:40,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:40,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:00:40,466 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:40,782 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-10 22:00:40,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:40,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:40,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:40,797 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:00:41,137 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-10 22:00:41,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:41,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:41,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:41,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:41,153 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:00:41,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:41,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:41,167 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:00:41,483 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-03-10 22:00:41,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:41,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:41,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:00:41,496 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:41,798 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-03-10 22:00:41,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:41,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:41,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:41,813 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:00:42,096 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-10 22:00:42,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:42,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 22:00:42,109 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:42,395 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 22:00:42,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:42,396 INFO L518 ElimStorePlain]: Eliminatee v_prenex_953 vanished before elimination [2021-03-10 22:00:42,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:00:42,400 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:425, output treesize:111 [2021-03-10 22:00:42,629 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 22:00:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:00:42,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:42,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:00:42,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716664189] [2021-03-10 22:00:42,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:00:42,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:42,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:00:42,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:42,934 INFO L87 Difference]: Start difference. First operand 1526 states and 5114 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:43,722 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-10 22:00:44,381 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-03-10 22:00:44,737 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-03-10 22:00:45,054 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-10 22:00:45,482 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-10 22:00:45,735 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-10 22:00:45,940 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-03-10 22:00:46,261 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-10 22:00:46,683 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-10 22:00:46,985 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 22:00:47,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:47,385 INFO L93 Difference]: Finished difference Result 2075 states and 6625 transitions. [2021-03-10 22:00:47,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:00:47,388 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:00:47,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:47,391 INFO L225 Difference]: With dead ends: 2075 [2021-03-10 22:00:47,391 INFO L226 Difference]: Without dead ends: 1972 [2021-03-10 22:00:47,391 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 4636.2ms TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:00:47,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2021-03-10 22:00:47,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1522. [2021-03-10 22:00:47,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 3.353057199211045) internal successors, (5100), 1521 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:47,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 5100 transitions. [2021-03-10 22:00:47,409 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 5100 transitions. Word has length 24 [2021-03-10 22:00:47,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:47,409 INFO L480 AbstractCegarLoop]: Abstraction has 1522 states and 5100 transitions. [2021-03-10 22:00:47,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:47,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 5100 transitions. [2021-03-10 22:00:47,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:00:47,417 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:47,417 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:47,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1869 [2021-03-10 22:00:47,618 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:47,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:47,618 INFO L82 PathProgramCache]: Analyzing trace with hash -897345318, now seen corresponding path program 245 times [2021-03-10 22:00:47,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:47,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648358193] [2021-03-10 22:00:47,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:47,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:00:48,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648358193] [2021-03-10 22:00:48,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761831324] [2021-03-10 22:00:48,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:48,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:00:48,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:48,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:00:48,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:48,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:48,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:48,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 22:00:48,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:48,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:48,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-03-10 22:00:48,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:48,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:48,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-03-10 22:00:48,757 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:67 [2021-03-10 22:00:49,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:49,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:49,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:00:49,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:49,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:49,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:00:49,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:49,280 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-10 22:00:49,281 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-03-10 22:00:49,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:49,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:49,292 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:00:49,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:49,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:00:49,330 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:91, output treesize:12 [2021-03-10 22:00:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:00:49,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:49,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:00:49,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838077568] [2021-03-10 22:00:49,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:00:49,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:49,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:00:49,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:49,466 INFO L87 Difference]: Start difference. First operand 1522 states and 5100 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:50,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:50,457 INFO L93 Difference]: Finished difference Result 1644 states and 5396 transitions. [2021-03-10 22:00:50,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:00:50,459 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:00:50,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:50,461 INFO L225 Difference]: With dead ends: 1644 [2021-03-10 22:00:50,461 INFO L226 Difference]: Without dead ends: 1585 [2021-03-10 22:00:50,462 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1160.5ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:50,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2021-03-10 22:00:50,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1523. [2021-03-10 22:00:50,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 3.3534822601839687) internal successors, (5104), 1522 states have internal predecessors, (5104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:50,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 5104 transitions. [2021-03-10 22:00:50,477 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 5104 transitions. Word has length 24 [2021-03-10 22:00:50,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:50,477 INFO L480 AbstractCegarLoop]: Abstraction has 1523 states and 5104 transitions. [2021-03-10 22:00:50,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:50,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 5104 transitions. [2021-03-10 22:00:50,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:00:50,478 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:50,478 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:50,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1878,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:50,679 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:50,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:50,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1659650162, now seen corresponding path program 246 times [2021-03-10 22:00:50,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:50,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191034404] [2021-03-10 22:00:50,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:51,202 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 22:00:51,351 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 22:00:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:00:51,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191034404] [2021-03-10 22:00:51,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079825188] [2021-03-10 22:00:51,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:51,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:00:51,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:51,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:00:51,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:51,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:51,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:51,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:00:51,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:51,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:51,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:00:51,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:51,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:51,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-03-10 22:00:51,921 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:59 [2021-03-10 22:00:52,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:52,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:52,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:00:52,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:52,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:52,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:00:52,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:52,371 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 22:00:52,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:52,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:52,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:52,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:52,386 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:00:52,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:52,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:52,399 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:00:52,627 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 22:00:52,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:52,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:52,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:52,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:00:52,640 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:52,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:52,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:00:52,650 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:52,858 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 22:00:52,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:52,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:52,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:52,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:52,873 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:00:52,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:52,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:00:52,886 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:00:53,075 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 22:00:53,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:53,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:00:53,081 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:173, output treesize:57 [2021-03-10 22:00:53,430 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:00:53,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:53,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:00:53,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188425628] [2021-03-10 22:00:53,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:00:53,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:53,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:00:53,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:53,431 INFO L87 Difference]: Start difference. First operand 1523 states and 5104 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:54,609 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-03-10 22:00:55,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:55,344 INFO L93 Difference]: Finished difference Result 1712 states and 5609 transitions. [2021-03-10 22:00:55,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:00:55,347 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:00:55,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:55,349 INFO L225 Difference]: With dead ends: 1712 [2021-03-10 22:00:55,349 INFO L226 Difference]: Without dead ends: 1646 [2021-03-10 22:00:55,350 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1847.3ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:00:55,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-03-10 22:00:55,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1523. [2021-03-10 22:00:55,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 3.3534822601839687) internal successors, (5104), 1522 states have internal predecessors, (5104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:55,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 5104 transitions. [2021-03-10 22:00:55,364 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 5104 transitions. Word has length 24 [2021-03-10 22:00:55,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:55,364 INFO L480 AbstractCegarLoop]: Abstraction has 1523 states and 5104 transitions. [2021-03-10 22:00:55,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:55,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 5104 transitions. [2021-03-10 22:00:55,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:00:55,366 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:55,366 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:55,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1884 [2021-03-10 22:00:55,566 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:55,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:55,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1122157306, now seen corresponding path program 247 times [2021-03-10 22:00:55,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:55,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022214453] [2021-03-10 22:00:55,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:56,005 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 22:00:56,216 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-03-10 22:00:56,419 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-03-10 22:00:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:00:56,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022214453] [2021-03-10 22:00:56,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671262768] [2021-03-10 22:00:56,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:56,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:00:56,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:56,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:56,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:56,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:00:56,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:56,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:56,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:00:56,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:57,074 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 22:00:57,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:57,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 22:00:57,079 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:91, output treesize:77 [2021-03-10 22:00:57,332 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-03-10 22:00:57,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:57,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:57,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:00:57,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:57,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:57,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:57,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:00:57,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:57,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:57,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:57,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:00:57,366 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:57,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:57,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:00:57,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:57,754 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-10 22:00:57,755 INFO L628 ElimStorePlain]: treesize reduction 57, result has 65.2 percent of original size [2021-03-10 22:00:57,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:57,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:57,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:57,769 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:00:57,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:00:57,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:57,782 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:00:57,929 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 22:00:57,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:57,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:57,934 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:189, output treesize:47 [2021-03-10 22:00:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:00:58,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:58,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:00:58,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640866638] [2021-03-10 22:00:58,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:00:58,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:58,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:00:58,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:58,232 INFO L87 Difference]: Start difference. First operand 1523 states and 5104 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:59,187 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-03-10 22:00:59,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:59,462 INFO L93 Difference]: Finished difference Result 1640 states and 5386 transitions. [2021-03-10 22:00:59,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:00:59,464 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:00:59,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:59,467 INFO L225 Difference]: With dead ends: 1640 [2021-03-10 22:00:59,467 INFO L226 Difference]: Without dead ends: 1587 [2021-03-10 22:00:59,467 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1841.0ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:00:59,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-03-10 22:00:59,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1523. [2021-03-10 22:00:59,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 3.3534822601839687) internal successors, (5104), 1522 states have internal predecessors, (5104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:59,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 5104 transitions. [2021-03-10 22:00:59,482 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 5104 transitions. Word has length 24 [2021-03-10 22:00:59,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:59,482 INFO L480 AbstractCegarLoop]: Abstraction has 1523 states and 5104 transitions. [2021-03-10 22:00:59,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:59,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 5104 transitions. [2021-03-10 22:00:59,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:00:59,484 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:59,484 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:59,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1895,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:59,684 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:59,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:59,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1786047620, now seen corresponding path program 248 times [2021-03-10 22:00:59,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:59,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114663001] [2021-03-10 22:00:59,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:00,303 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-03-10 22:01:00,395 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:01:00,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114663001] [2021-03-10 22:01:00,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381275180] [2021-03-10 22:01:00,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:00,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:00,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:00,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:01:00,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:00,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:00,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:00,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:01:00,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:00,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:00,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:01:00,689 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:00,791 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 22:01:00,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:00,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-03-10 22:01:00,805 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-03-10 