/usr/bin/java -Xmx8000000000 -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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 19:26:57,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 19:26:57,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 19:26:57,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 19:26:57,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 19:26:57,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 19:26:57,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 19:26:57,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 19:26:57,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 19:26:57,865 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 19:26:57,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 19:26:57,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 19:26:57,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 19:26:57,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 19:26:57,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 19:26:57,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 19:26:57,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-06 19:26:57,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 19:26:57,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 19:26:57,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 19:26:57,908 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-Delay.epf [2021-08-06 19:26:57,935 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 19:26:57,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 19:26:57,939 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 19:26:57,939 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 19:26:57,939 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 19:26:57,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 19:26:57,940 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 19:26:57,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 19:26:57,940 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 19:26:57,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 19:26:57,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 19:26:57,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 19:26:57,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 19:26:57,941 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 19:26:57,941 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 19:26:57,941 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 19:26:57,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 19:26:57,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 19:26:57,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 19:26:57,942 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 19:26:57,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 19:26:57,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:26:57,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 19:26:57,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 19:26:57,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 19:26:57,943 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 19:26:57,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 19:26:57,943 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 19:26:57,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 19:26:57,944 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 19:26:57,944 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 19:26:58,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 19:26:58,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 19:26:58,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 19:26:58,183 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 19:26:58,184 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 19:26:58,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl [2021-08-06 19:26:58,214 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl' [2021-08-06 19:26:58,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 19:26:58,264 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 19:26:58,265 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 19:26:58,265 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 19:26:58,265 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 19:26:58,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:26:58" (1/1) ... [2021-08-06 19:26:58,279 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:26:58" (1/1) ... [2021-08-06 19:26:58,285 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 19:26:58,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 19:26:58,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 19:26:58,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 19:26:58,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:26:58" (1/1) ... [2021-08-06 19:26:58,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:26:58" (1/1) ... [2021-08-06 19:26:58,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:26:58" (1/1) ... [2021-08-06 19:26:58,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:26:58" (1/1) ... [2021-08-06 19:26:58,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:26:58" (1/1) ... [2021-08-06 19:26:58,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:26:58" (1/1) ... [2021-08-06 19:26:58,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:26:58" (1/1) ... [2021-08-06 19:26:58,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 19:26:58,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 19:26:58,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 19:26:58,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 19:26:58,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:26:58" (1/1) ... [2021-08-06 19:26:58,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:26:58,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:26:58,335 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 19:26:58,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 19:26:58,365 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 19:26:58,365 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 19:26:58,366 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 19:26:58,366 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 19:26:58,366 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 19:26:58,366 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 19:26:58,366 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 19:26:58,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 19:26:58,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 19:26:58,367 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 19:26:58,516 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 19:26:58,516 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 19:26:58,517 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:26:58 BoogieIcfgContainer [2021-08-06 19:26:58,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 19:26:58,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 19:26:58,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 19:26:58,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 19:26:58,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:26:58" (1/2) ... [2021-08-06 19:26:58,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b4640a and model type array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 07:26:58, skipping insertion in model container [2021-08-06 19:26:58,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:26:58" (2/2) ... [2021-08-06 19:26:58,522 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.bpl [2021-08-06 19:26:58,526 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 19:26:58,527 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 19:26:58,528 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 19:26:58,528 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 19:26:58,573 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-06 19:26:58,617 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 19:26:58,623 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 19:26:58,624 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-06 19:26:58,692 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 52 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:26:58,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-06 19:26:58,703 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:26:58,704 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:26:58,704 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:26:58,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:26:58,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1391434589, now seen corresponding path program 1 times [2021-08-06 19:26:58,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:26:58,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281813132] [2021-08-06 19:26:58,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:26:58,715 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:26:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:26:58,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:26:58,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:26:58,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281813132] [2021-08-06 19:26:58,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281813132] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:26:58,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:26:58,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 19:26:58,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123273079] [2021-08-06 19:26:58,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:26:58,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:26:58,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:26:58,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:26:58,857 INFO L87 Difference]: Start difference. First operand has 53 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 52 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:26:58,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:26:58,892 INFO L93 Difference]: Finished difference Result 102 states and 132 transitions. [2021-08-06 19:26:58,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:26:58,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-06 19:26:58,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:26:58,899 INFO L225 Difference]: With dead ends: 102 [2021-08-06 19:26:58,899 INFO L226 Difference]: Without dead ends: 64 [2021-08-06 19:26:58,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:26:58,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-06 19:26:58,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2021-08-06 19:26:58,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.5471698113207548) internal successors, (82), 53 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:26:58,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 82 transitions. [2021-08-06 19:26:58,923 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 82 transitions. Word has length 11 [2021-08-06 19:26:58,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:26:58,924 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 82 transitions. [2021-08-06 19:26:58,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:26:58,924 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 82 transitions. [2021-08-06 19:26:58,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 19:26:58,926 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:26:58,926 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:26:58,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 19:26:58,927 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:26:58,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:26:58,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1852414552, now seen corresponding path program 1 times [2021-08-06 19:26:58,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:26:58,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866487336] [2021-08-06 19:26:58,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:26:58,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:26:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:26:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:26:59,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:26:59,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866487336] [2021-08-06 19:26:59,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866487336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:26:59,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270494307] [2021-08-06 19:26:59,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:26:59,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:26:59,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:26:59,040 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:26:59,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 19:26:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:26:59,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 19:26:59,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:26:59,111 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 53.3 percent of original size [2021-08-06 19:26:59,117 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 53.3 percent of original size [2021-08-06 19:26:59,352 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:26:59,358 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:26:59,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:26:59,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270494307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:26:59,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:26:59,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-06 19:26:59,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096950964] [2021-08-06 19:26:59,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:26:59,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:26:59,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:26:59,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:26:59,393 INFO L87 Difference]: Start difference. First operand 54 states and 82 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) 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) [2021-08-06 19:26:59,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:26:59,455 INFO L93 Difference]: Finished difference Result 107 states and 165 transitions. [2021-08-06 19:26:59,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:26:59,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) 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 14 [2021-08-06 19:26:59,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:26:59,456 INFO L225 Difference]: With dead ends: 107 [2021-08-06 19:26:59,456 INFO L226 Difference]: Without dead ends: 107 [2021-08-06 19:26:59,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:26:59,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-08-06 19:26:59,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 63. [2021-08-06 19:26:59,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 62 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:26:59,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 103 transitions. [2021-08-06 19:26:59,465 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 103 transitions. Word has length 14 [2021-08-06 19:26:59,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:26:59,466 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 103 transitions. [2021-08-06 19:26:59,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) 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) [2021-08-06 19:26:59,466 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 103 transitions. [2021-08-06 19:26:59,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 19:26:59,467 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:26:59,467 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:26:59,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-06 19:26:59,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:26:59,677 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:26:59,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:26:59,678 INFO L82 PathProgramCache]: Analyzing trace with hash -391546829, now seen corresponding path program 1 times [2021-08-06 19:26:59,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:26:59,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311060628] [2021-08-06 19:26:59,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:26:59,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:26:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:26:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:26:59,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:26:59,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311060628] [2021-08-06 19:26:59,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311060628] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:26:59,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:26:59,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 19:26:59,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939607289] [2021-08-06 19:26:59,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:26:59,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:26:59,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:26:59,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:26:59,741 INFO L87 Difference]: Start difference. First operand 63 states and 103 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:26:59,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:26:59,788 INFO L93 Difference]: Finished difference Result 115 states and 181 transitions. [2021-08-06 19:26:59,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:26:59,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 19:26:59,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:26:59,790 INFO L225 Difference]: With dead ends: 115 [2021-08-06 19:26:59,790 INFO L226 Difference]: Without dead ends: 115 [2021-08-06 19:26:59,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:26:59,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-08-06 19:26:59,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 72. [2021-08-06 19:26:59,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.676056338028169) internal successors, (119), 71 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:26:59,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 119 transitions. [2021-08-06 19:26:59,795 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 119 transitions. Word has length 14 [2021-08-06 19:26:59,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:26:59,795 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 119 transitions. [2021-08-06 19:26:59,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:26:59,796 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 119 transitions. [2021-08-06 19:26:59,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 19:26:59,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:26:59,796 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:26:59,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 19:26:59,796 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:26:59,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:26:59,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1497159667, now seen corresponding path program 2 times [2021-08-06 19:26:59,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:26:59,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406578363] [2021-08-06 19:26:59,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:26:59,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:26:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:26:59,841 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:26:59,842 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:26:59,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:26:59,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:26:59,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406578363] [2021-08-06 19:26:59,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406578363] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:26:59,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:26:59,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:26:59,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084932574] [2021-08-06 19:26:59,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 19:26:59,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:26:59,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 19:26:59,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:26:59,847 INFO L87 Difference]: Start difference. First operand 72 states and 119 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:26:59,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:26:59,885 INFO L93 Difference]: Finished difference Result 93 states and 151 transitions. [2021-08-06 19:26:59,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 19:26:59,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 19:26:59,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:26:59,886 INFO L225 Difference]: With dead ends: 93 [2021-08-06 19:26:59,887 INFO L226 Difference]: Without dead ends: 91 [2021-08-06 19:26:59,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:26:59,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-06 19:26:59,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2021-08-06 19:26:59,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.6619718309859155) internal successors, (118), 71 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:26:59,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 118 transitions. [2021-08-06 19:26:59,892 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 118 transitions. Word has length 14 [2021-08-06 19:26:59,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:26:59,892 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 118 transitions. [2021-08-06 19:26:59,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:26:59,892 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 118 transitions. [2021-08-06 19:26:59,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:26:59,893 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:26:59,893 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:26:59,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 19:26:59,893 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:26:59,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:26:59,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1137146360, now seen corresponding path program 1 times [2021-08-06 19:26:59,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:26:59,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741296563] [2021-08-06 19:26:59,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:26:59,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:26:59,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:26:59,940 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:26:59,941 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:26:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:26:59,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:26:59,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741296563] [2021-08-06 19:26:59,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741296563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:26:59,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561376081] [2021-08-06 19:26:59,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:26:59,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:26:59,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:26:59,953 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:26:59,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 19:26:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:26:59,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:26:59,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:00,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561376081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:00,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:00,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-08-06 19:27:00,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522796433] [2021-08-06 19:27:00,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:27:00,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:00,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:27:00,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:27:00,230 INFO L87 Difference]: Start difference. First operand 72 states and 118 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-08-06 19:27:00,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:00,297 INFO L93 Difference]: Finished difference Result 210 states and 320 transitions. [2021-08-06 19:27:00,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:27:00,297 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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 17 [2021-08-06 19:27:00,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:00,298 INFO L225 Difference]: With dead ends: 210 [2021-08-06 19:27:00,299 INFO L226 Difference]: Without dead ends: 202 [2021-08-06 19:27:00,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:27:00,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-06 19:27:00,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 110. [2021-08-06 19:27:00,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.6697247706422018) internal successors, (182), 109 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:00,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 182 transitions. [2021-08-06 19:27:00,306 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 182 transitions. Word has length 17 [2021-08-06 19:27:00,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:00,307 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 182 transitions. [2021-08-06 19:27:00,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-08-06 19:27:00,307 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 182 transitions. [2021-08-06 19:27:00,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:27:00,308 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:00,308 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:00,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:00,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:00,517 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:00,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:00,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1153852968, now seen corresponding path program 1 times [2021-08-06 19:27:00,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:00,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133213907] [2021-08-06 19:27:00,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:00,518 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:00,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:00,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:00,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133213907] [2021-08-06 19:27:00,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133213907] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:27:00,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:27:00,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 19:27:00,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840649863] [2021-08-06 19:27:00,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:27:00,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:00,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:27:00,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:27:00,603 INFO L87 Difference]: Start difference. First operand 110 states and 182 transitions. Second operand has 5 states, 5 states have (on average 3.4) 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) [2021-08-06 19:27:00,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:00,656 INFO L93 Difference]: Finished difference Result 164 states and 263 transitions. [2021-08-06 19:27:00,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:27:00,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) 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 [2021-08-06 19:27:00,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:00,657 INFO L225 Difference]: With dead ends: 164 [2021-08-06 19:27:00,657 INFO L226 Difference]: Without dead ends: 164 [2021-08-06 19:27:00,657 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:27:00,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-08-06 19:27:00,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 144. [2021-08-06 19:27:00,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.6853146853146854) internal successors, (241), 143 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:00,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 241 transitions. [2021-08-06 19:27:00,666 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 241 transitions. Word has length 17 [2021-08-06 19:27:00,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:00,667 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 241 transitions. [2021-08-06 19:27:00,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) 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) [2021-08-06 19:27:00,667 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 241 transitions. [2021-08-06 19:27:00,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:27:00,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:00,668 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:00,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 19:27:00,668 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:00,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:00,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1936107992, now seen corresponding path program 1 times [2021-08-06 19:27:00,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:00,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573664891] [2021-08-06 19:27:00,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:00,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:00,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:00,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:00,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573664891] [2021-08-06 19:27:00,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573664891] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:27:00,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:27:00,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:27:00,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926620032] [2021-08-06 19:27:00,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 19:27:00,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:00,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 19:27:00,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:27:00,720 INFO L87 Difference]: Start difference. First operand 144 states and 241 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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) [2021-08-06 19:27:00,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:00,776 INFO L93 Difference]: Finished difference Result 145 states and 224 transitions. [2021-08-06 19:27:00,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 19:27:00,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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 [2021-08-06 19:27:00,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:00,778 INFO L225 Difference]: With dead ends: 145 [2021-08-06 19:27:00,778 INFO L226 Difference]: Without dead ends: 121 [2021-08-06 19:27:00,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:27:00,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-06 19:27:00,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2021-08-06 19:27:00,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.565217391304348) internal successors, (180), 115 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:00,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 180 transitions. [2021-08-06 19:27:00,798 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 180 transitions. Word has length 17 [2021-08-06 19:27:00,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:00,798 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 180 transitions. [2021-08-06 19:27:00,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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) [2021-08-06 19:27:00,798 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 180 transitions. [2021-08-06 19:27:00,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:27:00,799 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:00,799 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:00,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-06 19:27:00,799 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:00,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:00,799 INFO L82 PathProgramCache]: Analyzing trace with hash -493789322, now seen corresponding path program 2 times [2021-08-06 19:27:00,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:00,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35910585] [2021-08-06 19:27:00,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:00,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:00,841 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:27:00,843 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:27:00,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:00,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:00,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35910585] [2021-08-06 19:27:00,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35910585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:00,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923450373] [2021-08-06 19:27:00,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:27:00,851 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:00,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:00,865 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:00,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 19:27:00,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:27:00,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:00,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:27:00,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:01,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923450373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:01,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:01,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-08-06 19:27:01,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554711701] [2021-08-06 19:27:01,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:27:01,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:01,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:27:01,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:27:01,130 INFO L87 Difference]: Start difference. First operand 116 states and 180 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-08-06 19:27:01,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:01,234 INFO L93 Difference]: Finished difference Result 241 states and 359 transitions. [2021-08-06 19:27:01,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:27:01,234 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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 17 [2021-08-06 19:27:01,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:01,236 INFO L225 Difference]: With dead ends: 241 [2021-08-06 19:27:01,236 INFO L226 Difference]: Without dead ends: 233 [2021-08-06 19:27:01,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:27:01,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-08-06 19:27:01,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 150. [2021-08-06 19:27:01,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.5838926174496644) internal successors, (236), 149 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:01,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 236 transitions. [2021-08-06 19:27:01,258 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 236 transitions. Word has length 17 [2021-08-06 19:27:01,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:01,258 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 236 transitions. [2021-08-06 19:27:01,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-08-06 19:27:01,258 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 236 transitions. [2021-08-06 19:27:01,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:27:01,259 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:01,259 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:01,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:01,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:01,468 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:01,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:01,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1797210006, now seen corresponding path program 2 times [2021-08-06 19:27:01,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:01,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883129069] [2021-08-06 19:27:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:01,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:01,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:01,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883129069] [2021-08-06 19:27:01,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883129069] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:27:01,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:27:01,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 19:27:01,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206654742] [2021-08-06 19:27:01,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:27:01,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:01,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:27:01,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:27:01,518 INFO L87 Difference]: Start difference. First operand 150 states and 236 transitions. Second operand has 5 states, 5 states have (on average 3.4) 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) [2021-08-06 19:27:01,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:01,556 INFO L93 Difference]: Finished difference Result 159 states and 249 transitions. [2021-08-06 19:27:01,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:27:01,557 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) 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 [2021-08-06 19:27:01,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:01,557 INFO L225 Difference]: With dead ends: 159 [2021-08-06 19:27:01,557 INFO L226 Difference]: Without dead ends: 159 [2021-08-06 19:27:01,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:27:01,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-08-06 19:27:01,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2021-08-06 19:27:01,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.5796178343949046) internal successors, (248), 157 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:01,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 248 transitions. [2021-08-06 19:27:01,561 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 248 transitions. Word has length 17 [2021-08-06 19:27:01,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:01,561 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 248 transitions. [2021-08-06 19:27:01,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) 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) [2021-08-06 19:27:01,561 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 248 transitions. [2021-08-06 19:27:01,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:27:01,561 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:01,562 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:01,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-06 19:27:01,562 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:01,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:01,562 INFO L82 PathProgramCache]: Analyzing trace with hash 278080531, now seen corresponding path program 3 times [2021-08-06 19:27:01,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:01,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822333549] [2021-08-06 19:27:01,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:01,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:01,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:01,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:01,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822333549] [2021-08-06 19:27:01,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822333549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:01,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945960032] [2021-08-06 19:27:01,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:27:01,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:01,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:01,625 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:01,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 19:27:01,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:27:01,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:01,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:27:01,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:01,893 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 96.2 percent of original size [2021-08-06 19:27:01,896 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 96.2 percent of original size [2021-08-06 19:27:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:01,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945960032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:01,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:01,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 11 [2021-08-06 19:27:01,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313006294] [2021-08-06 19:27:01,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:27:01,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:01,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:27:01,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:27:01,952 INFO L87 Difference]: Start difference. First operand 158 states and 248 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2021-08-06 19:27:02,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:02,184 INFO L93 Difference]: Finished difference Result 370 states and 580 transitions. [2021-08-06 19:27:02,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:27:02,185 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 20 [2021-08-06 19:27:02,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:02,186 INFO L225 Difference]: With dead ends: 370 [2021-08-06 19:27:02,186 INFO L226 Difference]: Without dead ends: 370 [2021-08-06 19:27:02,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 146.2ms TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:27:02,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-08-06 19:27:02,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 271. [2021-08-06 19:27:02,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.6851851851851851) internal successors, (455), 270 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:02,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 455 transitions. [2021-08-06 19:27:02,193 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 455 transitions. Word has length 20 [2021-08-06 19:27:02,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:02,195 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 455 transitions. [2021-08-06 19:27:02,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2021-08-06 19:27:02,195 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 455 transitions. [2021-08-06 19:27:02,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:27:02,195 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:02,195 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:02,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:02,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:02,405 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:02,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:02,405 INFO L82 PathProgramCache]: Analyzing trace with hash 84806056, now seen corresponding path program 4 times [2021-08-06 19:27:02,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:02,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441234150] [2021-08-06 19:27:02,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:02,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:02,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:02,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441234150] [2021-08-06 19:27:02,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441234150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:02,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438318420] [2021-08-06 19:27:02,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:27:02,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:02,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:02,453 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:02,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 19:27:02,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:27:02,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:02,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:27:02,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:02,668 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:27:02,669 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:27:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:02,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438318420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:02,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:02,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 19:27:02,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897663391] [2021-08-06 19:27:02,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:27:02,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:02,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:27:02,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:27:02,699 INFO L87 Difference]: Start difference. First operand 271 states and 455 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:02,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:02,781 INFO L93 Difference]: Finished difference Result 443 states and 725 transitions. [2021-08-06 19:27:02,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:27:02,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:27:02,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:02,783 INFO L225 Difference]: With dead ends: 443 [2021-08-06 19:27:02,783 INFO L226 Difference]: Without dead ends: 443 [2021-08-06 19:27:02,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:27:02,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-08-06 19:27:02,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 347. [2021-08-06 19:27:02,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.7138728323699421) internal successors, (593), 346 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:02,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 593 transitions. [2021-08-06 19:27:02,790 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 593 transitions. Word has length 20 [2021-08-06 19:27:02,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:02,790 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 593 transitions. [2021-08-06 19:27:02,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:02,790 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 593 transitions. [2021-08-06 19:27:02,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:27:02,791 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:02,791 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:02,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-06 19:27:03,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-06 19:27:03,007 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:03,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:03,008 INFO L82 PathProgramCache]: Analyzing trace with hash 921437569, now seen corresponding path program 5 times [2021-08-06 19:27:03,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:03,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588664169] [2021-08-06 19:27:03,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:03,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:03,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:03,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588664169] [2021-08-06 19:27:03,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588664169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:03,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612629539] [2021-08-06 19:27:03,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:27:03,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:03,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:03,069 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:03,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 19:27:03,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 19:27:03,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:03,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:27:03,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:03,296 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:27:03,297 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:27:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:03,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612629539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:03,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:03,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-08-06 19:27:03,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410486502] [2021-08-06 19:27:03,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:27:03,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:03,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:27:03,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:27:03,314 INFO L87 Difference]: Start difference. First operand 347 states and 593 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 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) [2021-08-06 19:27:03,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:03,406 INFO L93 Difference]: Finished difference Result 507 states and 873 transitions. [2021-08-06 19:27:03,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:27:03,406 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:27:03,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:03,408 INFO L225 Difference]: With dead ends: 507 [2021-08-06 19:27:03,408 INFO L226 Difference]: Without dead ends: 507 [2021-08-06 19:27:03,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:27:03,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-08-06 19:27:03,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 342. [2021-08-06 19:27:03,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.7096774193548387) internal successors, (583), 341 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:03,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 583 transitions. [2021-08-06 19:27:03,416 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 583 transitions. Word has length 20 [2021-08-06 19:27:03,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:03,416 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 583 transitions. [2021-08-06 19:27:03,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 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) [2021-08-06 19:27:03,417 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 583 transitions. [2021-08-06 19:27:03,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:27:03,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:03,417 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:03,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:03,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:03,621 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:03,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:03,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1020806782, now seen corresponding path program 6 times [2021-08-06 19:27:03,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:03,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967762687] [2021-08-06 19:27:03,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:03,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:03,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:03,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967762687] [2021-08-06 19:27:03,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967762687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:03,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409661422] [2021-08-06 19:27:03,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:27:03,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:03,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:03,682 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:03,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 19:27:03,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 19:27:03,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:03,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:27:03,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:03,860 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:27:03,861 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:27:03,892 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:27:03,893 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:27:03,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:03,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409661422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:03,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:03,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 19:27:03,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258557489] [2021-08-06 19:27:03,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:27:03,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:03,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:27:03,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:27:03,920 INFO L87 Difference]: Start difference. First operand 342 states and 583 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:03,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:03,989 INFO L93 Difference]: Finished difference Result 438 states and 711 transitions. [2021-08-06 19:27:03,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:27:03,989 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:27:03,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:03,991 INFO L225 Difference]: With dead ends: 438 [2021-08-06 19:27:03,991 INFO L226 Difference]: Without dead ends: 436 [2021-08-06 19:27:03,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:27:03,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-08-06 19:27:03,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 344. [2021-08-06 19:27:03,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 1.7026239067055393) internal successors, (584), 343 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) [2021-08-06 19:27:04,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 584 transitions. [2021-08-06 19:27:04,000 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 584 transitions. Word has length 20 [2021-08-06 19:27:04,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:04,000 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 584 transitions. [2021-08-06 19:27:04,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:04,000 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 584 transitions. [2021-08-06 19:27:04,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:27:04,002 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:04,002 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:04,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:04,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:04,213 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:04,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:04,214 INFO L82 PathProgramCache]: Analyzing trace with hash -228670616, now seen corresponding path program 7 times [2021-08-06 19:27:04,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:04,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129374434] [2021-08-06 19:27:04,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:04,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:04,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:04,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129374434] [2021-08-06 19:27:04,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129374434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:04,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927851716] [2021-08-06 19:27:04,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:27:04,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:04,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:04,264 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:04,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 19:27:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:04,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:27:04,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:04,425 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:27:04,427 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:27:04,501 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:27:04,502 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:27:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:04,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927851716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:04,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:04,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 19:27:04,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276795744] [2021-08-06 19:27:04,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:27:04,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:04,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:27:04,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:27:04,530 INFO L87 Difference]: Start difference. First operand 344 states and 584 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:04,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:04,612 INFO L93 Difference]: Finished difference Result 420 states and 686 transitions. [2021-08-06 19:27:04,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:27:04,613 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:27:04,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:04,614 INFO L225 Difference]: With dead ends: 420 [2021-08-06 19:27:04,614 INFO L226 Difference]: Without dead ends: 412 [2021-08-06 19:27:04,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:27:04,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-08-06 19:27:04,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 366. [2021-08-06 19:27:04,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 1.6849315068493151) internal successors, (615), 365 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:04,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 615 transitions. [2021-08-06 19:27:04,621 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 615 transitions. Word has length 20 [2021-08-06 19:27:04,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:04,621 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 615 transitions. [2021-08-06 19:27:04,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:04,621 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 615 transitions. [2021-08-06 19:27:04,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:27:04,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:04,622 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:04,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:04,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-06 19:27:04,841 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:04,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:04,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1662270516, now seen corresponding path program 8 times [2021-08-06 19:27:04,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:04,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309082735] [2021-08-06 19:27:04,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:04,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:04,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:04,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309082735] [2021-08-06 19:27:04,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309082735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:04,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867794836] [2021-08-06 19:27:04,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:27:04,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:04,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:04,897 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:04,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 19:27:05,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:27:05,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:05,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:27:05,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:05,193 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:27:05,194 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:27:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:05,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867794836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:05,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:05,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 19:27:05,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264968348] [2021-08-06 19:27:05,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:27:05,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:05,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:27:05,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:27:05,233 INFO L87 Difference]: Start difference. First operand 366 states and 615 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2021-08-06 19:27:05,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:05,348 INFO L93 Difference]: Finished difference Result 447 states and 736 transitions. [2021-08-06 19:27:05,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:27:05,348 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 20 [2021-08-06 19:27:05,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:05,350 INFO L225 Difference]: With dead ends: 447 [2021-08-06 19:27:05,350 INFO L226 Difference]: Without dead ends: 447 [2021-08-06 19:27:05,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:27:05,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-08-06 19:27:05,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 399. [2021-08-06 19:27:05,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 1.6909547738693467) internal successors, (673), 398 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:05,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 673 transitions. [2021-08-06 19:27:05,359 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 673 transitions. Word has length 20 [2021-08-06 19:27:05,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:05,359 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 673 transitions. [2021-08-06 19:27:05,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2021-08-06 19:27:05,359 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 673 transitions. [2021-08-06 19:27:05,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:27:05,360 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:05,360 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:05,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:05,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-06 19:27:05,577 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:05,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:05,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1268085421, now seen corresponding path program 9 times [2021-08-06 19:27:05,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:05,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544567231] [2021-08-06 19:27:05,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:05,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:05,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:05,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:05,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544567231] [2021-08-06 19:27:05,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544567231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:05,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988398478] [2021-08-06 19:27:05,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:27:05,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:05,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:05,625 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:05,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 19:27:05,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:27:05,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:05,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:27:05,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:05,962 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 97.0 percent of original size [2021-08-06 19:27:05,967 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 97.0 percent of original size [2021-08-06 19:27:06,060 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 97.4 percent of original size [2021-08-06 19:27:06,064 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 97.4 percent of original size [2021-08-06 19:27:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:06,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988398478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:06,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:06,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 12 [2021-08-06 19:27:06,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541080489] [2021-08-06 19:27:06,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:27:06,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:06,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:27:06,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:27:06,193 INFO L87 Difference]: Start difference. First operand 399 states and 673 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:06,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:06,701 INFO L93 Difference]: Finished difference Result 1145 states and 1885 transitions. [2021-08-06 19:27:06,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 19:27:06,702 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:27:06,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:06,705 INFO L225 Difference]: With dead ends: 1145 [2021-08-06 19:27:06,705 INFO L226 Difference]: Without dead ends: 1137 [2021-08-06 19:27:06,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 405.3ms TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:27:06,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-08-06 19:27:06,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 690. [2021-08-06 19:27:06,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 1.8388969521044993) internal