22:01:01,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:01,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:01,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:01,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:01,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:01,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:01,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:01,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:01,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:01,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:01,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:01,617 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:01,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:01,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:01,630 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:01,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:01,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:01:01,718 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-03-10 22:01:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:01:01,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:01,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:01:01,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331395542] [2021-03-10 22:01:01,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:01:01,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:01,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:01:01,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:01,917 INFO L87 Difference]: Start difference. First operand 1523 states and 5104 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:03,004 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-03-10 22:01:03,355 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2021-03-10 22:01:03,557 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-03-10 22:01:03,810 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2021-03-10 22:01:04,148 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-03-10 22:01:04,607 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 22:01:05,003 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-10 22:01:05,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:05,114 INFO L93 Difference]: Finished difference Result 1743 states and 5680 transitions. [2021-03-10 22:01:05,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:01:05,117 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:01:05,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:05,119 INFO L225 Difference]: With dead ends: 1743 [2021-03-10 22:01:05,119 INFO L226 Difference]: Without dead ends: 1657 [2021-03-10 22:01:05,119 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2994.3ms TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:01:05,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-03-10 22:01:05,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1536. [2021-03-10 22:01:05,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 3.3530944625407164) internal successors, (5147), 1535 states have internal predecessors, (5147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:05,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 5147 transitions. [2021-03-10 22:01:05,135 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 5147 transitions. Word has length 24 [2021-03-10 22:01:05,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:05,135 INFO L480 AbstractCegarLoop]: Abstraction has 1536 states and 5147 transitions. [2021-03-10 22:01:05,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:05,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 5147 transitions. [2021-03-10 22:01:05,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:01:05,136 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:05,137 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:05,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1906,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:05,337 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:05,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:05,337 INFO L82 PathProgramCache]: Analyzing trace with hash 770947860, now seen corresponding path program 249 times [2021-03-10 22:01:05,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:05,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648016613] [2021-03-10 22:01:05,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:06,000 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:01:06,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648016613] [2021-03-10 22:01:06,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541430773] [2021-03-10 22:01:06,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:06,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:01:06,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:06,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:01:06,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:06,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:06,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:06,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:01:06,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:06,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:06,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:01:06,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:06,372 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 22:01:06,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:06,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-03-10 22:01:06,386 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-03-10 22:01:06,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:06,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:06,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:06,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:06,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:06,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:06,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:07,085 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 22:01:07,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:07,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:07,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:07,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:01:07,096 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:07,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:07,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:01:07,106 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:07,314 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 22:01:07,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:07,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:07,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:07,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:07,329 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:07,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:07,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:07,343 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:07,550 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 22:01:07,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:07,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:07,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:07,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:07,565 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:07,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:07,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:07,577 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:07,770 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 22:01:07,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:07,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:01:07,776 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:173, output treesize:57 [2021-03-10 22:01:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:01:08,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:08,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:01:08,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613396856] [2021-03-10 22:01:08,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:08,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:08,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:08,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:08,116 INFO L87 Difference]: Start difference. First operand 1536 states and 5147 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:09,080 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-03-10 22:01:09,454 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-03-10 22:01:09,826 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-03-10 22:01:09,997 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-03-10 22:01:10,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:10,796 INFO L93 Difference]: Finished difference Result 1825 states and 5879 transitions. [2021-03-10 22:01:10,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:01:10,798 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:01:10,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:10,801 INFO L225 Difference]: With dead ends: 1825 [2021-03-10 22:01:10,801 INFO L226 Difference]: Without dead ends: 1737 [2021-03-10 22:01:10,801 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2373.1ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:01:10,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2021-03-10 22:01:10,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1530. [2021-03-10 22:01:10,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1529 states have (on average 3.3564421190320473) internal successors, (5132), 1529 states have internal predecessors, (5132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:10,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 5132 transitions. [2021-03-10 22:01:10,817 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 5132 transitions. Word has length 24 [2021-03-10 22:01:10,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:10,817 INFO L480 AbstractCegarLoop]: Abstraction has 1530 states and 5132 transitions. [2021-03-10 22:01:10,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:10,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 5132 transitions. [2021-03-10 22:01:10,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:01:10,819 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:10,819 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:11,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1915,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:11,019 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:11,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:11,020 INFO L82 PathProgramCache]: Analyzing trace with hash 990243836, now seen corresponding path program 250 times [2021-03-10 22:01:11,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:11,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528813978] [2021-03-10 22:01:11,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:01:11,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528813978] [2021-03-10 22:01:11,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765259226] [2021-03-10 22:01:11,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:11,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:11,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:11,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:01:11,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:12,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:12,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:12,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:01:12,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:12,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:12,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:12,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:01:12,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:12,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:12,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:12,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:01:12,072 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:12,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:12,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:01:12,082 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:12,321 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 22:01:12,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:12,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 22:01:12,346 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-03-10 22:01:12,577 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-10 22:01:13,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:13,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:13,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:13,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:13,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:13,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:13,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:13,298 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-10 22:01:13,299 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-03-10 22:01:13,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:13,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:13,311 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:13,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:13,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:01:13,352 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:91, output treesize:12 [2021-03-10 22:01:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:01:13,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:13,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:01:13,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005514059] [2021-03-10 22:01:13,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:13,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:13,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:13,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:13,482 INFO L87 Difference]: Start difference. First operand 1530 states and 5132 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:14,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:14,603 INFO L93 Difference]: Finished difference Result 1658 states and 5427 transitions. [2021-03-10 22:01:14,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:01:14,605 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:01:14,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:14,608 INFO L225 Difference]: With dead ends: 1658 [2021-03-10 22:01:14,608 INFO L226 Difference]: Without dead ends: 1595 [2021-03-10 22:01:14,608 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1379.7ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:14,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2021-03-10 22:01:14,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1531. [2021-03-10 22:01:14,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 3.3522875816993465) internal successors, (5129), 1530 states have internal predecessors, (5129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:14,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 5129 transitions. [2021-03-10 22:01:14,622 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 5129 transitions. Word has length 24 [2021-03-10 22:01:14,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:14,622 INFO L480 AbstractCegarLoop]: Abstraction has 1531 states and 5129 transitions. [2021-03-10 22:01:14,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:14,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 5129 transitions. [2021-03-10 22:01:14,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:01:14,624 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:14,624 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:14,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1926,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:14,825 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:14,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:14,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1043392644, now seen corresponding path program 251 times [2021-03-10 22:01:14,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:14,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890171527] [2021-03-10 22:01:14,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:14,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:15,483 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-03-10 22:01:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:01:15,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890171527] [2021-03-10 22:01:15,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024623810] [2021-03-10 22:01:15,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:15,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:01:15,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:15,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:01:15,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:16,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:16,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:16,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:01:16,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:16,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:16,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:16,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:01:16,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:16,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:16,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:16,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:01:16,094 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:16,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:16,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:01:16,104 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:16,327 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 22:01:16,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:16,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 22:01:16,351 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-03-10 22:01:16,586 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-10 22:01:17,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:17,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:17,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:17,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:17,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:17,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:17,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:17,444 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-10 22:01:17,446 INFO L628 ElimStorePlain]: treesize reduction 102, result has 46.6 percent of original size [2021-03-10 22:01:17,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:17,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:17,459 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:17,599 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 22:01:17,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:17,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:17,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:17,610 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:17,748 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 22:01:17,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:17,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:17,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:17,762 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:17,867 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 22:01:17,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:17,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:01:17,870 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:205, output treesize:37 [2021-03-10 22:01:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:01:18,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:18,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:01:18,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137027288] [2021-03-10 22:01:18,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:01:18,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:18,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:01:18,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:18,156 INFO L87 Difference]: Start difference. First operand 1531 states and 5129 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:19,369 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-10 22:01:19,812 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 22:01:20,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:20,071 INFO L93 Difference]: Finished difference Result 1831 states and 5915 transitions. [2021-03-10 22:01:20,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:01:20,074 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:01:20,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:20,076 INFO L225 Difference]: With dead ends: 1831 [2021-03-10 22:01:20,076 INFO L226 Difference]: Without dead ends: 1740 [2021-03-10 22:01:20,077 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2071.0ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:01:20,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2021-03-10 22:01:20,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1524. [2021-03-10 22:01:20,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1523 states have (on average 3.3539067629678265) internal successors, (5108), 1523 states have internal predecessors, (5108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:20,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 5108 transitions. [2021-03-10 22:01:20,092 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 5108 transitions. Word has length 24 [2021-03-10 22:01:20,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:20,092 INFO L480 AbstractCegarLoop]: Abstraction has 1524 states and 5108 transitions. [2021-03-10 22:01:20,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:20,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 5108 transitions. [2021-03-10 22:01:20,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:01:20,094 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:20,094 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:20,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1933 [2021-03-10 22:01:20,294 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:20,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:20,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1217284814, now seen corresponding path program 252 times [2021-03-10 22:01:20,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:20,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253912909] [2021-03-10 22:01:20,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:20,902 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-10 22:01:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:01:21,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253912909] [2021-03-10 22:01:21,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363537712] [2021-03-10 22:01:21,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:21,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:01:21,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:21,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:01:21,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:21,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:21,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:21,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:01:21,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:21,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:21,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:01:21,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:21,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:21,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-03-10 22:01:21,506 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-03-10 22:01:21,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:21,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:21,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:21,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:21,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:21,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:21,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:22,037 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 22:01:22,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:22,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:22,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:22,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:01:22,050 