successors, (1267), 689 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:06,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1267 transitions. [2021-08-06 19:27:06,721 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1267 transitions. Word has length 20 [2021-08-06 19:27:06,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:06,721 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 1267 transitions. [2021-08-06 19:27:06,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:06,721 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1267 transitions. [2021-08-06 19:27:06,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:27:06,722 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:06,722 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:06,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:06,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-06 19:27:06,933 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:06,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:06,933 INFO L82 PathProgramCache]: Analyzing trace with hash -293829667, now seen corresponding path program 1 times [2021-08-06 19:27:06,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:06,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600167037] [2021-08-06 19:27:06,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:06,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:07,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:07,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600167037] [2021-08-06 19:27:07,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600167037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:07,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058101026] [2021-08-06 19:27:07,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:07,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:07,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:07,003 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:07,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 19:27:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:07,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:27:07,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:07,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:07,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058101026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:07,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:07,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-08-06 19:27:07,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925477866] [2021-08-06 19:27:07,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:27:07,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:07,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:27:07,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:27:07,357 INFO L87 Difference]: Start difference. First operand 690 states and 1267 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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) [2021-08-06 19:27:07,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:07,463 INFO L93 Difference]: Finished difference Result 808 states and 1421 transitions. [2021-08-06 19:27:07,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:27:07,463 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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 23 [2021-08-06 19:27:07,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:07,466 INFO L225 Difference]: With dead ends: 808 [2021-08-06 19:27:07,466 INFO L226 Difference]: Without dead ends: 804 [2021-08-06 19:27:07,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:27:07,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-08-06 19:27:07,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 752. [2021-08-06 19:27:07,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 1.81491344873502) internal successors, (1363), 751 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:07,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1363 transitions. [2021-08-06 19:27:07,478 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1363 transitions. Word has length 23 [2021-08-06 19:27:07,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:07,478 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 1363 transitions. [2021-08-06 19:27:07,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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) [2021-08-06 19:27:07,478 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1363 transitions. [2021-08-06 19:27:07,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:27:07,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:07,479 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:07,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:07,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-06 19:27:07,697 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:07,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:07,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1742053475, now seen corresponding path program 1 times [2021-08-06 19:27:07,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:07,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727734056] [2021-08-06 19:27:07,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:07,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:07,739 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:27:07,742 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:27:07,760 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:27:07,761 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:27:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:07,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:07,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727734056] [2021-08-06 19:27:07,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727734056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:07,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118390711] [2021-08-06 19:27:07,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:07,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:07,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:07,768 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:07,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 19:27:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:07,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:27:07,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:08,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118390711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:08,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:08,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:27:08,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596943075] [2021-08-06 19:27:08,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:27:08,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:08,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:27:08,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:27:08,225 INFO L87 Difference]: Start difference. First operand 752 states and 1363 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-08-06 19:27:08,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:08,322 INFO L93 Difference]: Finished difference Result 779 states and 1394 transitions. [2021-08-06 19:27:08,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:27:08,323 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:27:08,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:08,325 INFO L225 Difference]: With dead ends: 779 [2021-08-06 19:27:08,325 INFO L226 Difference]: Without dead ends: 742 [2021-08-06 19:27:08,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:27:08,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-08-06 19:27:08,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 736. [2021-08-06 19:27:08,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 1.8149659863945578) internal successors, (1334), 735 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:08,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1334 transitions. [2021-08-06 19:27:08,337 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1334 transitions. Word has length 23 [2021-08-06 19:27:08,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:08,337 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 1334 transitions. [2021-08-06 19:27:08,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-08-06 19:27:08,337 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1334 transitions. [2021-08-06 19:27:08,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:27:08,338 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:08,338 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:08,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:08,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 19:27:08,553 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:08,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:08,553 INFO L82 PathProgramCache]: Analyzing trace with hash -2040906239, now seen corresponding path program 2 times [2021-08-06 19:27:08,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:08,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991470101] [2021-08-06 19:27:08,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:08,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:08,585 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:27:08,587 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:27:08,597 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:27:08,600 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:27:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:08,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:08,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991470101] [2021-08-06 19:27:08,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991470101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:08,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543741687] [2021-08-06 19:27:08,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:27:08,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:08,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:08,627 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:08,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 19:27:08,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:27:08,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:08,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:27:08,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:09,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543741687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:09,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:09,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-08-06 19:27:09,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753392513] [2021-08-06 19:27:09,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:27:09,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:09,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:27:09,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:27:09,062 INFO L87 Difference]: Start difference. First operand 736 states and 1334 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 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) [2021-08-06 19:27:09,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:09,204 INFO L93 Difference]: Finished difference Result 850 states and 1509 transitions. [2021-08-06 19:27:09,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:27:09,204 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:27:09,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:09,206 INFO L225 Difference]: With dead ends: 850 [2021-08-06 19:27:09,206 INFO L226 Difference]: Without dead ends: 850 [2021-08-06 19:27:09,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:27:09,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-08-06 19:27:09,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 798. [2021-08-06 19:27:09,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 1.808030112923463) internal successors, (1441), 797 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:09,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1441 transitions. [2021-08-06 19:27:09,219 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1441 transitions. Word has length 23 [2021-08-06 19:27:09,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:09,219 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 1441 transitions. [2021-08-06 19:27:09,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 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) [2021-08-06 19:27:09,220 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1441 transitions. [2021-08-06 19:27:09,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:27:09,221 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:09,221 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:09,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:09,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:09,437 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:09,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:09,437 INFO L82 PathProgramCache]: Analyzing trace with hash -201258559, now seen corresponding path program 2 times [2021-08-06 19:27:09,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:09,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538138468] [2021-08-06 19:27:09,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:09,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:09,491 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:27:09,493 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:27:09,503 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:27:09,506 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:27:09,524 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:27:09,525 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:27:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:09,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:09,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538138468] [2021-08-06 19:27:09,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538138468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:09,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36224190] [2021-08-06 19:27:09,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:27:09,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:09,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:09,531 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:09,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 19:27:09,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:27:09,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:09,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:27:09,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:09,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:09,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36224190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:09,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:09,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:27:09,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133018651] [2021-08-06 19:27:09,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:27:09,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:09,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:27:09,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:27:09,929 INFO L87 Difference]: Start difference. First operand 798 states and 1441 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) [2021-08-06 19:27:10,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:10,030 INFO L93 Difference]: Finished difference Result 788 states and 1411 transitions. [2021-08-06 19:27:10,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:27:10,030 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:27:10,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:10,033 INFO L225 Difference]: With dead ends: 788 [2021-08-06 19:27:10,033 INFO L226 Difference]: Without dead ends: 763 [2021-08-06 19:27:10,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:27:10,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-08-06 19:27:10,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 758. [2021-08-06 19:27:10,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 1.8058124174372523) internal successors, (1367), 757 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:10,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1367 transitions. [2021-08-06 19:27:10,044 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1367 transitions. Word has length 23 [2021-08-06 19:27:10,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:10,044 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 1367 transitions. [2021-08-06 19:27:10,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) [2021-08-06 19:27:10,044 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1367 transitions. [2021-08-06 19:27:10,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:27:10,045 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:10,045 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:10,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:10,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:10,257 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:10,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:10,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1811614639, now seen corresponding path program 3 times [2021-08-06 19:27:10,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:10,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225646386] [2021-08-06 19:27:10,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:10,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:10,299 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:27:10,300 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:27:10,309 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:27:10,312 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:27:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:10,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:10,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225646386] [2021-08-06 19:27:10,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225646386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:10,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113535638] [2021-08-06 19:27:10,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:27:10,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:10,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:10,335 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:10,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 19:27:10,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:27:10,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:10,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:27:10,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:27:10,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113535638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:10,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:10,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 7 [2021-08-06 19:27:10,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792996774] [2021-08-06 19:27:10,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:27:10,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:10,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:27:10,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:27:10,692 INFO L87 Difference]: Start difference. First operand 758 states and 1367 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-08-06 19:27:10,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:10,819 INFO L93 Difference]: Finished difference Result 931 states and 1636 transitions. [2021-08-06 19:27:10,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:27:10,819 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 23 [2021-08-06 19:27:10,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:10,821 INFO L225 Difference]: With dead ends: 931 [2021-08-06 19:27:10,821 INFO L226 Difference]: Without dead ends: 927 [2021-08-06 19:27:10,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:27:10,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-08-06 19:27:10,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 832. [2021-08-06 19:27:10,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 1.8134777376654634) internal successors, (1507), 831 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:10,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1507 transitions. [2021-08-06 19:27:10,835 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1507 transitions. Word has length 23 [2021-08-06 19:27:10,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:10,836 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 1507 transitions. [2021-08-06 19:27:10,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-08-06 19:27:10,836 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1507 transitions. [2021-08-06 19:27:10,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:27:10,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:10,837 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:10,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:11,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:11,053 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:11,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:11,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1509597533, now seen corresponding path program 3 times [2021-08-06 19:27:11,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:11,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589678947] [2021-08-06 19:27:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:11,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:11,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:11,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:11,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589678947] [2021-08-06 19:27:11,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589678947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:11,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633387961] [2021-08-06 19:27:11,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:27:11,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:11,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:11,113 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:11,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 19:27:11,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:27:11,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:11,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:27:11,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:11,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633387961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:11,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:11,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-08-06 19:27:11,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830597627] [2021-08-06 19:27:11,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:27:11,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:11,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:27:11,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:27:11,470 INFO L87 Difference]: Start difference. First operand 832 states and 1507 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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) [2021-08-06 19:27:11,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:11,637 INFO L93 Difference]: Finished difference Result 1020 states and 1772 transitions. [2021-08-06 19:27:11,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:27:11,638 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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 23 [2021-08-06 19:27:11,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:11,641 INFO L225 Difference]: With dead ends: 1020 [2021-08-06 19:27:11,641 INFO L226 Difference]: Without dead ends: 1020 [2021-08-06 19:27:11,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:27:11,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2021-08-06 19:27:11,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 897. [2021-08-06 19:27:11,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 1.7935267857142858) internal successors, (1607), 896 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:11,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1607 transitions. [2021-08-06 19:27:11,655 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1607 transitions. Word has length 23 [2021-08-06 19:27:11,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:11,655 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 1607 transitions. [2021-08-06 19:27:11,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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) [2021-08-06 19:27:11,655 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1607 transitions. [2021-08-06 19:27:11,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:27:11,656 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:11,656 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:11,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:11,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-06 19:27:11,873 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:11,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:11,873 INFO L82 PathProgramCache]: Analyzing trace with hash 215615837, now seen corresponding path program 4 times [2021-08-06 19:27:11,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:11,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057765775] [2021-08-06 19:27:11,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:11,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:11,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:11,912 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 74.1 percent of original size [2021-08-06 19:27:11,916 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 74.1 percent of original size [2021-08-06 19:27:11,932 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:27:11,933 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:27:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:11,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:11,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057765775] [2021-08-06 19:27:11,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057765775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:11,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47402777] [2021-08-06 19:27:11,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:27:11,939 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:11,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:11,939 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:11,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 19:27:12,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:27:12,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:12,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:27:12,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:12,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47402777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:12,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:12,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:27:12,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357852289] [2021-08-06 19:27:12,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:27:12,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:12,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:27:12,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:27:12,439 INFO L87 Difference]: Start difference. First operand 897 states and 1607 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2021-08-06 19:27:12,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:12,533 INFO L93 Difference]: Finished difference Result 940 states and 1666 transitions. [2021-08-06 19:27:12,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:27:12,534 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 23 [2021-08-06 19:27:12,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:12,536 INFO L225 Difference]: With dead ends: 940 [2021-08-06 19:27:12,536 INFO L226 Difference]: Without dead ends: 910 [2021-08-06 19:27:12,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:27:12,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-08-06 19:27:12,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 907. [2021-08-06 19:27:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 1.7880794701986755) internal successors, (1620), 906 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1620 transitions. [2021-08-06 19:27:12,547 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1620 transitions. Word has length 23 [2021-08-06 19:27:12,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:12,547 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 1620 transitions. [2021-08-06 19:27:12,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2021-08-06 19:27:12,547 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1620 transitions. [2021-08-06 19:27:12,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:27:12,548 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:12,548 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:12,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:12,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:12,761 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:12,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:12,761 INFO L82 PathProgramCache]: Analyzing trace with hash -612329297, now seen corresponding path program 5 times [2021-08-06 19:27:12,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:12,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129430315] [2021-08-06 19:27:12,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:12,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:12,791 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:27:12,793 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:27:12,803 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 74.1 percent of original size [2021-08-06 19:27:12,805 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 74.1 percent of original size [2021-08-06 19:27:12,823 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:27:12,824 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:27:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:12,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:12,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129430315] [2021-08-06 19:27:12,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129430315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:12,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808480139] [2021-08-06 19:27:12,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:27:12,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:12,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:12,831 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:12,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 19:27:13,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 19:27:13,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:13,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:27:13,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:13,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808480139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:13,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:13,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:27:13,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027610492] [2021-08-06 19:27:13,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:27:13,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:13,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:27:13,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:27:13,285 INFO L87 Difference]: Start difference. First operand 907 states and 1620 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) [2021-08-06 19:27:13,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:13,380 INFO L93 Difference]: Finished difference Result 956 states and 1689 transitions. [2021-08-06 19:27:13,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:27:13,380 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:27:13,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:13,382 INFO L225 Difference]: With dead ends: 956 [2021-08-06 19:27:13,382 INFO L226 Difference]: Without dead ends: 919 [2021-08-06 19:27:13,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:27:13,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2021-08-06 19:27:13,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 911. [2021-08-06 19:27:13,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 1.786813186813187) internal successors, (1626), 910 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:13,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1626 transitions. [2021-08-06 19:27:13,406 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1626 transitions. Word has length 23 [2021-08-06 19:27:13,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:13,406 INFO L470 AbstractCegarLoop]: Abstraction has 911 states and 1626 transitions. [2021-08-06 19:27:13,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) [2021-08-06 19:27:13,406 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1626 transitions. [2021-08-06 19:27:13,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:27:13,407 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:13,407 