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:22,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:22,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:01:22,061 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:22,306 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 22:01:22,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:22,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:22,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:22,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:22,321 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:22,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:22,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:22,334 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:22,580 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 22:01:22,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:22,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:22,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:22,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:22,596 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:22,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:22,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:22,610 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:22,843 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 22:01:22,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:22,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:01:22,847 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:193, output treesize:75 [2021-03-10 22:01:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:01:23,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:23,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:01:23,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730333345] [2021-03-10 22:01:23,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:01:23,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:23,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:01:23,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:23,421 INFO L87 Difference]: Start difference. First operand 1524 states and 5108 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:24,133 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2021-03-10 22:01:24,516 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-03-10 22:01:25,177 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2021-03-10 22:01:25,588 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-03-10 22:01:25,792 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 18 [2021-03-10 22:01:26,035 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-03-10 22:01:26,381 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 22:01:26,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:26,506 INFO L93 Difference]: Finished difference Result 1857 states and 5950 transitions. [2021-03-10 22:01:26,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:01:26,509 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:01:26,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:26,511 INFO L225 Difference]: With dead ends: 1857 [2021-03-10 22:01:26,511 INFO L226 Difference]: Without dead ends: 1764 [2021-03-10 22:01:26,512 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 3055.1ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:01:26,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2021-03-10 22:01:26,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1527. [2021-03-10 22:01:26,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 3.3538663171690692) internal successors, (5118), 1526 states have internal predecessors, (5118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:26,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 5118 transitions. [2021-03-10 22:01:26,527 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 5118 transitions. Word has length 24 [2021-03-10 22:01:26,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:26,528 INFO L480 AbstractCegarLoop]: Abstraction has 1527 states and 5118 transitions. [2021-03-10 22:01:26,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:26,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 5118 transitions. [2021-03-10 22:01:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:01:26,529 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:26,529 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:26,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1945,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:26,730 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:26,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:26,730 INFO L82 PathProgramCache]: Analyzing trace with hash 592100852, now seen corresponding path program 253 times [2021-03-10 22:01:26,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:26,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217711403] [2021-03-10 22:01:26,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:27,297 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 22:01:27,502 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-03-10 22:01:27,635 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:01:27,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217711403] [2021-03-10 22:01:27,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470793787] [2021-03-10 22:01:27,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:27,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:01:27,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:28,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:28,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:28,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:01:28,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:28,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:28,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:28,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:01:28,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:28,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:28,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:28,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:01:28,079 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:28,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:28,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:01:28,089 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:28,323 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 22:01:28,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:28,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 22:01:28,349 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-03-10 22:01:28,580 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-10 22:01:28,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:28,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:28,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:01:28,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:28,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:28,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:01:28,795 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:29,680 WARN L205 SmtUtils]: Spent 884.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 86 [2021-03-10 22:01:29,681 INFO L628 ElimStorePlain]: treesize reduction 183, result has 55.7 percent of original size [2021-03-10 22:01:29,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:29,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:29,693 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:30,030 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-10 22:01:30,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:30,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:30,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:30,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:01:30,044 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:30,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 22:01:30,055 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:30,405 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-10 22:01:30,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:30,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:30,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:30,421 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:30,768 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 22:01:30,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:30,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:30,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:30,784 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:31,147 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-10 22:01:31,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:31,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:31,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:31,161 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:31,506 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-10 22:01:31,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:31,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:31,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:31,523 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:31,822 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 22:01:31,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:31,823 INFO L518 ElimStorePlain]: Eliminatee v_prenex_997 vanished before elimination [2021-03-10 22:01:31,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:01:31,827 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:425, output treesize:102 [2021-03-10 22:01:32,036 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 22:01:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:01:32,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:32,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:01:32,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778768492] [2021-03-10 22:01:32,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:01:32,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:32,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:01:32,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:32,374 INFO L87 Difference]: Start difference. First operand 1527 states and 5118 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:33,692 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-10 22:01:34,179 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 22:01:34,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:34,492 INFO L93 Difference]: Finished difference Result 1907 states and 6129 transitions. [2021-03-10 22:01:34,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:01:34,495 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:01:34,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:34,498 INFO L225 Difference]: With dead ends: 1907 [2021-03-10 22:01:34,498 INFO L226 Difference]: Without dead ends: 1804 [2021-03-10 22:01:34,498 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2336.7ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:01:34,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2021-03-10 22:01:34,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1524. [2021-03-10 22:01:34,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1523 states have (on average 3.3539067629678265) internal successors, (5108), 1523 states have internal predecessors, (5108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:34,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 5108 transitions. [2021-03-10 22:01:34,514 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 5108 transitions. Word has length 24 [2021-03-10 22:01:34,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:34,514 INFO L480 AbstractCegarLoop]: Abstraction has 1524 states and 5108 transitions. [2021-03-10 22:01:34,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:34,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 5108 transitions. [2021-03-10 22:01:34,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:01:34,516 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:34,516 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:34,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1956,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:34,716 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:34,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:34,717 INFO L82 PathProgramCache]: Analyzing trace with hash -383513444, now seen corresponding path program 254 times [2021-03-10 22:01:34,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:34,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661539329] [2021-03-10 22:01:34,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:35,333 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:01:35,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661539329] [2021-03-10 22:01:35,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529929491] [2021-03-10 22:01:35,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:35,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:35,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:35,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:01:35,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:35,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:35,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:35,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:35,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:35,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:35,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:35,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:35,676 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 22:01:35,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:35,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 22:01:35,681 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:93, output treesize:79 [2021-03-10 22:01:36,128 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-03-10 22:01:36,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:36,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:36,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:01:36,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:36,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:36,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:36,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:36,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:36,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:01:36,161 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:36,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:36,171 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:36,379 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 22:01:36,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:36,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:36,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:36,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:36,395 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:36,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:36,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:36,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:01:36,410 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:36,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:36,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:36,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:36,426 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:36,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:36,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:01:36,439 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:36,646 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 22:01:36,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:36,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:01:36,652 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:173, output treesize:57 [2021-03-10 22:01:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:01:37,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:37,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:01:37,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945918133] [2021-03-10 22:01:37,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:37,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:37,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:37,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:37,011 INFO L87 Difference]: Start difference. First operand 1524 states and 5108 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:38,218 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-03-10 22:01:38,673 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-03-10 22:01:39,146 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-03-10 22:01:40,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:40,067 INFO L93 Difference]: Finished difference Result 1688 states and 5563 transitions. [2021-03-10 22:01:40,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:01:40,070 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:01:40,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:40,072 INFO L225 Difference]: With dead ends: 1688 [2021-03-10 22:01:40,072 INFO L226 Difference]: Without dead ends: 1635 [2021-03-10 22:01:40,073 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2365.3ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:01:40,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-03-10 22:01:40,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1527. [2021-03-10 22:01:40,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 3.3538663171690692) internal successors, (5118), 1526 states have internal predecessors, (5118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:40,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 5118 transitions. [2021-03-10 22:01:40,088 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 5118 transitions. Word has length 24 [2021-03-10 22:01:40,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:40,088 INFO L480 AbstractCegarLoop]: Abstraction has 1527 states and 5118 transitions. [2021-03-10 22:01:40,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:40,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 5118 transitions. [2021-03-10 22:01:40,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:01:40,090 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:40,090 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:40,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1964 [2021-03-10 22:01:40,291 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:40,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:40,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1943123386, now seen corresponding path program 255 times [2021-03-10 22:01:40,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:40,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571891419] [2021-03-10 22:01:40,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:40,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:01:40,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571891419] [2021-03-10 22:01:40,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84208735] [2021-03-10 22:01:40,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:40,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:01:40,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:40,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:01:40,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:41,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:41,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:41,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:41,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:41,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:41,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:41,182 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:41,299 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 22:01:41,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:41,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 22:01:41,305 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:93, output treesize:79 [2021-03-10 22:01:41,528 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-03-10 22:01:41,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:41,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:41,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:41,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:41,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:41,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:41,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:01:41,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:41,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:41,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:41,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:41,565 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:41,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:41,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:01:41,576 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:41,817 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 22:01:41,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:41,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:41,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:41,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:01:41,834 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:41,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:41,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:41,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:01:41,849 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:41,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:41,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:41,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:41,865 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:41,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:41,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:41,880 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:42,102 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 22:01:42,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:42,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:01:42,106 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:81 [2021-03-10 22:01:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:01:42,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:42,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:01:42,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987896076] [2021-03-10 22:01:42,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:01:42,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:42,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:01:42,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:42,653 INFO L87 Difference]: Start difference. First operand 1527 states and 5118 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:43,827 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-03-10 22:01:44,350 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-10 22:01:44,775 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-03-10 22:01:45,074 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-10 22:01:45,343 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 20 [2021-03-10 22:01:45,633 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-10 22:01:45,954 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-03-10 22:01:46,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:46,147 INFO L93 Difference]: Finished difference Result 1768 states and 5751 transitions. [2021-03-10 22:01:46,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:01:46,150 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:01:46,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:46,153 INFO L225 Difference]: With dead ends: 1768 [2021-03-10 22:01:46,153 INFO L226 Difference]: Without dead ends: 1680 [2021-03-10 22:01:46,153 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 3164.8ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:01:46,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2021-03-10 22:01:46,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1532. [2021-03-10 22:01:46,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 3.3598954931417375) internal successors, (5144), 1531 states have internal predecessors, (5144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:46,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 5144 transitions. [2021-03-10 22:01:46,169 