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:13,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:13,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:13,614 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:13,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:13,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1400543901, now seen corresponding path program 6 times [2021-08-06 19:27:13,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:13,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164300084] [2021-08-06 19:27:13,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:13,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:13,645 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:27:13,646 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:27:13,656 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 73.7 percent of original size [2021-08-06 19:27:13,659 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 73.7 percent of original size [2021-08-06 19:27:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:13,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:13,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164300084] [2021-08-06 19:27:13,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164300084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:13,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652880281] [2021-08-06 19:27:13,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:27:13,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:13,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:13,684 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:13,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 19:27:13,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:27:13,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:13,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:27:13,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:14,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652880281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:14,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:14,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-08-06 19:27:14,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443179446] [2021-08-06 19:27:14,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:27:14,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:14,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:27:14,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:27:14,122 INFO L87 Difference]: Start difference. First operand 911 states and 1626 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 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) [2021-08-06 19:27:14,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:14,245 INFO L93 Difference]: Finished difference Result 946 states and 1672 transitions. [2021-08-06 19:27:14,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:27:14,245 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:27:14,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:14,247 INFO L225 Difference]: With dead ends: 946 [2021-08-06 19:27:14,247 INFO L226 Difference]: Without dead ends: 946 [2021-08-06 19:27:14,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:27:14,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-08-06 19:27:14,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 926. [2021-08-06 19:27:14,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.7848648648648648) internal successors, (1651), 925 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:14,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1651 transitions. [2021-08-06 19:27:14,258 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1651 transitions. Word has length 23 [2021-08-06 19:27:14,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:14,258 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 1651 transitions. [2021-08-06 19:27:14,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 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) [2021-08-06 19:27:14,259 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1651 transitions. [2021-08-06 19:27:14,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:27:14,260 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:14,260 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:14,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:14,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:14,477 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:14,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:14,477 INFO L82 PathProgramCache]: Analyzing trace with hash 229045235, now seen corresponding path program 7 times [2021-08-06 19:27:14,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:14,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078618368] [2021-08-06 19:27:14,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:14,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:14,514 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:27:14,515 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:27:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:27:14,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:14,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078618368] [2021-08-06 19:27:14,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078618368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:14,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708416432] [2021-08-06 19:27:14,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:27:14,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:14,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:14,521 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:14,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 19:27:14,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:14,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:27:14,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:27:14,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708416432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:14,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:14,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-06 19:27:14,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191015755] [2021-08-06 19:27:14,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:27:14,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:14,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:27:14,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:27:14,971 INFO L87 Difference]: Start difference. First operand 926 states and 1651 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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) [2021-08-06 19:27:15,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:15,028 INFO L93 Difference]: Finished difference Result 1263 states and 2215 transitions. [2021-08-06 19:27:15,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:27:15,028 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 26 [2021-08-06 19:27:15,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:15,031 INFO L225 Difference]: With dead ends: 1263 [2021-08-06 19:27:15,031 INFO L226 Difference]: Without dead ends: 1259 [2021-08-06 19:27:15,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:27:15,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-08-06 19:27:15,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1153. [2021-08-06 19:27:15,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 1.7977430555555556) internal successors, (2071), 1152 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:15,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 2071 transitions. [2021-08-06 19:27:15,046 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 2071 transitions. Word has length 26 [2021-08-06 19:27:15,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:15,046 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 2071 transitions. [2021-08-06 19:27:15,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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) [2021-08-06 19:27:15,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 2071 transitions. [2021-08-06 19:27:15,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:27:15,047 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:15,047 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:15,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-06 19:27:15,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-06 19:27:15,265 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:15,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:15,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1766675809, now seen corresponding path program 8 times [2021-08-06 19:27:15,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:15,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873102880] [2021-08-06 19:27:15,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:15,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:15,303 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:27:15,304 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:27:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:27:15,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:15,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873102880] [2021-08-06 19:27:15,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873102880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:15,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972566878] [2021-08-06 19:27:15,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:27:15,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:15,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:15,311 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:15,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 19:27:15,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:27:15,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:15,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:27:15,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:15,846 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:27:15,846 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:27:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:15,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972566878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:15,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:15,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 9 [2021-08-06 19:27:15,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918427895] [2021-08-06 19:27:15,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:27:15,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:15,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:27:15,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:27:15,870 INFO L87 Difference]: Start difference. First operand 1153 states and 2071 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:16,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:16,141 INFO L93 Difference]: Finished difference Result 1777 states and 3036 transitions. [2021-08-06 19:27:16,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:27:16,142 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 19:27:16,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:16,146 INFO L225 Difference]: With dead ends: 1777 [2021-08-06 19:27:16,146 INFO L226 Difference]: Without dead ends: 1765 [2021-08-06 19:27:16,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:27:16,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2021-08-06 19:27:16,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1342. [2021-08-06 19:27:16,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 1.797166293810589) internal successors, (2410), 1341 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:16,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 2410 transitions. [2021-08-06 19:27:16,165 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 2410 transitions. Word has length 26 [2021-08-06 19:27:16,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:16,165 INFO L470 AbstractCegarLoop]: Abstraction has 1342 states and 2410 transitions. [2021-08-06 19:27:16,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:16,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 2410 transitions. [2021-08-06 19:27:16,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:27:16,166 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:16,167 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:16,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:16,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-06 19:27:16,381 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:16,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:16,381 INFO L82 PathProgramCache]: Analyzing trace with hash -802073293, now seen corresponding path program 9 times [2021-08-06 19:27:16,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:16,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359613806] [2021-08-06 19:27:16,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:16,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:16,419 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:27:16,420 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:27:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:16,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:16,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359613806] [2021-08-06 19:27:16,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359613806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:16,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928515890] [2021-08-06 19:27:16,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:27:16,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:16,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:16,428 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:16,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 19:27:16,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:27:16,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:16,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:27:16,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:17,004 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:27:17,005 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:27:17,029 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:17,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928515890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:17,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:17,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 10 [2021-08-06 19:27:17,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066561986] [2021-08-06 19:27:17,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:27:17,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:17,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:27:17,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:27:17,030 INFO L87 Difference]: Start difference. First operand 1342 states and 2410 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:17,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:17,374 INFO L93 Difference]: Finished difference Result 2170 states and 3736 transitions. [2021-08-06 19:27:17,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:27:17,375 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 19:27:17,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:17,380 INFO L225 Difference]: With dead ends: 2170 [2021-08-06 19:27:17,380 INFO L226 Difference]: Without dead ends: 2158 [2021-08-06 19:27:17,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 185.2ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:27:17,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-08-06 19:27:17,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1490. [2021-08-06 19:27:17,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 1.8025520483546005) internal successors, (2684), 1489 states have internal predecessors, (2684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:17,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 2684 transitions. [2021-08-06 19:27:17,402 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 2684 transitions. Word has length 26 [2021-08-06 19:27:17,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:17,402 INFO L470 AbstractCegarLoop]: Abstraction has 1490 states and 2684 transitions. [2021-08-06 19:27:17,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:17,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 2684 transitions. [2021-08-06 19:27:17,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:27:17,407 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:17,407 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:17,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:17,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-06 19:27:17,625 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:17,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:17,625 INFO L82 PathProgramCache]: Analyzing trace with hash 487516744, now seen corresponding path program 10 times [2021-08-06 19:27:17,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:17,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197455912] [2021-08-06 19:27:17,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:17,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:17,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:17,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197455912] [2021-08-06 19:27:17,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197455912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:17,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195304390] [2021-08-06 19:27:17,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:27:17,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:17,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:17,700 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:17,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 19:27:18,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:27:18,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:18,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:27:18,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:18,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195304390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:18,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:18,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-06 19:27:18,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557844269] [2021-08-06 19:27:18,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:27:18,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:18,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:27:18,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:27:18,179 INFO L87 Difference]: Start difference. First operand 1490 states and 2684 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:18,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:18,502 INFO L93 Difference]: Finished difference Result 1845 states and 3192 transitions. [2021-08-06 19:27:18,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:27:18,502 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 19:27:18,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:18,507 INFO L225 Difference]: With dead ends: 1845 [2021-08-06 19:27:18,507 INFO L226 Difference]: Without dead ends: 1841 [2021-08-06 19:27:18,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 202.6ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:27:18,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2021-08-06 19:27:18,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1505. [2021-08-06 19:27:18,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 1.7865691489361701) internal successors, (2687), 1504 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:18,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2687 transitions. [2021-08-06 19:27:18,523 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 2687 transitions. Word has length 29 [2021-08-06 19:27:18,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:18,523 INFO L470 AbstractCegarLoop]: Abstraction has 1505 states and 2687 transitions. [2021-08-06 19:27:18,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:18,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 2687 transitions. [2021-08-06 19:27:18,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:27:18,525 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:18,525 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:18,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:18,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:18,726 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:18,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:18,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1324148257, now seen corresponding path program 4 times [2021-08-06 19:27:18,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:18,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672020982] [2021-08-06 19:27:18,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:18,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:18,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:18,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672020982] [2021-08-06 19:27:18,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672020982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:18,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55696179] [2021-08-06 19:27:18,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:27:18,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:18,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:18,788 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:18,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 19:27:19,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:27:19,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:19,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:27:19,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:19,316 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:27:19,317 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:27:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:19,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55696179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:19,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:19,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 10 [2021-08-06 19:27:19,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414274414] [2021-08-06 19:27:19,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:27:19,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:19,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:27:19,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:27:19,336 INFO L87 Difference]: Start difference. First operand 1505 states and 2687 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:19,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:19,511 INFO L93 Difference]: Finished difference Result 2328 states and 3962 transitions. [2021-08-06 19:27:19,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:27:19,512 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 19:27:19,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:19,518 INFO L225 Difference]: With dead ends: 2328 [2021-08-06 19:27:19,518 INFO L226 Difference]: Without dead ends: 2328 [2021-08-06 19:27:19,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:27:19,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-08-06 19:27:19,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 1621. [2021-08-06 19:27:19,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 1.7907407407407407) internal successors, (2901), 1620 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) [2021-08-06 19:27:19,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2901 transitions. [2021-08-06 19:27:19,543 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2901 transitions. Word has length 29 [2021-08-06 19:27:19,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:19,543 INFO L470 AbstractCegarLoop]: Abstraction has 1621 states and 2901 transitions. [2021-08-06 19:27:19,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:19,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2901 transitions. [2021-08-06 19:27:19,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:27:19,545 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:19,545 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:19,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:19,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:19,764 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:19,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:19,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1238188616, now seen corresponding path program 5 times [2021-08-06 19:27:19,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:19,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474504262] [2021-08-06 19:27:19,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:19,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:19,839 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:27:19,842 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:27:19,864 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:27:19,866 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:27:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:19,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:19,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474504262] [2021-08-06 19:27:19,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474504262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:19,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20662945] [2021-08-06 19:27:19,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:27:19,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:19,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:19,872 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:19,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 19:27:20,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:27:20,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:20,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:27:20,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:20,392 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:20,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20662945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:20,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:20,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:27:20,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378474807] [2021-08-06 19:27:20,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:27:20,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:20,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:27:20,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:27:20,393 INFO L87 Difference]: Start difference. First operand 1621 states and 2901 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:20,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:20,628 INFO L93 Difference]: Finished difference Result 1751 states and 2970 transitions. [2021-08-06 19:27:20,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:27:20,628 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 19:27:20,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:20,632 INFO L225 Difference]: With dead ends: 1751 [2021-08-06 19:27:20,632 INFO L226 Difference]: Without dead ends: 1618 [2021-08-06 19:27:20,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:27:20,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2021-08-06 19:27:20,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1214. [2021-08-06 19:27:20,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 1.7831821929101401) internal successors, (2163), 1213 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:20,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 2163 transitions. [2021-08-06 19:27:20,647 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 2163 transitions. Word has length 29 [2021-08-06 19:27:20,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:20,647 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 2163 transitions. [2021-08-06 19:27:20,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:20,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 2163 transitions. [2021-08-06 19:27:20,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:27:20,649 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:20,649 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:20,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:20,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-06 19:27:20,868 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:20,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:20,868 INFO L82 PathProgramCache]: Analyzing trace with hash -651131875, now seen corresponding path program 11 times [2021-08-06 19:27:20,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:20,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585193462] [2021-08-06 19:27:20,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:20,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:20,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:20,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585193462] [2021-08-06 19:27:20,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585193462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:20,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435124555] [2021-08-06 19:27:20,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:27:20,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:20,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:20,937 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:20,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 19:27:21,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:27:21,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:21,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:27:21,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:21,459 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:27:21,460 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:27:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:21,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435124555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:21,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:21,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2021-08-06 19:27:21,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175656821] [2021-08-06 19:27:21,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:27:21,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:21,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:27:21,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:27:21,483 INFO L87 Difference]: Start difference. First operand 1214 states and 2163 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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) [2021-08-06 19:27:21,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:21,599 INFO L93 Difference]: Finished difference Result 2242 states and 3888 transitions. [2021-08-06 19:27:21,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:27:21,599 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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 29 [2021-08-06 19:27:21,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:21,602 INFO L225 Difference]: With dead ends: 2242 [2021-08-06 19:27:21,602 INFO L226 Difference]: Without dead ends: 2242 [2021-08-06 19:27:21,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:27:21,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-08-06 19:27:21,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 1658. [2021-08-06 19:27:21,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 1.8376584188292093) internal successors, (3045), 1657 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:21,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 3045 transitions. [2021-08-06 19:27:21,626 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 3045 transitions. Word has length 29 [2021-08-06 19:27:21,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:21,626 INFO L470 AbstractCegarLoop]: Abstraction has 1658 states and 3045 transitions. [2021-08-06 19:27:21,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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) [2021-08-06 19:27:21,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 3045 transitions. [2021-08-06 19:27:21,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:27:21,627 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:21,627 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:21,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:21,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-06 19:27:21,844 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:21,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:21,844 INFO L82 PathProgramCache]: Analyzing trace with hash 185499638, now seen corresponding path program 6 times [2021-08-06 19:27:21,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:21,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570002327] [2021-08-06 19:27:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:21,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:21,898 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:27:21,899 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:27:21,911 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:27:21,914 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:27:21,943 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:21,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:21,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570002327] [2021-08-06 