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 5144 transitions. Word has length 24 [2021-03-10 22:01:46,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:46,169 INFO L480 AbstractCegarLoop]: Abstraction has 1532 states and 5144 transitions. [2021-03-10 22:01:46,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:46,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 5144 transitions. [2021-03-10 22:01:46,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:01:46,171 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:46,171 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:46,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1976,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:46,371 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:46,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:46,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1062849850, now seen corresponding path program 256 times [2021-03-10 22:01:46,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:46,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409223375] [2021-03-10 22:01:46,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:46,725 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 22:01:46,948 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 22:01:47,171 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-03-10 22:01:47,341 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-03-10 22:01:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:01:47,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409223375] [2021-03-10 22:01:47,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757933194] [2021-03-10 22:01:47,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:47,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:47,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:47,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:01:47,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:47,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:47,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:47,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:47,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:47,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:47,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:47,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:48,149 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 22:01:48,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:48,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:48,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:48,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:48,165 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:48,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:48,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:48,177 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:48,471 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 22:01:48,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:48,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 22:01:48,479 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-03-10 22:01:48,711 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 22:01:48,974 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-03-10 22:01:48,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:48,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:48,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:01:48,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:48,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:48,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:48,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:01:49,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:49,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:49,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:49,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:49,015 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:49,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:49,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:49,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:49,028 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:49,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:49,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:49,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:01:49,042 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:49,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:49,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:49,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:01:49,056 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:49,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:49,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:49,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:49,070 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:49,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:49,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:49,082 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:49,909 WARN L205 SmtUtils]: Spent 826.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-03-10 22:01:49,910 INFO L628 ElimStorePlain]: treesize reduction 164, result has 56.1 percent of original size [2021-03-10 22:01:49,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:49,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:49,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:01:49,928 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:49,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:49,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:49,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:49,946 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:49,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:49,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:49,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:01:49,965 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:49,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:49,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:49,983 INFO L550 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:50,310 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-10 22:01:50,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:50,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:01:50,315 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:425, output treesize:105 [2021-03-10 22:01:50,539 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 22:01:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:01:50,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:50,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:01:50,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105428458] [2021-03-10 22:01:50,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:01:50,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:50,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:01:50,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:50,897 INFO L87 Difference]: Start difference. First operand 1532 states and 5144 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:51,921 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-03-10 22:01:52,667 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-03-10 22:01:53,130 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-03-10 22:01:53,536 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2021-03-10 22:01:53,834 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-03-10 22:01:54,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:54,136 INFO L93 Difference]: Finished difference Result 1952 states and 6248 transitions. [2021-03-10 22:01:54,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:01:54,139 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:01:54,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:54,142 INFO L225 Difference]: With dead ends: 1952 [2021-03-10 22:01:54,142 INFO L226 Difference]: Without dead ends: 1838 [2021-03-10 22:01:54,142 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 3524.0ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:01:54,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2021-03-10 22:01:54,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1524. [2021-03-10 22:01:54,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1523 states have (on average 3.3539067629678265) internal successors, (5108), 1523 states have internal predecessors, (5108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:54,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 5108 transitions. [2021-03-10 22:01:54,159 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 5108 transitions. Word has length 24 [2021-03-10 22:01:54,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:54,159 INFO L480 AbstractCegarLoop]: Abstraction has 1524 states and 5108 transitions. [2021-03-10 22:01:54,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:54,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 5108 transitions. [2021-03-10 22:01:54,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:01:54,161 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:54,161 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:54,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1985 [2021-03-10 22:01:54,363 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:54,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:54,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1091951062, now seen corresponding path program 257 times [2021-03-10 22:01:54,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:54,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197492183] [2021-03-10 22:01:54,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:01:54,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197492183] [2021-03-10 22:01:54,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699090688] [2021-03-10 22:01:54,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:54,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:01:54,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:54,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:01:54,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:55,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:55,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:55,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:01:55,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:55,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:55,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:55,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:01:55,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:55,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:55,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:55,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:01:55,191 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:55,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:55,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:01:55,201 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:55,362 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 22:01:55,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:55,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 22:01:55,370 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:149, output treesize:121 [2021-03-10 22:01:55,553 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 22:01:55,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 22:01:55,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:55,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 22:01:55,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:55,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 22:01:55,969 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:55,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 22:01:55,979 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:56,056 INFO L628 ElimStorePlain]: treesize reduction 62, result has 19.5 percent of original size [2021-03-10 22:01:56,056 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 22:01:56,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:01:56,058 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:15 [2021-03-10 22:01:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:01:56,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:56,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:01:56,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995287275] [2021-03-10 22:01:56,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:01:56,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:56,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:01:56,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:01:56,186 INFO L87 Difference]: Start difference. First operand 1524 states and 5108 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:56,735 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 37 [2021-03-10 22:01:57,115 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-10 22:01:57,497 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2021-03-10 22:01:57,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:57,644 INFO L93 Difference]: Finished difference Result 1857 states and 5987 transitions. [2021-03-10 22:01:57,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:01:57,647 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:01:57,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:57,650 INFO L225 Difference]: With dead ends: 1857 [2021-03-10 22:01:57,650 INFO L226 Difference]: Without dead ends: 1784 [2021-03-10 22:01:57,650 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1868.1ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:01:57,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-03-10 22:01:57,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1539. [2021-03-10 22:01:57,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 3.3459037711313395) internal successors, (5146), 1538 states have internal predecessors, (5146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:57,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 5146 transitions. [2021-03-10 22:01:57,666 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 5146 transitions. Word has length 24 [2021-03-10 22:01:57,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:57,666 INFO L480 AbstractCegarLoop]: Abstraction has 1539 states and 5146 transitions. [2021-03-10 22:01:57,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:57,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 5146 transitions. [2021-03-10 22:01:57,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:01:57,668 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:57,668 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:57,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2003 [2021-03-10 22:01:57,868 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:57,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:57,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1100756016, now seen corresponding path program 258 times [2021-03-10 22:01:57,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:57,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732655603] [2021-03-10 22:01:57,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:58,377 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:01:58,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732655603] [2021-03-10 22:01:58,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702606257] [2021-03-10 22:01:58,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:58,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:01:58,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:58,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:01:58,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:58,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:58,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:58,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:01:58,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:58,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:58,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:58,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:01:58,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:58,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:58,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:58,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:01:58,615 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:58,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:58,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:01:58,625 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:58,791 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 22:01:58,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:58,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 22:01:58,798 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:149, output treesize:121 [2021-03-10 22:01:58,984 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 22:01:59,583 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-03-10 22:01:59,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:59,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:59,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:01:59,601 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:59,709 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-10 22:01:59,709 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-03-10 22:01:59,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:01:59,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:01:59,723 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:01:59,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:01:59,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:01:59,757 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:79, output treesize:12 [2021-03-10 22:01:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:01:59,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:59,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:01:59,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277274223] [2021-03-10 22:01:59,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:01:59,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:59,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:01:59,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:59,907 INFO L87 Difference]: Start difference. First operand 1539 states and 5146 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:00,648 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2021-03-10 22:02:01,154 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-03-10 22:02:01,411 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:02:01,905 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-10 22:02:02,331 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-10 22:02:02,588 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-10 22:02:03,046 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-10 22:02:03,461 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-03-10 22:02:03,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:03,587 INFO L93 Difference]: Finished difference Result 1849 states and 5960 transitions. [2021-03-10 22:02:03,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:02:03,590 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:02:03,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:03,593 INFO L225 Difference]: With dead ends: 1849 [2021-03-10 22:02:03,593 INFO L226 Difference]: Without dead ends: 1763 [2021-03-10 22:02:03,593 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 3614.7ms TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:02:03,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-03-10 22:02:03,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1547. [2021-03-10 22:02:03,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1547 states, 1546 states have (on average 3.3428201811125486) internal successors, (5168), 1546 states have internal predecessors, (5168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1547 states to 1547 states and 5168 transitions. [2021-03-10 22:02:03,610 INFO L78 Accepts]: Start accepts. Automaton has 1547 states and 5168 transitions. Word has length 24 [2021-03-10 22:02:03,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:03,610 INFO L480 AbstractCegarLoop]: Abstraction has 1547 states and 5168 transitions. [2021-03-10 22:02:03,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:03,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1547 states and 5168 transitions. [2021-03-10 22:02:03,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:02:03,612 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:03,612 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:03,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2010,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:03,813 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:03,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:03,813 INFO L82 PathProgramCache]: Analyzing trace with hash -637215800, now seen corresponding path program 259 times [2021-03-10 22:02:03,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:03,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816551683] [2021-03-10 22:02:03,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:04,342 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-03-10 22:02:04,505 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 22:02:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:02:04,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816551683] [2021-03-10 22:02:04,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46012238] [2021-03-10 22:02:04,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:04,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:02:04,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:04,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:04,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:04,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:02:04,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:04,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:04,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:04,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:02:04,778 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:04,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:04,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:04,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:02:04,789 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:04,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:04,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:02:04,799 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:04,957 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 22:02:04,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:04,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 22:02:04,965 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:149, output treesize:121 [2021-03-10 22:02:05,150 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 22:02:05,613 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_1016], 1=[o_4, v_prenex_1017]} [2021-03-10 22:02:05,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:02:05,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:05,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:02:05,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:06,019 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-03-10 22:02:06,020 INFO L628 ElimStorePlain]: treesize reduction 57, result has 62.3 percent of original size [2021-03-10 22:02:06,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:02:06,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:06,170 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 22:02:06,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:06,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:06,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:06,184 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:02:06,323 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 22:02:06,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:06,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:06,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:06,337 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:02:06,466 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 22:02:06,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:06,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:06,471 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-03-10 22:02:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:02:06,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:06,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:02:06,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64292328] [2021-03-10 22:02:06,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:02:06,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:06,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:02:06,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:02:06,792 INFO L87 Difference]: Start difference. First operand 1547 states and 5168 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:07,450 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 37 [2021-03-10 22:02:07,889 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2021-03-10 22:02:08,123 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 22:02:08,574 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 50 [2021-03-10 22:02:08,813 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-10 22:02:09,134 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-10 22:02:09,600 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 22:02:10,051 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 22:02:10,506 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-03-10 22:02:10,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:10,635 INFO L93 Difference]: Finished difference Result 1939 states and 6158 transitions. [2021-03-10 22:02:10,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:02:10,638 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:02:10,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:10,641 INFO L225 Difference]: With dead ends: 1939 [2021-03-10 22:02:10,641 INFO L226 Difference]: Without dead ends: 1863 [2021-03-10 22:02:10,641 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 4239.3ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:02:10,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2021-03-10 22:02:10,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1545. [2021-03-10 22:02:10,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.3452072538860103) internal successors, (5165), 1544 states have internal predecessors, (5165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:10,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5165 transitions. [2021-03-10 22:02:10,659 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5165 transitions. Word has length 24 [2021-03-10 22:02:10,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:10,659 INFO L480 AbstractCegarLoop]: Abstraction has 1545 states and 5165 transitions. [2021-03-10 22:02:10,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:10,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5165 transitions. [2021-03-10 22:02:10,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:02:10,660 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:10,661 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:10,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2016,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:10,861 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:10,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:10,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1795705428, now seen corresponding path program 260 times [2021-03-10 22:02:10,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:10,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802230868] [2021-03-10 22:02:10,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:11,491 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:02:11,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802230868] [2021-03-10 22:02:11,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195613932] [2021-03-10 22:02:11,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:11,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:11,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:11,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:02:11,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:11,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:11,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:11,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:02:11,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:11,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:02:11,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:11,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 22:02:11,798 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:51 [2021-03-10 22:02:12,178 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-03-10 22:02:12,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:02:12,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:12,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:02:12,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:12,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:12,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:12,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:12,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:12,305 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:02:12,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:12,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:12,319 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:02:12,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:12,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:02:12,397 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:25 [2021-03-10 22:02:12,626 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:02:12,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:12,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:02:12,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174908494] [2021-03-10 22:02:12,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:02:12,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:12,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:02:12,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:12,627 INFO L87 Difference]: Start difference. First operand 1545 states and 5165 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:13,112 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-03-10 22:02:14,393 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-03-10 22:02:14,815 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 30 [2021-03-10 22:02:15,489 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-03-10 22:02:15,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:15,641 INFO L93 Difference]: Finished difference Result 2275 states and 7104 transitions. [2021-03-10 22:02:15,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:02:15,644 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:02:15,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:15,647 INFO L225 Difference]: With dead ends: 2275 [2021-03-10 22:02:15,647 INFO L226 Difference]: Without dead ends: 2079 [2021-03-10 22:02:15,647 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2730.3ms TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:02:15,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2021-03-10 22:02:15,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 1558. [2021-03-10 22:02:15,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1558 states, 1557 states have (on average 3.342324983943481) internal successors, (5204), 1557 states have internal predecessors, (5204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:15,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 5204 transitions. [2021-03-10 22:02:15,666 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 5204 transitions. Word has length 24 [2021-03-10 22:02:15,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:15,666 INFO L480 AbstractCegarLoop]: Abstraction has 1558 states and 5204 transitions. [2021-03-10 22:02:15,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:15,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 5204 transitions. [2021-03-10 22:02:15,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:02:15,668 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:15,668 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:15,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2024 [2021-03-10 22:02:15,868 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:15,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:15,868 INFO L82 PathProgramCache]: Analyzing trace with hash -250672622, now seen corresponding path program 261 times [2021-03-10 22:02:15,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:15,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076515883] [2021-03-10 22:02:15,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:16,548 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-03-10 22:02:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:02:16,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076515883] [2021-03-10 22:02:16,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801301873] [2021-03-10 22:02:16,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:16,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:02:16,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:16,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:02:16,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:16,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:16,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:16,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:02:16,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:16,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:16,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:02:16,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:17,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:17,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-03-10 22:02:17,029 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:71, output treesize:57 [2021-03-10 22:02:17,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:17,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:17,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:02:17,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:17,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:17,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:02:17,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:18,072 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-10 22:02:18,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:18,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:18,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:18,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:18,088 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:02:18,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:18,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:18,101 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:02:18,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:18,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:02:18,188 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:77, output treesize:25 [2021-03-10 22:02:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:02:18,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:18,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:02:18,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449197803] [2021-03-10 22:02:18,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:02:18,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:18,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:02:18,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:18,383 INFO L87 Difference]: Start difference. First operand 1558 states and 5204 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:18,961 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-03-10 22:02:19,540 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2021-03-10 22:02:19,844 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 22:02:20,301 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-03-10 22:02:20,532 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-03-10 22:02:20,832 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2021-03-10 22:02:21,157 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 32 [2021-03-10 22:02:21,438 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 22:02:21,735 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-03-10 22:02:22,080 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-03-10 22:02:22,499 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-10 22:02:22,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:22,883 INFO L93 Difference]: Finished difference Result 1955 states and 6323 transitions. [2021-03-10 22:02:22,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:02:22,887 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:02:22,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:22,890 INFO L225 Difference]: With dead ends: 1955 [2021-03-10 22:02:22,890 INFO L226 Difference]: Without dead ends: 1884 [2021-03-10 22:02:22,890 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 4006.3ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:02:22,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2021-03-10 22:02:22,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1567. [2021-03-10 22:02:22,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1567 states, 1566 states have (on average 3.3403575989782888) internal successors, (5231), 1566 states have internal predecessors, (5231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:22,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 5231 transitions. [2021-03-10 22:02:22,909 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 5231 transitions. Word has length 24 [2021-03-10 22:02:22,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:22,909 INFO L480 AbstractCegarLoop]: Abstraction has 1567 states and 5231 transitions. [2021-03-10 22:02:22,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:22,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 5231 transitions. [2021-03-10 22:02:22,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:02:22,911 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:22,911 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:23,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2032,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:23,111 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:23,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:23,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1988644438, now seen corresponding path program 262 times [2021-03-10 22:02:23,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:23,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667731297] [2021-03-10 22:02:23,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:02:23,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667731297] [2021-03-10 22:02:23,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235462914] [2021-03-10 22:02:23,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:23,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:02:23,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:23,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:02:23,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:23,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:02:23,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:23,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:02:23,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:23,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:02:23,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:23,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:02:23,928 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:24,049 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-03-10 22:02:24,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:24,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:02:24,053 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-03-10 22:02:24,214 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-03-10 22:02:24,399 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 22:02:24,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:02:24,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:24,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:02:24,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:24,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:02:24,579 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:24,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:02:24,588 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:24,804 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:02:24,805 INFO L628 ElimStorePlain]: treesize reduction 42, result has 60.0 percent of original size [2021-03-10 22:02:24,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:24,818 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:02:24,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:24,830 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:02:24,933 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 22:02:24,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:24,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:24,937 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:133, output treesize:47 [2021-03-10 22:02:25,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:02:25,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:25,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:02:25,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206166761] [2021-03-10 22:02:25,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:02:25,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:25,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:02:25,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:02:25,275 INFO L87 Difference]: Start difference. First operand 1567 states and 5231 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:26,034 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-10 22:02:26,349 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 22:02:26,517 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 22:02:26,919 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 22:02:27,132 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 22:02:27,796 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-10 22:02:28,121 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 22:02:28,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:28,322 INFO L93 Difference]: Finished difference Result 2191 states and 6997 transitions. [2021-03-10 22:02:28,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:02:28,325 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:02:28,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:28,328 INFO L225 Difference]: With dead ends: 2191 [2021-03-10 22:02:28,328 INFO L226 Difference]: Without dead ends: 2111 [2021-03-10 22:02:28,329 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2992.8ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:02:28,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2021-03-10 22:02:28,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1573. [2021-03-10 22:02:28,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1573 states, 1572 states have (on average 3.3346055979643765) internal successors, (5242), 1572 states have internal predecessors, (5242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:28,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1573 states to 1573 states and 5242 transitions. [2021-03-10 22:02:28,348 INFO L78 Accepts]: Start accepts. Automaton has 1573 states and 5242 transitions. Word has length 24 [2021-03-10 22:02:28,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:28,348 INFO L480 AbstractCegarLoop]: Abstraction has 1573 states and 5242 transitions. [2021-03-10 22:02:28,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:28,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1573 states and 5242 transitions. [2021-03-10 22:02:28,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:02:28,350 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:28,350 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:28,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2041,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:28,550 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:28,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:28,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1168384238, now seen corresponding path program 263 times [2021-03-10 22:02:28,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:28,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699991695] [2021-03-10 22:02:28,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:29,204 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 22:02:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:02:29,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699991695] [2021-03-10 22:02:29,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431740689] [2021-03-10 22:02:29,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:29,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:02:29,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:29,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:02:29,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:29,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:29,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:29,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:02:29,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:29,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:29,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:29,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:02:29,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:29,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:29,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:29,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:02:29,839 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:29,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:29,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:02:29,851 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:30,079 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 22:02:30,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:30,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 22:02:30,104 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:161, output treesize:133 [2021-03-10 22:02:30,347 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 22:02:30,701 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 22:02:30,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:30,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:30,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:02:30,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:30,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:30,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:02:30,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:31,972 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2021-03-10 22:02:31,973 INFO L628 ElimStorePlain]: treesize reduction 170, result has 56.1 percent of original size [2021-03-10 22:02:31,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 22:02:31,986 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:31,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:31,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:02:32,000 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:32,375 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-10 22:02:32,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:32,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:32,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:32,393 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:02:32,814 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-10 22:02:32,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:32,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 22:02:32,827 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:33,172 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-10 22:02:33,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:33,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:33,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:33,189 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:02:33,515 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-10 22:02:33,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:33,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:33,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:02:33,529 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:33,851 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 