19:27:21,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570002327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:21,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040849741] [2021-08-06 19:27:21,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:27:21,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:21,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:21,945 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:21,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 19:27:22,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:27:22,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:22,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:27:22,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:22,512 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:22,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040849741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:22,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:22,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2021-08-06 19:27:22,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661870585] [2021-08-06 19:27:22,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:27:22,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:22,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:27:22,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:27:22,513 INFO L87 Difference]: Start difference. First operand 1658 states and 3045 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:22,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:22,710 INFO L93 Difference]: Finished difference Result 1807 states and 3242 transitions. [2021-08-06 19:27:22,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:27:22,711 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 19:27:22,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:22,713 INFO L225 Difference]: With dead ends: 1807 [2021-08-06 19:27:22,713 INFO L226 Difference]: Without dead ends: 1807 [2021-08-06 19:27:22,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:27:22,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-08-06 19:27:22,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1650. [2021-08-06 19:27:22,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 1.840509399636143) internal successors, (3035), 1649 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:22,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 3035 transitions. [2021-08-06 19:27:22,739 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 3035 transitions. Word has length 29 [2021-08-06 19:27:22,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:22,739 INFO L470 AbstractCegarLoop]: Abstraction has 1650 states and 3035 transitions. [2021-08-06 19:27:22,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:22,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 3035 transitions. [2021-08-06 19:27:22,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:27:22,740 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:22,740 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:22,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:22,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:22,943 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:22,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:22,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1417430025, now seen corresponding path program 12 times [2021-08-06 19:27:22,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:22,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138910776] [2021-08-06 19:27:22,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:22,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:23,003 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:23,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:23,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138910776] [2021-08-06 19:27:23,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138910776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:23,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090136778] [2021-08-06 19:27:23,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:27:23,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:23,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:23,004 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:23,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 19:27:23,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:27:23,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:23,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:27:23,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:23,523 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:27:23,524 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:27:23,548 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:27:23,548 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:27:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:23,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090136778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:23,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:23,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 19:27:23,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773240700] [2021-08-06 19:27:23,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:27:23,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:23,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:27:23,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:27:23,575 INFO L87 Difference]: Start difference. First operand 1650 states and 3035 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:23,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:23,654 INFO L93 Difference]: Finished difference Result 2263 states and 4006 transitions. [2021-08-06 19:27:23,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:27:23,654 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 19:27:23,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:23,657 INFO L225 Difference]: With dead ends: 2263 [2021-08-06 19:27:23,657 INFO L226 Difference]: Without dead ends: 2261 [2021-08-06 19:27:23,657 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:27:23,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-08-06 19:27:23,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1877. [2021-08-06 19:27:23,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 1.8464818763326225) internal successors, (3464), 1876 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:23,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 3464 transitions. [2021-08-06 19:27:23,678 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 3464 transitions. Word has length 29 [2021-08-06 19:27:23,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:23,678 INFO L470 AbstractCegarLoop]: Abstraction has 1877 states and 3464 transitions. [2021-08-06 19:27:23,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:23,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 3464 transitions. [2021-08-06 19:27:23,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:27:23,680 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:23,680 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:23,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:23,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:23,893 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:23,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:23,893 INFO L82 PathProgramCache]: Analyzing trace with hash 579684733, now seen corresponding path program 7 times [2021-08-06 19:27:23,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:23,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195351620] [2021-08-06 19:27:23,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:23,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:23,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:23,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195351620] [2021-08-06 19:27:23,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195351620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:23,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792676713] [2021-08-06 19:27:23,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:27:23,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:23,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:23,948 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:23,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 19:27:24,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:24,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:27:24,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:24,534 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:27:24,535 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:27:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:24,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792676713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:24,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:24,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 9 [2021-08-06 19:27:24,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735895990] [2021-08-06 19:27:24,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:27:24,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:24,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:27:24,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:27:24,564 INFO L87 Difference]: Start difference. First operand 1877 states and 3464 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:24,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:24,691 INFO L93 Difference]: Finished difference Result 2219 states and 3943 transitions. [2021-08-06 19:27:24,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:27:24,691 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 19:27:24,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:24,694 INFO L225 Difference]: With dead ends: 2219 [2021-08-06 19:27:24,694 INFO L226 Difference]: Without dead ends: 2209 [2021-08-06 19:27:24,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:27:24,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2021-08-06 19:27:24,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 1852. [2021-08-06 19:27:24,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 1.8417071853052405) internal successors, (3409), 1851 states have internal predecessors, (3409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:24,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 3409 transitions. [2021-08-06 19:27:24,713 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 3409 transitions. Word has length 29 [2021-08-06 19:27:24,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:24,713 INFO L470 AbstractCegarLoop]: Abstraction has 1852 states and 3409 transitions. [2021-08-06 19:27:24,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:24,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 3409 transitions. [2021-08-06 19:27:24,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:27:24,715 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:24,715 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:24,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-06 19:27:24,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:24,920 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:24,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:24,920 INFO L82 PathProgramCache]: Analyzing trace with hash -625293859, now seen corresponding path program 13 times [2021-08-06 19:27:24,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:24,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970080416] [2021-08-06 19:27:24,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:24,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:24,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:24,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970080416] [2021-08-06 19:27:24,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970080416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:24,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572818023] [2021-08-06 19:27:24,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:27:24,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:24,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:24,981 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:24,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 19:27:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:25,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:27:25,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:25,518 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:27:25,519 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:27:25,571 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:27:25,572 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:27:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:25,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572818023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:25,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:25,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 19:27:25,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501776428] [2021-08-06 19:27:25,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:27:25,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:25,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:27:25,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:27:25,597 INFO L87 Difference]: Start difference. First operand 1852 states and 3409 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:25,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:25,669 INFO L93 Difference]: Finished difference Result 2224 states and 3938 transitions. [2021-08-06 19:27:25,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:27:25,669 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 19:27:25,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:25,672 INFO L225 Difference]: With dead ends: 2224 [2021-08-06 19:27:25,672 INFO L226 Difference]: Without dead ends: 2222 [2021-08-06 19:27:25,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:27:25,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-08-06 19:27:25,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1852. [2021-08-06 19:27:25,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 1.8411669367909238) internal successors, (3408), 1851 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:25,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 3408 transitions. [2021-08-06 19:27:25,692 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 3408 transitions. Word has length 29 [2021-08-06 19:27:25,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:25,692 INFO L470 AbstractCegarLoop]: Abstraction has 1852 states and 3408 transitions. [2021-08-06 19:27:25,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:25,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 3408 transitions. [2021-08-06 19:27:25,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:27:25,694 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:25,694 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:25,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-06 19:27:25,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-06 19:27:25,894 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:25,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:25,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1352903223, now seen corresponding path program 14 times [2021-08-06 19:27:25,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:25,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822743619] [2021-08-06 19:27:25,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:25,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:25,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:25,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822743619] [2021-08-06 19:27:25,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822743619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:25,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462542860] [2021-08-06 19:27:25,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:27:25,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:25,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:25,958 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:25,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 19:27:26,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:27:26,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:26,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:27:26,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:26,492 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:27:26,494 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:27:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:26,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462542860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:26,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:26,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 19:27:26,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755370519] [2021-08-06 19:27:26,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:27:26,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:26,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:27:26,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:27:26,668 INFO L87 Difference]: Start difference. First operand 1852 states and 3408 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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) [2021-08-06 19:27:26,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:26,766 INFO L93 Difference]: Finished difference Result 2254 states and 3972 transitions. [2021-08-06 19:27:26,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:27:26,767 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 29 [2021-08-06 19:27:26,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:26,770 INFO L225 Difference]: With dead ends: 2254 [2021-08-06 19:27:26,770 INFO L226 Difference]: Without dead ends: 2238 [2021-08-06 19:27:26,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:27:26,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2021-08-06 19:27:26,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 1837. [2021-08-06 19:27:26,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 1.8387799564270153) internal successors, (3376), 1836 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:26,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 3376 transitions. [2021-08-06 19:27:26,791 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 3376 transitions. Word has length 29 [2021-08-06 19:27:26,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:26,791 INFO L470 AbstractCegarLoop]: Abstraction has 1837 states and 3376 transitions. [2021-08-06 19:27:26,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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) [2021-08-06 19:27:26,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 3376 transitions. [2021-08-06 19:27:26,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:27:26,792 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:26,792 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:26,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:27,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 19:27:27,006 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:27,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:27,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1719062627, now seen corresponding path program 15 times [2021-08-06 19:27:27,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:27,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868275677] [2021-08-06 19:27:27,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:27,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:27,076 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:27,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:27,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868275677] [2021-08-06 19:27:27,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868275677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:27,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072366894] [2021-08-06 19:27:27,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:27:27,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:27,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:27,077 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:27,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 19:27:27,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:27:27,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:27,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:27:27,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:27,609 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:27:27,611 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:27:27,813 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:27,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072366894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:27,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:27,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 19:27:27,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687270036] [2021-08-06 19:27:27,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:27:27,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:27,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:27:27,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:27:27,814 INFO L87 Difference]: Start difference. First operand 1837 states and 3376 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:27,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:27,930 INFO L93 Difference]: Finished difference Result 2167 states and 3836 transitions. [2021-08-06 19:27:27,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:27:27,931 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 19:27:27,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:27,934 INFO L225 Difference]: With dead ends: 2167 [2021-08-06 19:27:27,934 INFO L226 Difference]: Without dead ends: 2139 [2021-08-06 19:27:27,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:27:27,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2021-08-06 19:27:27,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 1847. [2021-08-06 19:27:27,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1846 states have (on average 1.83477789815818) internal successors, (3387), 1846 states have internal predecessors, (3387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:27,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 3387 transitions. [2021-08-06 19:27:27,957 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 3387 transitions. Word has length 29 [2021-08-06 19:27:27,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:27,957 INFO L470 AbstractCegarLoop]: Abstraction has 1847 states and 3387 transitions. [2021-08-06 19:27:27,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:27,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 3387 transitions. [2021-08-06 19:27:27,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:27:27,959 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:27,959 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:27,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:28,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-06 19:27:28,173 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:28,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:28,173 INFO L82 PathProgramCache]: Analyzing trace with hash 750379912, now seen corresponding path program 8 times [2021-08-06 19:27:28,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:28,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360662472] [2021-08-06 19:27:28,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:28,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:28,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:28,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360662472] [2021-08-06 19:27:28,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360662472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:28,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23609801] [2021-08-06 19:27:28,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:27:28,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:28,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:28,234 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:28,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 19:27:28,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:27:28,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:28,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:27:28,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:28,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23609801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:28,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:28,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 19:27:28,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785777695] [2021-08-06 19:27:28,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:27:28,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:28,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:27:28,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:27:28,864 INFO L87 Difference]: Start difference. First operand 1847 states and 3387 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-08-06 19:27:29,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:29,012 INFO L93 Difference]: Finished difference Result 2183 states and 3867 transitions. [2021-08-06 19:27:29,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:27:29,012 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 29 [2021-08-06 19:27:29,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:29,015 INFO L225 Difference]: With dead ends: 2183 [2021-08-06 19:27:29,015 INFO L226 Difference]: Without dead ends: 2182 [2021-08-06 19:27:29,015 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:27:29,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2021-08-06 19:27:29,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1937. [2021-08-06 19:27:29,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 1.8207644628099173) internal successors, (3525), 1936 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:29,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 3525 transitions. [2021-08-06 19:27:29,036 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 3525 transitions. Word has length 29 [2021-08-06 19:27:29,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:29,036 INFO L470 AbstractCegarLoop]: Abstraction has 1937 states and 3525 transitions. [2021-08-06 19:27:29,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-08-06 19:27:29,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 3525 transitions. [2021-08-06 19:27:29,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:27:29,038 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:29,038 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:29,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:29,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 19:27:29,253 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:29,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:29,253 INFO L82 PathProgramCache]: Analyzing trace with hash -543601784, now seen corresponding path program 16 times [2021-08-06 19:27:29,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:29,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751347168] [2021-08-06 19:27:29,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:29,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:29,300 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:27:29,302 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:27:29,321 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:27:29,322 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:27:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:29,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:29,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751347168] [2021-08-06 19:27:29,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751347168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:29,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683558738] [2021-08-06 19:27:29,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:27:29,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:29,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:29,329 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:29,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 19:27:29,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:27:29,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:29,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:27:29,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:30,082 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:30,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683558738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:30,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:30,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 19:27:30,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792635071] [2021-08-06 19:27:30,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:27:30,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:30,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:27:30,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:27:30,083 INFO L87 Difference]: Start difference. First operand 1937 states and 3525 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:30,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:30,268 INFO L93 Difference]: Finished difference Result 1194 states and 1991 transitions. [2021-08-06 19:27:30,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:27:30,269 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 19:27:30,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:30,270 INFO L225 Difference]: With dead ends: 1194 [2021-08-06 19:27:30,270 INFO L226 Difference]: Without dead ends: 1128 [2021-08-06 19:27:30,271 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:27:30,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-08-06 19:27:30,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 798. [2021-08-06 19:27:30,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 1.6813048933500627) internal successors, (1340), 797 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:30,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1340 transitions. [2021-08-06 19:27:30,279 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1340 transitions. Word has length 29 [2021-08-06 19:27:30,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:30,279 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 1340 transitions. [2021-08-06 19:27:30,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:30,279 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1340 transitions. [2021-08-06 19:27:30,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:27:30,280 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:30,280 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:30,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:30,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 19:27:30,485 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:30,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:30,485 INFO L82 PathProgramCache]: Analyzing trace with hash 641326280, now seen corresponding path program 17 times [2021-08-06 19:27:30,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:30,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934794736] [2021-08-06 19:27:30,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:30,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:30,527 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:27:30,528 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:27:30,535 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:27:30,537 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:27:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:27:30,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:30,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934794736] [2021-08-06 19:27:30,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934794736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:30,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370236825] [2021-08-06 19:27:30,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:27:30,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:30,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:30,567 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:30,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 19:27:31,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:27:31,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:31,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:27:31,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:31,248 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:27:31,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370236825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:31,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:31,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 19:27:31,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895686233] [2021-08-06 19:27:31,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:27:31,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:31,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:27:31,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:27:31,249 INFO L87 Difference]: Start difference. First operand 798 states and 1340 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2021-08-06 19:27:31,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:31,322 INFO L93 Difference]: Finished difference Result 965 states and 1590 transitions. [2021-08-06 19:27:31,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:27:31,322 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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 29 [2021-08-06 19:27:31,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:31,324 INFO L225 Difference]: With dead ends: 965 [2021-08-06 19:27:31,324 INFO L226 Difference]: Without dead ends: 955 [2021-08-06 19:27:31,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:27:31,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-08-06 19:27:31,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 816. [2021-08-06 19:27:31,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 1.687116564417178) internal successors, (1375), 815 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:31,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1375 transitions. [2021-08-06 19:27:31,332 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1375 transitions. Word has length 29 [2021-08-06 19:27:31,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:31,332 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 1375 transitions. [2021-08-06 19:27:31,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2021-08-06 19:27:31,332 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1375 transitions. [2021-08-06 19:27:31,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:27:31,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:31,333 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:31,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:31,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:31,545 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:31,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:31,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1477957793, now seen corresponding path program 9 times [2021-08-06 19:27:31,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:31,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546894421] [2021-08-06 19:27:31,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:31,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:31,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:31,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546894421] [2021-08-06 19:27:31,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546894421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:31,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708651267] [2021-08-06 19:27:31,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:27:31,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:31,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:31,600 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:31,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 19:27:32,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:27:32,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:32,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:27:32,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:32,301 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:27:32,302 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:27:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:32,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708651267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:32,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:32,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-08-06 19:27:32,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816749458] [2021-08-06 19:27:32,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:27:32,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:32,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:27:32,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:27:32,319 INFO L87 Difference]: Start difference. First operand 816 states and 1375 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:32,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:32,408 INFO L93 Difference]: Finished difference Result 1134 states and 1857 transitions. [2021-08-06 19:27:32,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:27:32,408 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 19:27:32,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:32,410 INFO L225 Difference]: With dead ends: 1134 [2021-08-06 19:27:32,410 INFO L226 Difference]: Without dead ends: 1129 [2021-08-06 19:27:32,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:27:32,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-08-06 19:27:32,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 793. [2021-08-06 19:27:32,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 1.6856060606060606) internal successors, (1335), 792 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:32,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1335 transitions. [2021-08-06 19:27:32,418 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1335 transitions. Word has length 29 [2021-08-06 19:27:32,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:32,418 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 1335 transitions. [2021-08-06 19:27:32,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:32,418 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1335 transitions. [2021-08-06 19:27:32,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:27:32,419 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:32,419 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:32,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-06 19:27:32,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:32,620 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:32,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:32,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1416756918, now seen corresponding path program 10 times [2021-08-06 19:27:32,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:32,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646580298] [2021-08-06 19:27:32,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:32,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:32,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:32,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646580298] [2021-08-06 19:27:32,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646580298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:32,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154549388] [2021-08-06 19:27:32,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:27:32,694 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:32,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:32,694 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:32,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 19:27:33,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:27:33,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:33,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:27:33,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:33,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154549388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:33,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:33,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-06 19:27:33,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267109175] [2021-08-06 19:27:33,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:27:33,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:33,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:27:33,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:27:33,376 INFO L87 Difference]: Start difference. First operand 793 states and 1335 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:33,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:33,640 INFO L93 Difference]: Finished difference Result 1111 states and 1782 transitions. [2021-08-06 19:27:33,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:27:33,640 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 19:27:33,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:33,642 INFO L225 Difference]: With dead ends: 1111 [2021-08-06 19:27:33,642 INFO L226 Difference]: Without dead ends: 1090 [2021-08-06 19:27:33,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:27:33,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-08-06 19:27:33,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 824. [2021-08-06 19:27:33,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 1.6743620899149454) internal successors, (1378), 823 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:33,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1378 transitions. [2021-08-06 19:27:33,652 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1378 transitions. Word has length 29 [2021-08-06 19:27:33,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:33,652 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 1378 transitions. [2021-08-06 19:27:33,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:33,652 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1378 transitions. [2021-08-06 19:27:33,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:27:33,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:33,653 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:33,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:33,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:33,870 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:33,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:33,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1579180662, now seen corresponding path program 18 times [2021-08-06 19:27:33,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:33,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924737297] [2021-08-06 19:27:33,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:33,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:33,931 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 74.1 percent of original size [2021-08-06 19:27:33,933 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 74.1 percent of original size [2021-08-06 19:27:33,953 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:27:33,954 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:27:33,959 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:33,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:33,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924737297] [2021-08-06 19:27:33,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924737297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:33,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425324833] [2021-08-06 19:27:33,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:27:33,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:33,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:33,960 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:33,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 19:27:34,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:27:34,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:34,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:27:34,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:34,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425324833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:34,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:34,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:27:34,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101580165] [2021-08-06 19:27:34,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:27:34,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:34,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:27:34,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:27:34,658 INFO L87 Difference]: Start difference. First operand 824 states and 1378 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:34,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:34,863 INFO L93 Difference]: Finished difference Result 883 states and 1443 transitions. [2021-08-06 19:27:34,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:27:34,863 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 19:27:34,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:34,864 INFO L225 Difference]: With dead ends: 883 [2021-08-06 19:27:34,864 INFO L226 Difference]: Without dead ends: 841 [2021-08-06 19:27:34,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:27:34,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-08-06 19:27:34,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 779. [2021-08-06 19:27:34,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 1.679948586118252) internal successors, (1307), 778 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:34,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1307 transitions. [2021-08-06 19:27:34,871 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1307 transitions. Word has length 29 [2021-08-06 19:27:34,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:34,871 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 1307 transitions. [2021-08-06 19:27:34,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:34,871 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1307 transitions. [2021-08-06 19:27:34,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:27:34,872 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:34,872 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:34,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:35,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-06 19:27:35,073 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:35,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:35,073 INFO L82 PathProgramCache]: Analyzing trace with hash -847164636, now seen corresponding path program 19 times [2021-08-06 19:27:35,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:35,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456474299] [2021-08-06 19:27:35,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:35,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:35,116 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:27:35,117 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:27:35,127 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 73.7 percent of original size [2021-08-06 19:27:35,129 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 73.7 percent of original size [2021-08-06 19:27:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:35,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:35,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456474299] [2021-08-06 19:27:35,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456474299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:35,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719096533] [2021-08-06 19:27:35,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:27:35,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:35,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:35,155 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:35,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 19:27:35,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:35,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:27:35,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:35,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719096533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:35,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:35,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2021-08-06 19:27:35,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840143872] [2021-08-06 19:27:35,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:27:35,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:35,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:27:35,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:27:35,890 INFO L87 Difference]: Start difference. First operand 779 states and 1307 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:36,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:36,022 INFO L93 Difference]: Finished difference Result 918 states and 1506 transitions. [2021-08-06 19:27:36,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:27:36,022 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 19:27:36,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:36,023 INFO L225 Difference]: With dead ends: 918 [2021-08-06 19:27:36,023 INFO L226 Difference]: Without dead ends: 918 [2021-08-06 19:27:36,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:27:36,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-08-06 19:27:36,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 796. [2021-08-06 19:27:36,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 1.6855345911949686) internal successors, (1340), 795 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:36,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1340 transitions. [2021-08-06 19:27:36,038 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1340 transitions. Word has length 29 [2021-08-06 19:27:36,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:36,038 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 1340 transitions. [2021-08-06 19:27:36,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:36,038 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1340 transitions. [2021-08-06 19:27:36,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:27:36,039 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:36,039 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:36,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-06 19:27:36,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-06 19:27:36,239 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:36,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:36,240 INFO L82 PathProgramCache]: Analyzing trace with hash -10533123, now seen corresponding path program 11 times [2021-08-06 19:27:36,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:36,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283054614] [2021-08-06 19:27:36,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:36,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:36,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:36,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283054614] [2021-08-06 19:27:36,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283054614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:36,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288102354] [2021-08-06 19:27:36,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:27:36,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:36,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:36,313 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:36,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 19:27:36,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:27:36,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:36,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:27:36,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:37,052 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:27:37,053 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:27:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:37,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288102354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:37,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:37,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2021-08-06 19:27:37,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135828056] [2021-08-06 19:27:37,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:27:37,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:37,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:27:37,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:27:37,069 INFO L87 Difference]: Start difference. First operand 796 states and 1340 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:37,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:37,184 INFO L93 Difference]: Finished difference Result 1254 states and 2046 transitions. [2021-08-06 19:27:37,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:27:37,184 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 19:27:37,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:37,185 INFO L225 Difference]: With dead ends: 1254 [2021-08-06 19:27:37,185 INFO L226 Difference]: Without dead ends: 1254 [2021-08-06 19:27:37,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:27:37,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-08-06 19:27:37,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 850. [2021-08-06 19:27:37,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 1.6890459363957597) internal successors, (1434), 849 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:37,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1434 transitions. [2021-08-06 19:27:37,195 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1434 transitions. Word has length 29 [2021-08-06 19:27:37,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:37,195 INFO L470 AbstractCegarLoop]: Abstraction has 850 states and 1434 transitions. [2021-08-06 19:27:37,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:37,195 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1434 transitions. [2021-08-06 19:27:37,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:27:37,196 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:37,196 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:37,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:37,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-06 19:27:37,413 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:37,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:37,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1215511715, now seen corresponding path program 20 times [2021-08-06 19:27:37,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:37,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314637514] [2021-08-06 19:27:37,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:37,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:37,475 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:37,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:37,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314637514] [2021-08-06 19:27:37,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314637514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:37,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721920775] [2021-08-06 19:27:37,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:27:37,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:37,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:37,476 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:37,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 19:27:38,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:27:38,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:38,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:27:38,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:38,192 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:27:38,193 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:27:38,262 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:27:38,263 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:27:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:38,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721920775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:38,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:38,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 19:27:38,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454233608] [2021-08-06 19:27:38,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:27:38,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:38,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:27:38,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:27:38,289 INFO L87 Difference]: Start difference. First operand 850 states and 1434 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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) [2021-08-06 19:27:38,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:38,350 INFO L93 Difference]: Finished difference Result 913 states and 1518 transitions. [2021-08-06 19:27:38,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:27:38,350 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 29 [2021-08-06 19:27:38,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:38,351 INFO L225 Difference]: With dead ends: 913 [2021-08-06 19:27:38,351 INFO L226 Difference]: Without dead ends: 909 [2021-08-06 19:27:38,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:27:38,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2021-08-06 19:27:38,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 824. [2021-08-06 19:27:38,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 1.6877278250303767) internal successors, (1389), 823 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:38,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1389 transitions. [2021-08-06 19:27:38,360 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1389 transitions. Word has length 29 [2021-08-06 19:27:38,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:38,360 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 1389 transitions. [2021-08-06 19:27:38,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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) [2021-08-06 19:27:38,360 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1389 transitions. [2021-08-06 19:27:38,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:27:38,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:38,361 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:38,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:38,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-06 19:27:38,579 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:38,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:38,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1462730762, now seen corresponding path program 21 times [2021-08-06 19:27:38,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:38,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977218779] [2021-08-06 19:27:38,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:38,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:38,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:38,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977218779] [2021-08-06 19:27:38,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977218779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:38,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460917682] [2021-08-06 19:27:38,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:27:38,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:38,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:38,636 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:38,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 19:27:39,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:27:39,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:39,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:27:39,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:39,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460917682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:39,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:39,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 19:27:39,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028371822] [2021-08-06 19:27:39,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:27:39,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:39,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:27:39,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:27:39,422 INFO L87 Difference]: Start difference. First operand 824 states and 1389 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-08-06 19:27:39,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:39,522 INFO L93 Difference]: Finished difference Result 1058 states and 1731 transitions. [2021-08-06 19:27:39,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:27:39,523 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 29 [2021-08-06 19:27:39,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:39,524 INFO L225 Difference]: With dead ends: 1058 [2021-08-06 19:27:39,524 INFO L226 Difference]: Without dead ends: 1048 [2021-08-06 19:27:39,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:27:39,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-08-06 19:27:39,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 864. [2021-08-06 19:27:39,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 1.6767091541135573) internal successors, (1447), 863 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:39,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1447 transitions. [2021-08-06 19:27:39,532 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1447 transitions. Word has length 29 [2021-08-06 19:27:39,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:39,532 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 1447 transitions. [2021-08-06 19:27:39,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-08-06 19:27:39,532 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1447 transitions. [2021-08-06 19:27:39,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:27:39,533 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:39,533 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:39,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:39,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:39,745 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:39,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:39,745 INFO L82 PathProgramCache]: Analyzing trace with hash -626099249, now seen corresponding path program 12 times [2021-08-06 19:27:39,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:39,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344646888] [2021-08-06 19:27:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:39,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:39,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:39,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344646888] [2021-08-06 19:27:39,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344646888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:39,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42076738] [2021-08-06 19:27:39,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:27:39,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:39,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:39,809 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:39,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 19:27:40,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:27:40,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:40,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:27:40,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:40,623 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:27:40,624 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:27:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:40,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42076738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:40,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:40,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 19:27:40,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455947913] [2021-08-06 19:27:40,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:27:40,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:40,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:27:40,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:27:40,641 INFO L87 Difference]: Start difference. First operand 864 states and 1447 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-08-06 19:27:40,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:40,756 INFO L93 Difference]: Finished difference Result 1353 states and 2197 transitions. [2021-08-06 19:27:40,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:27:40,757 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 29 [2021-08-06 19:27:40,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:40,758 INFO L225 Difference]: With dead ends: 1353 [2021-08-06 19:27:40,758 INFO L226 Difference]: Without dead ends: 1353 [2021-08-06 19:27:40,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:27:40,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-08-06 19:27:40,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 940. [2021-08-06 19:27:40,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 1.6964856230031948) internal successors, (1593), 939 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:40,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1593 transitions. [2021-08-06 19:27:40,768 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1593 transitions. Word has length 29 [2021-08-06 19:27:40,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:40,769 INFO L470 AbstractCegarLoop]: Abstraction has 940 states and 1593 transitions. [2021-08-06 19:27:40,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-08-06 19:27:40,769 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1593 transitions. [2021-08-06 19:27:40,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:27:40,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:40,770 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:40,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:40,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-06 19:27:40,977 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:40,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:40,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1271178141, now