22:02:33,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:33,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:02:33,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:33,868 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:02:34,173 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-10 22:02:34,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:34,174 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1029 vanished before elimination [2021-03-10 22:02:34,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:02:34,178 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:401, output treesize:96 [2021-03-10 22:02:34,411 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 22:02:34,844 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:02:34,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:34,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:02:34,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707215806] [2021-03-10 22:02:34,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:02:34,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:34,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:02:34,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:02:34,844 INFO L87 Difference]: Start difference. First operand 1573 states and 5242 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:35,909 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-03-10 22:02:36,677 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-03-10 22:02:37,090 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-10 22:02:37,614 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 55 [2021-03-10 22:02:38,116 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-03-10 22:02:38,943 WARN L205 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 58 [2021-03-10 22:02:39,306 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 22:02:39,593 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2021-03-10 22:02:40,019 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2021-03-10 22:02:40,473 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 53 [2021-03-10 22:02:41,004 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-03-10 22:02:41,316 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-03-10 22:02:41,684 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 22:02:42,261 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-03-10 22:02:42,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:42,572 INFO L93 Difference]: Finished difference Result 2207 states and 7012 transitions. [2021-03-10 22:02:42,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:02:42,575 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:02:42,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:42,579 INFO L225 Difference]: With dead ends: 2207 [2021-03-10 22:02:42,579 INFO L226 Difference]: Without dead ends: 2129 [2021-03-10 22:02:42,579 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 7815.5ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:02:42,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2021-03-10 22:02:42,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1584. [2021-03-10 22:02:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 3.346809854706254) internal successors, (5298), 1583 states have internal predecessors, (5298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:42,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 5298 transitions. [2021-03-10 22:02:42,597 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 5298 transitions. Word has length 24 [2021-03-10 22:02:42,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:42,597 INFO L480 AbstractCegarLoop]: Abstraction has 1584 states and 5298 transitions. [2021-03-10 22:02:42,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:42,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 5298 transitions. [2021-03-10 22:02:42,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:02:42,599 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:42,599 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:42,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2046 [2021-03-10 22:02:42,800 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:42,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:42,800 INFO L82 PathProgramCache]: Analyzing trace with hash -562183352, now seen corresponding path program 264 times [2021-03-10 22:02:42,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:42,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270248202] [2021-03-10 22:02:42,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:02:43,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270248202] [2021-03-10 22:02:43,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993782375] [2021-03-10 22:02:43,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:43,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:02:43,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:43,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:02:43,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:43,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:02:43,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:43,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:02:43,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:43,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:43,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:02:43,641 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:45, output treesize:31 [2021-03-10 22:02:43,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:02:43,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:43,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:02:43,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:43,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:02:43,881 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:43,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:02:43,891 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:44,034 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-10 22:02:44,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:44,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:44,048 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:02:44,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:02:44,060 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:02:44,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:44,073 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:02:44,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:44,086 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:02:44,226 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 22:02:44,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:44,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:02:44,230 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:129, output treesize:69 [2021-03-10 22:02:44,389 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-03-10 22:02:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:02:44,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:44,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:02:44,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707813709] [2021-03-10 22:02:44,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:02:44,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:44,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:02:44,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:02:44,777 INFO L87 Difference]: Start difference. First operand 1584 states and 5298 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:45,348 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-03-10 22:02:45,763 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-03-10 22:02:46,953 WARN L205 SmtUtils]: Spent 970.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-03-10 22:02:47,364 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-10 22:02:47,871 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 22:02:48,278 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-03-10 22:02:48,621 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 31 [2021-03-10 22:02:49,145 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-10 22:02:49,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:49,451 INFO L93 Difference]: Finished difference Result 2170 states and 6874 transitions. [2021-03-10 22:02:49,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:02:49,454 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:02:49,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:49,457 INFO L225 Difference]: With dead ends: 2170 [2021-03-10 22:02:49,457 INFO L226 Difference]: Without dead ends: 2098 [2021-03-10 22:02:49,458 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 4418.9ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:02:49,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-03-10 22:02:49,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1580. [2021-03-10 22:02:49,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.3407219759341356) internal successors, (5275), 1579 states have internal predecessors, (5275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:49,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5275 transitions. [2021-03-10 22:02:49,476 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5275 transitions. Word has length 24 [2021-03-10 22:02:49,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:49,476 INFO L480 AbstractCegarLoop]: Abstraction has 1580 states and 5275 transitions. [2021-03-10 22:02:49,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:49,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5275 transitions. [2021-03-10 22:02:49,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:02:49,478 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:49,478 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:49,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2056 [2021-03-10 22:02:49,678 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:49,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:49,679 INFO L82 PathProgramCache]: Analyzing trace with hash -172518212, now seen corresponding path program 265 times [2021-03-10 22:02:49,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:49,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743322902] [2021-03-10 22:02:49,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:02:50,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743322902] [2021-03-10 22:02:50,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106714102] [2021-03-10 22:02:50,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:50,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:02:50,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:50,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 22:02:50,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:50,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 22:02:50,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:50,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:50,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:02:50,549 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-03-10 22:02:50,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 22:02:50,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:50,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 22:02:50,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:50,959 INFO L628 ElimStorePlain]: treesize reduction 24, result has 38.5 percent of original size [2021-03-10 22:02:50,959 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 22:02:50,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:02:50,961 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:15 [2021-03-10 22:02:51,195 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:02:51,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:51,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:02:51,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940409362] [2021-03-10 22:02:51,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:02:51,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:51,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:02:51,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:51,196 INFO L87 Difference]: Start difference. First operand 1580 states and 5275 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:52,084 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-10 22:02:52,319 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-03-10 22:02:52,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:52,460 INFO L93 Difference]: Finished difference Result 1866 states and 6047 transitions. [2021-03-10 22:02:52,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:02:52,464 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:02:52,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:52,466 INFO L225 Difference]: With dead ends: 1866 [2021-03-10 22:02:52,466 INFO L226 Difference]: Without dead ends: 1769 [2021-03-10 22:02:52,467 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1430.2ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:02:52,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2021-03-10 22:02:52,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1561. [2021-03-10 22:02:52,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 3.3493589743589745) internal successors, (5225), 1560 states have internal predecessors, (5225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:52,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 5225 transitions. [2021-03-10 22:02:52,484 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 5225 transitions. Word has length 24 [2021-03-10 22:02:52,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:52,484 INFO L480 AbstractCegarLoop]: Abstraction has 1561 states and 5225 transitions. [2021-03-10 22:02:52,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:52,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 5225 transitions. [2021-03-10 22:02:52,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:02:52,486 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:52,486 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:52,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2063 [2021-03-10 22:02:52,686 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:52,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:52,687 INFO L82 PathProgramCache]: Analyzing trace with hash -276939526, now seen corresponding path program 266 times [2021-03-10 22:02:52,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:52,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605373799] [2021-03-10 22:02:52,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:53,249 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-03-10 22:02:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:02:53,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605373799] [2021-03-10 22:02:53,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145105807] [2021-03-10 22:02:53,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:53,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:53,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:53,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:02:53,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:53,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 22:02:53,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:53,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 22:02:53,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:53,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:53,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:02:53,716 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-03-10 22:02:54,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 22:02:54,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:54,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:54,146 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 22:02:54,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:02:54,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:14 [2021-03-10 22:02:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:02:54,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:54,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:02:54,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72208931] [2021-03-10 22:02:54,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:02:54,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:54,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:02:54,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:54,330 INFO L87 Difference]: Start difference. First operand 1561 states and 5225 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:55,009 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-10 22:02:55,222 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 22:02:55,431 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 22:02:55,769 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-03-10 22:02:56,007 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-03-10 22:02:56,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:56,119 INFO L93 Difference]: Finished difference Result 1904 states and 6159 transitions. [2021-03-10 22:02:56,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:02:56,123 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:02:56,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:56,126 INFO L225 Difference]: With dead ends: 1904 [2021-03-10 22:02:56,126 INFO L226 Difference]: Without dead ends: 1810 [2021-03-10 22:02:56,126 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2040.0ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:02:56,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2021-03-10 22:02:56,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1550. [2021-03-10 22:02:56,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.353131052291801) internal successors, (5194), 1549 states have internal predecessors, (5194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:56,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5194 transitions. [2021-03-10 22:02:56,143 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5194 transitions. Word has length 24 [2021-03-10 22:02:56,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:56,143 INFO L480 AbstractCegarLoop]: Abstraction has 1550 states and 5194 transitions. [2021-03-10 22:02:56,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:56,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5194 transitions. [2021-03-10 22:02:56,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:02:56,145 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:56,145 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:56,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2066,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:56,345 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:56,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:56,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1323711664, now seen corresponding path program 267 times [2021-03-10 22:02:56,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:56,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660551146] [2021-03-10 22:02:56,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:56,803 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-03-10 22:02:57,129 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:02:57,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660551146] [2021-03-10 22:02:57,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955301766] [2021-03-10 22:02:57,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:57,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:02:57,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:57,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:02:57,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:57,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 22:02:57,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:57,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 22:02:57,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:57,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:57,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:02:57,504 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-03-10 22:02:57,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 22:02:57,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:57,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:57,795 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 22:02:57,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:02:57,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:14 [2021-03-10 22:02:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:02:57,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:57,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:02:57,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75348718] [2021-03-10 22:02:57,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:02:57,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:57,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:02:57,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:57,964 INFO L87 Difference]: Start difference. First operand 1550 states and 5194 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:58,715 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-03-10 22:02:58,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:58,975 INFO L93 Difference]: Finished difference Result 1696 states and 5586 transitions. [2021-03-10 22:02:58,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:02:58,978 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:02:58,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:58,981 INFO L225 Difference]: With dead ends: 1696 [2021-03-10 22:02:58,981 INFO L226 Difference]: Without dead ends: 1665 [2021-03-10 22:02:58,981 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1321.9ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:58,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2021-03-10 22:02:58,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1564. [2021-03-10 22:02:58,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 3.3544465770953296) internal successors, (5243), 1563 states have internal predecessors, (5243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:58,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 5243 transitions. [2021-03-10 22:02:58,998 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 5243 transitions. Word has length 24 [2021-03-10 22:02:58,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:58,998 INFO L480 AbstractCegarLoop]: Abstraction has 1564 states and 5243 transitions. [2021-03-10 22:02:58,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:58,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 5243 transitions. [2021-03-10 22:02:59,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:02:59,000 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:59,000 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:59,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2069 [2021-03-10 22:02:59,200 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:59,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:59,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1058293842, now seen corresponding path program 268 times [2021-03-10 22:02:59,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:59,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381013089] [2021-03-10 22:02:59,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:59,775 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2021-03-10 22:03:00,026 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-03-10 22:03:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:03:00,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381013089] [2021-03-10 22:03:00,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076366762] [2021-03-10 22:03:00,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:00,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:03:00,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:00,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:03:00,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:00,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 22:03:00,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:00,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 22:03:00,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:00,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:00,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:03:00,478 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-03-10 