seen corresponding path program 13 times [2021-08-06 19:27:40,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:40,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382955289] [2021-08-06 19:27:40,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:40,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:41,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:41,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382955289] [2021-08-06 19:27:41,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382955289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:41,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839486893] [2021-08-06 19:27:41,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:27:41,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:41,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:41,047 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:41,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 19:27:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:41,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:27:41,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:41,886 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:27:41,886 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:27:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:41,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839486893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:41,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:41,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 19:27:41,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877330150] [2021-08-06 19:27:41,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:27:41,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:41,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:27:41,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:27:41,904 INFO L87 Difference]: Start difference. First operand 940 states and 1593 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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) [2021-08-06 19:27:42,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:42,035 INFO L93 Difference]: Finished difference Result 1246 states and 2035 transitions. [2021-08-06 19:27:42,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:27:42,035 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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 29 [2021-08-06 19:27:42,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:42,037 INFO L225 Difference]: With dead ends: 1246 [2021-08-06 19:27:42,037 INFO L226 Difference]: Without dead ends: 1246 [2021-08-06 19:27:42,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:27:42,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-08-06 19:27:42,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 906. [2021-08-06 19:27:42,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 1.6906077348066297) internal successors, (1530), 905 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:42,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1530 transitions. [2021-08-06 19:27:42,047 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1530 transitions. Word has length 29 [2021-08-06 19:27:42,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:42,047 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 1530 transitions. [2021-08-06 19:27:42,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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) [2021-08-06 19:27:42,047 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1530 transitions. [2021-08-06 19:27:42,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 19:27:42,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:42,048 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:42,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:42,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-06 19:27:42,265 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:42,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:42,265 INFO L82 PathProgramCache]: Analyzing trace with hash 486551507, now seen corresponding path program 14 times [2021-08-06 19:27:42,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:42,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938216268] [2021-08-06 19:27:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:42,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:42,308 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:27:42,309 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:27:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:42,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:42,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938216268] [2021-08-06 19:27:42,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938216268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:42,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121548775] [2021-08-06 19:27:42,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:27:42,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:42,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:42,317 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:42,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 19:27:42,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:27:42,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:42,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:27:42,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:43,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121548775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:43,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:43,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-06 19:27:43,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82626628] [2021-08-06 19:27:43,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:27:43,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:43,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:27:43,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:27:43,177 INFO L87 Difference]: Start difference. First operand 906 states and 1530 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 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) [2021-08-06 19:27:43,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:43,264 INFO L93 Difference]: Finished difference Result 1376 states and 2251 transitions. [2021-08-06 19:27:43,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:27:43,264 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 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 32 [2021-08-06 19:27:43,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:43,266 INFO L225 Difference]: With dead ends: 1376 [2021-08-06 19:27:43,266 INFO L226 Difference]: Without dead ends: 1357 [2021-08-06 19:27:43,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:27:43,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2021-08-06 19:27:43,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1177. [2021-08-06 19:27:43,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 1.6879251700680271) internal successors, (1985), 1176 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:43,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1985 transitions. [2021-08-06 19:27:43,278 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1985 transitions. Word has length 32 [2021-08-06 19:27:43,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:43,278 INFO L470 AbstractCegarLoop]: Abstraction has 1177 states and 1985 transitions. [2021-08-06 19:27:43,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 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) [2021-08-06 19:27:43,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1985 transitions. [2021-08-06 19:27:43,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 19:27:43,280 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:43,280 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:43,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-06 19:27:43,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-08-06 19:27:43,489 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:43,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:43,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1444205388, now seen corresponding path program 22 times [2021-08-06 19:27:43,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:43,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114617330] [2021-08-06 19:27:43,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:43,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:43,541 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:27:43,541 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:27:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:27:43,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:43,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114617330] [2021-08-06 19:27:43,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114617330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:43,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291185922] [2021-08-06 19:27:43,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:27:43,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:43,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:43,552 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:43,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 19:27:44,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:27:44,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:44,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:27:44,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:44,471 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:27:44,471 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:27:44,494 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:44,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291185922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:44,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:44,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 11 [2021-08-06 19:27:44,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636108761] [2021-08-06 19:27:44,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:27:44,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:44,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:27:44,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:27:44,495 INFO L87 Difference]: Start difference. First operand 1177 states and 1985 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:44,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:44,879 INFO L93 Difference]: Finished difference Result 1745 states and 2782 transitions. [2021-08-06 19:27:44,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:27:44,879 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 19:27:44,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:44,881 INFO L225 Difference]: With dead ends: 1745 [2021-08-06 19:27:44,881 INFO L226 Difference]: Without dead ends: 1712 [2021-08-06 19:27:44,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 186.4ms TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:27:44,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-08-06 19:27:44,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1172. [2021-08-06 19:27:44,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 1171 states have (on average 1.6840307429547396) internal successors, (1972), 1171 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:44,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1972 transitions. [2021-08-06 19:27:44,894 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1972 transitions. Word has length 32 [2021-08-06 19:27:44,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:44,894 INFO L470 AbstractCegarLoop]: Abstraction has 1172 states and 1972 transitions. [2021-08-06 19:27:44,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:44,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1972 transitions. [2021-08-06 19:27:44,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 19:27:44,896 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:44,896 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:44,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-06 19:27:45,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:45,115 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:45,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:45,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1356439768, now seen corresponding path program 23 times [2021-08-06 19:27:45,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:45,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914210037] [2021-08-06 19:27:45,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:45,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:45,160 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:27:45,161 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:27:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:27:45,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:45,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914210037] [2021-08-06 19:27:45,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914210037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:45,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766181578] [2021-08-06 19:27:45,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:27:45,166 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:45,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:45,169 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:45,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 19:27:45,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 19:27:45,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:45,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:27:45,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:46,201 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:27:46,202 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:27:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:46,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766181578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:46,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:46,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 13 [2021-08-06 19:27:46,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711553553] [2021-08-06 19:27:46,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:27:46,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:46,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:27:46,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:27:46,229 INFO L87 Difference]: Start difference. First operand 1172 states and 1972 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:46,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:46,732 INFO L93 Difference]: Finished difference Result 1957 states and 3181 transitions. [2021-08-06 19:27:46,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:27:46,733 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 19:27:46,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:46,735 INFO L225 Difference]: With dead ends: 1957 [2021-08-06 19:27:46,735 INFO L226 Difference]: Without dead ends: 1938 [2021-08-06 19:27:46,736 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 244.5ms TimeCoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:27:46,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2021-08-06 19:27:46,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1325. [2021-08-06 19:27:46,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1324 states have (on average 1.7031722054380665) internal successors, (2255), 1324 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:46,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 2255 transitions. [2021-08-06 19:27:46,753 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 2255 transitions. Word has length 32 [2021-08-06 19:27:46,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:46,753 INFO L470 AbstractCegarLoop]: Abstraction has 1325 states and 2255 transitions. [2021-08-06 19:27:46,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:46,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 2255 transitions. [2021-08-06 19:27:46,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 19:27:46,758 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:46,758 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:46,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:46,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:46,973 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:46,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:46,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1341590068, now seen corresponding path program 24 times [2021-08-06 19:27:46,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:46,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810120001] [2021-08-06 19:27:46,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:46,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:47,028 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:27:47,031 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:27:47,037 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:47,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:47,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810120001] [2021-08-06 19:27:47,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810120001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:47,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400016607] [2021-08-06 19:27:47,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:27:47,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:47,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:47,038 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:47,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 19:27:47,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:27:47,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:47,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:27:47,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:48,056 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:27:48,057 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:27:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:48,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400016607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:48,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:48,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 13 [2021-08-06 19:27:48,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170127072] [2021-08-06 19:27:48,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:27:48,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:48,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:27:48,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:27:48,080 INFO L87 Difference]: Start difference. First operand 1325 states and 2255 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:48,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:48,591 INFO L93 Difference]: Finished difference Result 2027 states and 3308 transitions. [2021-08-06 19:27:48,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:27:48,591 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 19:27:48,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:48,594 INFO L225 Difference]: With dead ends: 2027 [2021-08-06 19:27:48,594 INFO L226 Difference]: Without dead ends: 1998 [2021-08-06 19:27:48,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 277.6ms TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:27:48,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-08-06 19:27:48,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1498. [2021-08-06 19:27:48,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 1.696058784235137) internal successors, (2539), 1497 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:48,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 2539 transitions. [2021-08-06 19:27:48,611 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 2539 transitions. Word has length 32 [2021-08-06 19:27:48,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:48,611 INFO L470 AbstractCegarLoop]: Abstraction has 1498 states and 2539 transitions. [2021-08-06 19:27:48,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:48,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 2539 transitions. [2021-08-06 19:27:48,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:27:48,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:48,613 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:48,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-06 19:27:48,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:48,814 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:48,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:48,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1870048664, now seen corresponding path program 15 times [2021-08-06 19:27:48,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:48,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754333949] [2021-08-06 19:27:48,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:48,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:48,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:48,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754333949] [2021-08-06 19:27:48,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754333949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:48,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483501104] [2021-08-06 19:27:48,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:27:48,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:48,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:48,917 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:48,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 19:27:49,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:27:49,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:49,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:27:49,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:49,987 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 95.5 percent of original size [2021-08-06 19:27:49,989 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 95.5 percent of original size [2021-08-06 19:27:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:50,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483501104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:50,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:50,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-08-06 19:27:50,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790892851] [2021-08-06 19:27:50,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:27:50,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:50,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:27:50,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:27:50,035 INFO L87 Difference]: Start difference. First operand 1498 states and 2539 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:50,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:50,530 INFO L93 Difference]: Finished difference Result 2415 states and 3943 transitions. [2021-08-06 19:27:50,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:27:50,531 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:27:50,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:50,534 INFO L225 Difference]: With dead ends: 2415 [2021-08-06 19:27:50,534 INFO L226 Difference]: Without dead ends: 2415 [2021-08-06 19:27:50,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 248.2ms TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:27:50,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-08-06 19:27:50,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1489. [2021-08-06 19:27:50,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1488 states have (on average 1.6861559139784945) internal successors, (2509), 1488 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 2509 transitions. [2021-08-06 19:27:50,552 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 2509 transitions. Word has length 35 [2021-08-06 19:27:50,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:50,552 INFO L470 AbstractCegarLoop]: Abstraction has 1489 states and 2509 transitions. [2021-08-06 19:27:50,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:50,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 2509 transitions. [2021-08-06 19:27:50,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:27:50,554 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:50,554 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:50,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-06 19:27:50,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-06 19:27:50,755 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:50,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:50,755 INFO L82 PathProgramCache]: Analyzing trace with hash 535598141, now seen corresponding path program 25 times [2021-08-06 19:27:50,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:50,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515897713] [2021-08-06 19:27:50,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:50,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:50,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:50,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515897713] [2021-08-06 19:27:50,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515897713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:50,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411010969] [2021-08-06 19:27:50,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:27:50,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:50,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:50,854 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:50,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 19:27:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:51,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 19:27:51,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:51,891 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 20 treesize of output 14 [2021-08-06 19:27:51,893 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 10 treesize of output 1 [2021-08-06 19:27:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:51,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411010969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:51,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:51,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 19:27:51,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105742754] [2021-08-06 19:27:51,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 19:27:51,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:51,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 19:27:51,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:27:51,923 INFO L87 Difference]: Start difference. First operand 1489 states and 2509 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:52,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:52,919 INFO L93 Difference]: Finished difference Result 3227 states and 5085 transitions. [2021-08-06 19:27:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 19:27:52,919 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:27:52,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:52,923 INFO L225 Difference]: With dead ends: 3227 [2021-08-06 19:27:52,923 INFO L226 Difference]: Without dead ends: 3167 [2021-08-06 19:27:52,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 659.9ms TimeCoverageRelationStatistics Valid=387, Invalid=2693, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 19:27:52,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3167 states. [2021-08-06 19:27:52,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3167 to 1910. [2021-08-06 19:27:52,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1909 states have (on average 1.7176532215819802) internal successors, (3279), 1909 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:52,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 3279 transitions. [2021-08-06 19:27:52,948 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 3279 transitions. Word has length 35 [2021-08-06 19:27:52,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:52,948 INFO L470 AbstractCegarLoop]: Abstraction has 1910 states and 3279 transitions. [2021-08-06 19:27:52,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:52,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 3279 transitions. [2021-08-06 19:27:52,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:27:52,950 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:52,950 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:52,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-06 19:27:53,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-06 19:27:53,161 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:53,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:53,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1746274301, now seen corresponding path program 16 times [2021-08-06 19:27:53,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:53,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619935610] [2021-08-06 19:27:53,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:53,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:53,255 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:27:53,258 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:27:53,277 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:27:53,279 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:27:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:53,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:53,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619935610] [2021-08-06 19:27:53,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619935610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:53,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057188751] [2021-08-06 19:27:53,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:27:53,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:53,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:53,289 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:53,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 19:27:54,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:27:54,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:54,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:27:54,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:54,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057188751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:54,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:54,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-06 19:27:54,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394265906] [2021-08-06 19:27:54,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:27:54,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:54,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:27:54,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:27:54,299 INFO L87 Difference]: Start difference. First operand 1910 states and 3279 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:54,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:54,661 INFO L93 Difference]: Finished difference Result 2075 states and 3477 transitions. [2021-08-06 19:27:54,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:27:54,665 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:27:54,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:54,667 INFO L225 Difference]: With dead ends: 2075 [2021-08-06 19:27:54,667 INFO L226 Difference]: Without dead ends: 1996 [2021-08-06 19:27:54,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:27:54,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2021-08-06 19:27:54,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1912. [2021-08-06 19:27:54,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 1.7137624280481423) internal successors, (3275), 1911 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:54,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 3275 transitions. [2021-08-06 19:27:54,683 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 3275 transitions. Word has length 35 [2021-08-06 19:27:54,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:54,683 INFO L470 AbstractCegarLoop]: Abstraction has 1912 states and 3275 transitions. [2021-08-06 19:27:54,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:54,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 3275 transitions. [2021-08-06 19:27:54,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:27:54,685 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:54,686 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:54,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-06 19:27:54,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-06 19:27:54,886 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:54,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:54,886 INFO L82 PathProgramCache]: Analyzing trace with hash 706293320, now seen corresponding path program 26 times [2021-08-06 19:27:54,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:54,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091560258] [2021-08-06 19:27:54,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:54,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:54,979 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:54,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:54,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091560258] [2021-08-06 19:27:54,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091560258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:54,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588689915] [2021-08-06 19:27:54,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:27:54,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:54,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:54,981 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:54,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 19:27:55,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:27:55,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:55,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:27:55,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:56,025 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:27:56,026 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:27:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:56,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588689915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:56,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:56,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:27:56,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868907246] [2021-08-06 19:27:56,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:27:56,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:56,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:27:56,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:27:56,057 INFO L87 Difference]: Start difference. First operand 1912 states and 3275 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:56,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:56,157 INFO L93 Difference]: Finished difference Result 2456 states and 4090 transitions. [2021-08-06 19:27:56,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:27:56,157 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:27:56,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:56,160 INFO L225 Difference]: With dead ends: 2456 [2021-08-06 19:27:56,160 INFO L226 Difference]: Without dead ends: 2456 [2021-08-06 19:27:56,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:27:56,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-08-06 19:27:56,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2042. [2021-08-06 19:27:56,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2042 states, 2041 states have (on average 1.7256246937775601) internal successors, (3522), 2041 states have internal predecessors, (3522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:56,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2042 states to 2042 states and 3522 transitions. [2021-08-06 19:27:56,189 INFO L78 Accepts]: Start accepts. Automaton has 2042 states and 3522 transitions. Word has length 35 [2021-08-06 19:27:56,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:56,190 INFO L470 AbstractCegarLoop]: Abstraction has 2042 states and 3522 transitions. [2021-08-06 19:27:56,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:56,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2042 states and 3522 transitions. [2021-08-06 19:27:56,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:27:56,192 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:56,192 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:56,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:56,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-06 19:27:56,401 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:56,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:56,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1542924833, now seen corresponding path program 17 times [2021-08-06 19:27:56,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:56,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789710458] [2021-08-06 19:27:56,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:56,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:56,470 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:27:56,471 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:27:56,483 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:27:56,485 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:27:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:56,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:56,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789710458] [2021-08-06 19:27:56,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789710458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:56,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954556338] [2021-08-06 19:27:56,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:27:56,514 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:56,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:56,515 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:56,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 19:27:57,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:27:57,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:57,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:27:57,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:57,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954556338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:57,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:57,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 11 [2021-08-06 19:27:57,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599283369] [2021-08-06 19:27:57,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:27:57,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:57,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:27:57,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:27:57,563 INFO L87 Difference]: Start difference. First operand 2042 states and 3522 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:57,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:57,816 INFO L93 Difference]: Finished difference Result 2223 states and 3755 transitions. [2021-08-06 19:27:57,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:27:57,817 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:27:57,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:57,819 INFO L225 Difference]: With dead ends: 2223 [2021-08-06 19:27:57,819 INFO L226 Difference]: Without dead ends: 2223 [2021-08-06 19:27:57,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 144.1ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:27:57,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2021-08-06 19:27:57,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 2050. [2021-08-06 19:27:57,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 2049 states have (on average 1.7257198633479747) internal successors, (3536), 2049 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:57,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 3536 transitions. [2021-08-06 19:27:57,837 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 3536 transitions. Word has length 35 [2021-08-06 19:27:57,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:57,837 INFO L470 AbstractCegarLoop]: Abstraction has 2050 states and 3536 transitions. [2021-08-06 19:27:57,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:57,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 3536 transitions. [2021-08-06 19:27:57,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:27:57,839 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:57,839 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:57,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-06 19:27:58,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-06 19:27:58,040 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:58,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:58,040 INFO L82 PathProgramCache]: Analyzing trace with hash -60004830, now seen corresponding path program 27 times [2021-08-06 19:27:58,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:58,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696202434] [2021-08-06 19:27:58,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:58,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:58,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:58,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696202434] [2021-08-06 19:27:58,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696202434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:58,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20494684] [2021-08-06 19:27:58,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:27:58,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:58,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:58,111 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:58,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 19:27:58,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:27:58,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:58,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:27:58,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:59,126 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:27:59,127 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:27:59,152 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:27:59,152 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:27:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:59,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20494684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:59,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:59,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:27:59,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882811127] [2021-08-06 19:27:59,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:27:59,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:59,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:27:59,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:27:59,180 INFO L87 Difference]: Start difference. First operand 2050 states and 3536 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:59,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:59,266 INFO L93 Difference]: Finished difference Result 2463 states and 4097 transitions. [2021-08-06 19:27:59,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:27:59,266 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:27:59,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:59,269 INFO L225 Difference]: With dead ends: 2463 [2021-08-06 19:27:59,269 INFO L226 Difference]: Without dead ends: 2461 [2021-08-06 19:27:59,269 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:27:59,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2021-08-06 19:27:59,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 2046. [2021-08-06 19:27:59,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2046 states, 2045 states have (on average 1.7251833740831295) internal successors, (3528), 2045 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2046 states to 2046 states and 3528 transitions. [2021-08-06 19:27:59,288 INFO L78 Accepts]: Start accepts. Automaton has 2046 states and 3528 transitions. Word has length 35 [2021-08-06 19:27:59,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:59,288 INFO L470 AbstractCegarLoop]: Abstraction has 2046 states and 3528 transitions. [2021-08-06 19:27:59,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:59,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2046 states and 3528 transitions. [2021-08-06 19:27:59,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:27:59,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:59,290 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:59,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:59,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-06 19:27:59,491 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:59,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:59,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1937109928, now seen corresponding path program 18 times [2021-08-06 19:27:59,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:59,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320583018] [2021-08-06 19:27:59,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:59,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:59,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:59,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320583018] [2021-08-06 19:27:59,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320583018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:59,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958729716] [2021-08-06 19:27:59,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:27:59,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:59,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:59,566 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:59,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 19:28:00,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:28:00,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:00,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:28:00,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:00,663 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:28:00,664 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:28:00,681 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:00,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958729716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:00,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:00,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-08-06 19:28:00,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139117635] [2021-08-06 19:28:00,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:28:00,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:00,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:28:00,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:28:00,682 INFO L87 Difference]: Start difference. First operand 2046 states and 3528 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:00,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:00,890 INFO L93 Difference]: Finished difference Result 3475 states and 5705 transitions. [2021-08-06 19:28:00,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:28:00,891 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:28:00,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:00,895 INFO L225 Difference]: With dead ends: 3475 [2021-08-06 19:28:00,895 INFO L226 Difference]: Without dead ends: 3470 [2021-08-06 19:28:00,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:28:00,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3470 states. [2021-08-06 19:28:00,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3470 to 2044. [2021-08-06 19:28:00,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2044 states, 2043 states have (on average 1.723935389133627) internal successors, (3522), 2043 states have internal predecessors, (3522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:00,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 3522 transitions. [2021-08-06 19:28:00,919 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 3522 transitions. Word has length 35 [2021-08-06 19:28:00,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:00,919 INFO L470 AbstractCegarLoop]: Abstraction has 2044 states and 3522 transitions. [2021-08-06 19:28:00,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:00,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 3522 transitions. [2021-08-06 19:28:00,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:00,921 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:00,921 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:00,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-06 19:28:01,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:01,122 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:01,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:01,122 INFO L82 PathProgramCache]: Analyzing trace with hash 732131336, now seen corresponding path program 28 times [2021-08-06 19:28:01,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:01,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578706928] [2021-08-06 19:28:01,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:01,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:01,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:01,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578706928] [2021-08-06 19:28:01,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578706928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:01,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996862631] [2021-08-06 19:28:01,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:28:01,194 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:01,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:01,195 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:01,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 19:28:02,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:28:02,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:02,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:28:02,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:02,249 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:28:02,250 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:28:02,303 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:28:02,304 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:28:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:02,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996862631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:02,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:02,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:28:02,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216182422] [2021-08-06 19:28:02,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:28:02,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:02,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:28:02,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:28:02,330 INFO L87 Difference]: Start difference. First operand 2044 states and 3522 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:02,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:02,427 INFO L93 Difference]: Finished difference Result 2460 states and 4097 transitions. [2021-08-06 19:28:02,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:28:02,430 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:28:02,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:02,432 INFO L225 Difference]: With dead ends: 2460 [2021-08-06 19:28:02,432 INFO L226 Difference]: Without dead ends: 2458 [2021-08-06 19:28:02,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:28:02,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2021-08-06 19:28:02,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2044. [2021-08-06 19:28:02,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2044 states, 2043 states have (on average 1.7234459128732256) internal successors, (3521), 2043 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:02,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 3521 transitions. [2021-08-06 19:28:02,451 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 3521 transitions. Word has length 35 [2021-08-06 19:28:02,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:02,451 INFO L470 AbstractCegarLoop]: Abstraction has 2044 states and 3521 transitions. [2021-08-06 19:28:02,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:02,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 3521 transitions. [2021-08-06 19:28:02,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:02,454 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:02,454 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:02,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-06 19:28:02,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:02,654 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:02,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:02,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1584638878, now seen corresponding path program 29 times [2021-08-06 19:28:02,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:02,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515895119] [2021-08-06 19:28:02,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:02,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:02,734 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:02,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:02,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515895119] [2021-08-06 19:28:02,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515895119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:02,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276860259] [2021-08-06 19:28:02,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:28:02,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:02,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:02,735 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:02,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 19:28:03,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:28:03,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:03,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:28:03,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:03,749 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:28:03,750 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:28:03,831 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:28:03,831 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:28:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:03,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276860259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:03,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:03,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-08-06 19:28:03,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903951338] [2021-08-06 19:28:03,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:28:03,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:03,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:28:03,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:28:03,857 INFO L87 Difference]: Start difference. First operand 2044 states and 3521 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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) [2021-08-06 19:28:03,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:03,990 INFO L93 Difference]: Finished difference Result 2560 states and 4232 transitions. [2021-08-06 19:28:03,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:28:03,990 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:28:03,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:03,993 INFO L225 Difference]: With dead ends: 2560 [2021-08-06 19:28:03,993 INFO L226 Difference]: Without dead ends: 2544 [2021-08-06 19:28:03,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:28:03,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-08-06 19:28:04,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2075. [2021-08-06 19:28:04,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2075 states, 2074 states have (on average 1.7256509161041467) internal successors, (3579), 2074 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:04,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 3579 transitions. [2021-08-06 19:28:04,013 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 3579 transitions. Word has length 35 [2021-08-06 19:28:04,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:04,013 INFO L470 AbstractCegarLoop]: Abstraction has 2075 states and 3579 transitions. [2021-08-06 19:28:04,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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) [2021-08-06 19:28:04,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 3579 transitions. [2021-08-06 19:28:04,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:04,015 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:04,015 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:04,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-06 19:28:04,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:04,217 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:04,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:04,218 INFO L82 PathProgramCache]: Analyzing trace with hash -361637432, now seen corresponding path program 30 times [2021-08-06 19:28:04,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:04,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117130497] [2021-08-06 19:28:04,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:04,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:04,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:04,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117130497] [2021-08-06 19:28:04,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117130497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:04,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768943987] [2021-08-06 19:28:04,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:28:04,301 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:04,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:04,301 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:04,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 19:28:05,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:28:05,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:05,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:28:05,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:05,339 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:28:05,340 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:28:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:05,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768943987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:05,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:05,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 19:28:05,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234479077] [2021-08-06 19:28:05,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:28:05,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:05,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:28:05,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:28:05,544 INFO L87 Difference]: Start difference. First operand 2075 states and 3579 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:05,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:05,686 INFO L93 Difference]: Finished difference Result 2528 states and 4177 transitions. [2021-08-06 19:28:05,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:28:05,686 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:28:05,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:05,688 INFO L225 Difference]: With dead ends: 2528 [2021-08-06 19:28:05,689 INFO L226 Difference]: Without dead ends: 2500 [2021-08-06 19:28:05,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:28:05,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2021-08-06 19:28:05,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 1948. [2021-08-06 19:28:05,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 1.7113507960965588) internal successors, (3332), 1947 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:05,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 3332 transitions. [2021-08-06 19:28:05,707 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 3332 transitions. Word has length 35 [2021-08-06 19:28:05,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:05,707 INFO L470 AbstractCegarLoop]: Abstraction has 1948 states and 3332 transitions. [2021-08-06 19:28:05,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 3332 transitions. [2021-08-06 19:28:05,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:05,709 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:05,709 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:05,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-06 19:28:05,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-08-06 19:28:05,910 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:05,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:05,910 INFO L82 PathProgramCache]: Analyzing trace with hash -133131614, now seen corresponding path program 31 times [2021-08-06 19:28:05,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:05,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882786707] [2021-08-06 19:28:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:05,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:05,997 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:05,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:05,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882786707] [2021-08-06 19:28:05,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882786707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:05,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995258258] [2021-08-06 19:28:05,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:28:05,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:05,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:05,999 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:06,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 19:28:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:06,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:28:06,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:07,044 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:28:07,045 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:28:07,200 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:28:07,201 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:28:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:07,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995258258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:07,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:07,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 19:28:07,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548638966] [2021-08-06 19:28:07,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:28:07,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:07,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:28:07,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:28:07,227 INFO L87 Difference]: Start difference. First operand 1948 states and 3332 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:07,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:07,364 INFO L93 Difference]: Finished difference Result 2313 states and 3821 transitions. [2021-08-06 19:28:07,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:28:07,364 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:28:07,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:07,366 INFO L225 Difference]: With dead ends: 2313 [2021-08-06 19:28:07,367 INFO L226 Difference]: Without dead ends: 2273 [2021-08-06 19:28:07,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:28:07,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-08-06 19:28:07,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1964. [2021-08-06 19:28:07,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 1.706571574121243) internal successors, (3350), 1963 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:07,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 3350 transitions. [2021-08-06 19:28:07,382 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 3350 transitions. Word has length 35 [2021-08-06 19:28:07,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:07,383 INFO L470 AbstractCegarLoop]: Abstraction has 1964 states and 3350 transitions. [2021-08-06 19:28:07,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:07,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 3350 transitions. [2021-08-06 19:28:07,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:07,385 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:07,385 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:07,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-06 19:28:07,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-06 19:28:07,585 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:07,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:07,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1875909053, now seen corresponding path program 19 times [2021-08-06 19:28:07,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:07,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390047529] [2021-08-06 19:28:07,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:07,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:07,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:07,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390047529] [2021-08-06 19:28:07,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390047529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:07,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276049971] [2021-08-06 19:28:07,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:28:07,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:07,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:07,657 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:07,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 19:28:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:08,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:28:08,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:08,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276049971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:08,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:08,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:28:08,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978763387] [2021-08-06 19:28:08,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:28:08,