22:03:00,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 22:03:00,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:00,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 22:03:00,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:00,884 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-03-10 22:03:00,885 INFO L628 ElimStorePlain]: treesize reduction 89, result has 34.1 percent of original size [2021-03-10 22:03:00,885 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 22:03:00,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 22:03:00,896 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:00,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:00,994 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1034 vanished before elimination [2021-03-10 22:03:00,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:03:00,996 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:37 [2021-03-10 22:03:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:03:01,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:01,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:03:01,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398952361] [2021-03-10 22:03:01,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:03:01,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:01,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:03:01,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:03:01,363 INFO L87 Difference]: Start difference. First operand 1564 states and 5243 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:02,248 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-03-10 22:03:02,431 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2021-03-10 22:03:02,771 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-03-10 22:03:02,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:02,912 INFO L93 Difference]: Finished difference Result 1832 states and 5937 transitions. [2021-03-10 22:03:02,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:03:02,916 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:03:02,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:02,919 INFO L225 Difference]: With dead ends: 1832 [2021-03-10 22:03:02,919 INFO L226 Difference]: Without dead ends: 1741 [2021-03-10 22:03:02,919 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1981.0ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:03:02,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2021-03-10 22:03:02,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 1561. [2021-03-10 22:03:02,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 3.353846153846154) internal successors, (5232), 1560 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:02,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 5232 transitions. [2021-03-10 22:03:02,936 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 5232 transitions. Word has length 24 [2021-03-10 22:03:02,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:02,936 INFO L480 AbstractCegarLoop]: Abstraction has 1561 states and 5232 transitions. [2021-03-10 22:03:02,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:02,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 5232 transitions. [2021-03-10 22:03:02,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:03:02,937 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:02,938 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:03,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2073 [2021-03-10 22:03:03,138 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:03,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:03,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1090502694, now seen corresponding path program 269 times [2021-03-10 22:03:03,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:03,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522098669] [2021-03-10 22:03:03,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:03,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:03,567 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 22:03:03,874 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-03-10 22:03:04,029 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 22:03:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:03:04,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522098669] [2021-03-10 22:03:04,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990966033] [2021-03-10 22:03:04,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:04,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:03:04,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:04,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:03:04,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:04,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 22:03:04,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:04,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 22:03:04,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:04,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:04,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:03:04,481 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-03-10 22:03:04,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 22:03:04,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:04,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 22:03:04,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:04,921 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-03-10 22:03:04,922 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-03-10 22:03:04,922 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-03-10 22:03:04,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 22:03:04,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:05,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:05,028 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1036 vanished before elimination [2021-03-10 22:03:05,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:03:05,031 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:40 [2021-03-10 22:03:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:03:05,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:05,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:03:05,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916336416] [2021-03-10 22:03:05,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:03:05,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:05,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:03:05,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:03:05,397 INFO L87 Difference]: Start difference. First operand 1561 states and 5232 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:06,177 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:03:06,510 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-03-10 22:03:06,737 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-03-10 22:03:07,045 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-10 22:03:07,416 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-03-10 22:03:07,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:07,467 INFO L93 Difference]: Finished difference Result 1875 states and 6112 transitions. [2021-03-10 22:03:07,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:03:07,471 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:03:07,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:07,474 INFO L225 Difference]: With dead ends: 1875 [2021-03-10 22:03:07,474 INFO L226 Difference]: Without dead ends: 1784 [2021-03-10 22:03:07,474 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2509.2ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:03:07,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-03-10 22:03:07,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1561. [2021-03-10 22:03:07,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 3.353846153846154) internal successors, (5232), 1560 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:07,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 5232 transitions. [2021-03-10 22:03:07,491 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 5232 transitions. Word has length 24 [2021-03-10 22:03:07,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:07,491 INFO L480 AbstractCegarLoop]: Abstraction has 1561 states and 5232 transitions. [2021-03-10 22:03:07,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:07,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 5232 transitions. [2021-03-10 22:03:07,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:03:07,493 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:07,493 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:07,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2078,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:07,693 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:07,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:07,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1383664260, now seen corresponding path program 270 times [2021-03-10 22:03:07,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:07,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499097128] [2021-03-10 22:03:07,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:03:08,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499097128] [2021-03-10 22:03:08,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190650425] [2021-03-10 22:03:08,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:08,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:03:08,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:08,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:03:08,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:08,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:08,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:08,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:03:08,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:08,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:08,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:08,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:03:08,728 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:08,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:08,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:08,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:03:08,742 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:08,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:08,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:03:08,755 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:09,036 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 22:03:09,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:09,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 22:03:09,061 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-03-10 22:03:09,352 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-10 22:03:10,046 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 43 [2021-03-10 22:03:10,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:10,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:10,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 22:03:10,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:10,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:10,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 22:03:10,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:10,590 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-10 22:03:10,591 INFO L628 ElimStorePlain]: treesize reduction 55, result has 38.2 percent of original size [2021-03-10 22:03:10,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:10,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:10,605 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:03:10,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:10,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:03:10,652 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:99, output treesize:12 [2021-03-10 22:03:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:03:10,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:10,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:03:10,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845190938] [2021-03-10 22:03:10,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:10,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:10,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:10,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:10,805 INFO L87 Difference]: Start difference. First operand 1561 states and 5232 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:11,482 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-03-10 22:03:12,183 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 78 [2021-03-10 22:03:12,523 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-03-10 22:03:12,715 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-03-10 22:03:12,996 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-10 22:03:13,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:13,275 INFO L93 Difference]: Finished difference Result 1800 states and 5846 transitions. [2021-03-10 22:03:13,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:03:13,279 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:03:13,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:13,281 INFO L225 Difference]: With dead ends: 1800 [2021-03-10 22:03:13,281 INFO L226 Difference]: Without dead ends: 1705 [2021-03-10 22:03:13,282 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2674.7ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:03:13,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-03-10 22:03:13,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1571. [2021-03-10 22:03:13,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 3.349044585987261) internal successors, (5258), 1570 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 5258 transitions. [2021-03-10 22:03:13,298 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 5258 transitions. Word has length 24 [2021-03-10 22:03:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:13,298 INFO L480 AbstractCegarLoop]: Abstraction has 1571 states and 5258 transitions. [2021-03-10 22:03:13,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 5258 transitions. [2021-03-10 22:03:13,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:03:13,300 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:13,300 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:13,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2083,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:13,500 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:13,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:13,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1173331220, now seen corresponding path program 271 times [2021-03-10 22:03:13,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:13,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278841417] [2021-03-10 22:03:13,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:13,950 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-03-10 22:03:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:03:14,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278841417] [2021-03-10 22:03:14,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106524110] [2021-03-10 22:03:14,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:14,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:03:14,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:14,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:14,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:14,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:03:14,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:14,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:14,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:14,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:03:14,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:14,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:14,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:14,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:03:14,785 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:14,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:14,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:03:14,797 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:15,053 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 22:03:15,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:15,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 22:03:15,078 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-03-10 22:03:15,374 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 22:03:15,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:15,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:15,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 22:03:15,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:15,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:15,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 22:03:15,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,445 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-10 22:03:16,447 INFO L628 ElimStorePlain]: treesize reduction 57, result has 66.3 percent of original size [2021-03-10 22:03:16,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:16,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:16,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:03:16,461 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 22:03:16,472 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,654 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 22:03:16,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:16,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:16,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:16,671 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:03:16,871 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 22:03:16,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:16,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:16,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:16,888 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:03:17,064 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 22:03:17,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:17,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:03:17,071 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:185, output treesize:47 [2021-03-10 22:03:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:03:17,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:17,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:03:17,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836397437] [2021-03-10 22:03:17,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:03:17,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:17,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:03:17,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:17,412 INFO L87 Difference]: Start difference. First operand 1571 states and 5258 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:18,046 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-03-10 22:03:18,661 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 44 [2021-03-10 22:03:18,964 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-03-10 22:03:19,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:19,386 INFO L93 Difference]: Finished difference Result 1868 states and 6000 transitions. [2021-03-10 22:03:19,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:03:19,389 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:03:19,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:19,392 INFO L225 Difference]: With dead ends: 1868 [2021-03-10 22:03:19,392 INFO L226 Difference]: Without dead ends: 1780 [2021-03-10 22:03:19,393 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2405.3ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:03:19,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2021-03-10 22:03:19,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1569. [2021-03-10 22:03:19,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1569 states, 1568 states have (on average 3.3526785714285716) internal successors, (5257), 1568 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:19,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 5257 transitions. [2021-03-10 22:03:19,410 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 5257 transitions. Word has length 24 [2021-03-10 22:03:19,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:19,410 INFO L480 AbstractCegarLoop]: Abstraction has 1569 states and 5257 transitions. [2021-03-10 22:03:19,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:19,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 5257 transitions. [2021-03-10 22:03:19,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:03:19,412 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:19,412 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:19,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2090,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:19,613 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:19,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:19,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1392627196, now seen corresponding path program 272 times [2021-03-10 22:03:19,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:19,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892174744] [2021-03-10 22:03:19,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:03:20,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892174744] [2021-03-10 22:03:20,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813338087] [2021-03-10 22:03:20,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:20,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:20,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:20,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:03:20,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:20,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:20,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:20,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:03:20,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:20,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:20,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:20,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:03:20,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:20,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:20,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:20,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:03:20,940 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:20,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:20,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:03:20,954 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:21,224 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 22:03:21,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:21,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 22:03:21,249 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-03-10 22:03:21,550 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 22:03:22,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:22,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 22:03:22,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:22,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:22,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:22,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 22:03:22,413 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:22,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:22,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:03:22,443 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:11 [2021-03-10 22:03:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:03:22,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:22,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:03:22,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904425342] [2021-03-10 22:03:22,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:03:22,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:22,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:03:22,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:03:22,533 INFO L87 Difference]: Start difference. First operand 1569 states and 5257 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:23,211 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-03-10 22:03:23,885 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 28 [2021-03-10 22:03:24,171 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-03-10 22:03:24,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:24,456 INFO L93 Difference]: Finished difference Result 1793 states and 5851 transitions. [2021-03-10 22:03:24,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:03:24,459 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:03:24,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:24,462 INFO L225 Difference]: With dead ends: 1793 [2021-03-10 22:03:24,462 INFO L226 Difference]: Without dead ends: 1774 [2021-03-10 22:03:24,463 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2102.6ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:03:24,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1774 states. [2021-03-10 22:03:24,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1774 to 1573. [2021-03-10 22:03:24,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1573 states, 1572 states have (on average 3.354325699745547) internal successors, (5273), 1572 states have internal predecessors, (5273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:24,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1573 states to 1573 states and 5273 transitions. [2021-03-10 22:03:24,481 INFO L78 Accepts]: Start accepts. Automaton has 1573 states and 5273 transitions. Word has length 24 [2021-03-10 22:03:24,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:24,481 INFO L480 AbstractCegarLoop]: Abstraction has 1573 states and 5273 transitions. [2021-03-10 22:03:24,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:24,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1573 states and 5273 transitions. [2021-03-10 22:03:24,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:03:24,483 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:24,483 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:24,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2098,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:24,684 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:24,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:24,684 INFO L82 PathProgramCache]: Analyzing trace with hash -641009284, now seen corresponding path program 273 times [2021-03-10 22:03:24,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:24,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735634880] [2021-03-10 22:03:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:25,372 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-10 22:03:25,527 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2021-03-10 22:03:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:03:25,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735634880] [2021-03-10 22:03:25,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900579977] [2021-03-10 22:03:25,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:25,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:03:25,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:25,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:03:25,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:26,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:26,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:26,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:03:26,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:26,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:03:26,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,223 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 22:03:26,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:26,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-03-10 22:03:26,248 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:77, output treesize:63 [2021-03-10 22:03:26,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:26,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:26,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:03:26,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:26,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:03:26,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:26,908 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 22:03:26,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:26,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:26,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:26,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:26,925 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:03:26,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:26,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:26,940 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:03:27,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:27,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:03:27,041 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:87, output treesize:31 [2021-03-10 22:03:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:03:27,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:27,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:03:27,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274560345] [2021-03-10 22:03:27,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:03:27,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:27,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:03:27,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:03:27,406 INFO L87 Difference]: Start difference. First operand 1573 states and 5273 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:28,172 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-03-10 22:03:28,536 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-03-10 22:03:28,982 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-03-10 22:03:29,842 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-03-10 22:03:30,118 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2021-03-10 22:03:30,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:30,228 INFO L93 Difference]: Finished difference Result 1930 states and 6240 transitions. [2021-03-10 22:03:30,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:03:30,232 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:03:30,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:30,235 INFO L225 Difference]: With dead ends: 1930 [2021-03-10 22:03:30,235 INFO L226 Difference]: Without dead ends: 1872 [2021-03-10 22:03:30,236 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 2851.6ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:03:30,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2021-03-10 22:03:30,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1575. [2021-03-10 22:03:30,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.355146124523507) internal successors, (5281), 1574 states have internal predecessors, (5281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:30,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5281 transitions. [2021-03-10 22:03:30,255 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5281 transitions. Word has length 24 [2021-03-10 22:03:30,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:30,255 INFO L480 AbstractCegarLoop]: Abstraction has 1575 states and 5281 transitions. [2021-03-10 22:03:30,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:30,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5281 transitions. [2021-03-10 22:03:30,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:03:30,257 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:30,257 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:30,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2105,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:30,457 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:30,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:30,457 INFO L82 PathProgramCache]: Analyzing trace with hash -814901454, now seen corresponding path program 274 times [2021-03-10 22:03:30,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:30,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658691738] [2021-03-10 22:03:30,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:30,848 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 22:03:31,129 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 22:03:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:03:31,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658691738] [2021-03-10 22:03:31,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553403075] [2021-03-10 22:03:31,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:31,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:03:31,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:31,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:03:31,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:31,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:31,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:31,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:03:31,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:31,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:31,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:31,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:03:31,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:31,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:31,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:31,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:03:31,931 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:31,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:31,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:03:31,943 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:32,178 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 22:03:32,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:32,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 22:03:32,203 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-03-10 22:03:32,485 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 22:03:32,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:32,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:32,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:03:32,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:32,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:32,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:03:32,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:33,808 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2021-03-10 22:03:33,809 INFO L628 ElimStorePlain]: treesize reduction 164, result has 57.6 percent of original size [2021-03-10 22:03:33,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:33,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:03:33,823 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:34,245 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-03-10 22:03:34,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:34,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 22:03:34,258 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:34,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:34,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:03:34,270 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:34,646 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-10 22:03:34,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:34,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:34,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:03:34,660 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:35,041 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-10 22:03:35,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:35,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:35,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:35,058 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:03:35,458 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 22:03:35,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:35,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:35,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:35,476 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:03:35,844 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-10 22:03:35,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:35,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:35,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:35,862 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:03:36,194 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-10 22:03:36,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:36,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:36,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:36,212 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:03:36,514 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-10 22:03:36,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:36,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:03:36,519 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:401, output treesize:96 [2021-03-10 22:03:36,747 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 22:03:37,144 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:03:37,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:37,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:03:37,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049214490] [2021-03-10 22:03:37,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:03:37,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:37,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:03:37,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:03:37,145 INFO L87 Difference]: Start difference. First operand 1575 states and 5281 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:38,439 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-10 22:03:38,740 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-10 22:03:39,164 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-10 22:03:39,780 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-10 22:03:39,954 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-03-10 22:03:40,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:40,215 INFO L93 Difference]: Finished difference Result 2096 states and 6732 transitions. [2021-03-10 22:03:40,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:03:40,218 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:03:40,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:40,228 INFO L225 Difference]: With dead ends: 2096 [2021-03-10 22:03:40,229 INFO L226 Difference]: Without dead ends: 2016 [2021-03-10 22:03:40,229 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 3494.1ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:03:40,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2021-03-10 22:03:40,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1578. [2021-03-10 22:03:40,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 3.3551046290424855) internal successors, (5291), 1577 states have internal predecessors, (5291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:40,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 5291 transitions. [2021-03-10 22:03:40,247 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 5291 transitions. Word has length 24 [2021-03-10 22:03:40,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:40,247 INFO L480 AbstractCegarLoop]: Abstraction has 1578 states and 5291 transitions. [2021-03-10 22:03:40,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:40,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 5291 transitions. [2021-03-10 22:03:40,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:03:40,249 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:40,249 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:40,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2113 [2021-03-10 22:03:40,449 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:40,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:40,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1136185596, now seen corresponding path program 275 times [2021-03-10 22:03:40,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:40,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863539469] [2021-03-10 22:03:40,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:41,069 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 22:03:41,234 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 22:03:41,381 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 22:03:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:03:41,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863539469] [2021-03-10 22:03:41,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642720641] [2021-03-10 22:03:41,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:41,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:03:41,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:41,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:03:41,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:41,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:41,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:41,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:03:41,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:41,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:41,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:41,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 22:03:41,948 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:41,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:41,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:41,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:03:41,961 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:41,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:41,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 22:03:41,972 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:42,220 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 22:03:42,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:42,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 22:03:42,245 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-03-10 22:03:42,542 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 22:03:42,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:42,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:42,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:03:42,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:42,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:42,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:03:42,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:43,837 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2021-03-10 22:03:43,838 INFO L628 ElimStorePlain]: treesize reduction 180, result has 53.7 percent of original size [2021-03-10 22:03:43,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:43,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:43,856 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:03:44,263 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-10 22:03:44,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:44,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:44,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 22:03:44,278 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:44,654 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-10 22:03:44,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:44,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-03-10 22:03:44,667 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:45,022 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-10 22:03:45,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:45,023 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1083 vanished before elimination [2021-03-10 22:03:45,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:45,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 22:03:45,035 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:45,405 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-03-10 22:03:45,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:45,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:45,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:45,424 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:03:45,768 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 22:03:45,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:45,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:03:45,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:03:45,789 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:03:46,119 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-10 22:03:46,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:46,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:03:46,125 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:401, output treesize:96 [2021-03-10 22:03:46,353 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 26 Received shutdown request... [2021-03-10 22:03:46,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2121,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:46,943 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 22:03:46,945 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 22:03:46,946 INFO L202 PluginConnector]: Adding new model chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 10:03:46 BasicIcfg [2021-03-10 22:03:46,946 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 22:03:46,946 INFO L168 Benchmark]: Toolchain (without parser) took 845629.04 ms. Allocated memory was 255.9 MB in the beginning and 534.8 MB in the end (delta: 278.9 MB). Free memory was 236.4 MB in the beginning and 366.8 MB in the end (delta: -130.4 MB). Peak memory consumption was 148.2 MB. Max. memory is 16.0 GB. [2021-03-10 22:03:46,946 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.7 MB in the end (delta: 157.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 22:03:46,946 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.51 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 22:03:46,946 INFO L168 Benchmark]: Boogie Preprocessor took 25.96 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 22:03:46,946 INFO L168 Benchmark]: RCFGBuilder took 331.03 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 225.5 MB in the end (delta: 7.9 MB). Peak memory consumption was 17.6 MB. Max. memory is 16.0 GB. [2021-03-10 22:03:46,946 INFO L168 Benchmark]: TraceAbstraction took 845239.73 ms. Allocated memory was 255.9 MB in the beginning and 534.8 MB in the end (delta: 278.9 MB). Free memory was 225.5 MB in the beginning and 366.8 MB in the end (delta: -141.3 MB). Peak memory consumption was 136.8 MB. Max. memory is 16.0 GB. [2021-03-10 22:03:46,947 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 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.7 MB in the end (delta: 157.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.51 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 25.96 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 331.03 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 225.5 MB in the end (delta: 7.9 MB). Peak memory consumption was 17.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 845239.73 ms. Allocated memory was 255.9 MB in the beginning and 534.8 MB in the end (delta: 278.9 MB). Free memory was 225.5 MB in the beginning and 366.8 MB in the end (delta: -141.3 MB). Peak memory consumption was 136.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 107). Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 845169.0ms, OverallIterations: 291, TraceHistogramMax: 5, EmptinessCheckTime: 442.9ms, AutomataDifference: 372150.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 17072 SDtfs, 27781 SDslu, 118417 SDs, 0 SdLazy, 132187 SolverSat, 7001 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 83583.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11253 GetRequests, 4531 SyntacticMatches, 567 SemanticMatches, 6155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26549 ImplicationChecksByTransitivity, 400539.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1584occurred in iteration=279, InterpolantAutomatonStates: 4218, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3935.6ms AutomataMinimizationTime, 290 MinimizatonAttempts, 77713 StatesRemovedByMinimization, 287 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1393.2ms SsaConstructionTime, 3913.5ms SatisfiabilityAnalysisTime, 396979.2ms InterpolantComputationTime, 13426 NumberOfCodeBlocks, 13379 NumberOfCodeBlocksAsserted, 980 NumberOfCheckSat, 12862 ConstructedInterpolants, 1150 QuantifiedInterpolants, 286193 SizeOfPredicates, 2711 NumberOfNonLiveVariables, 29467 ConjunctsInSsa, 6737 ConjunctsInUnsatCore, 564 InterpolantComputations, 16 PerfectInterpolantSequences, 3975/9258 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown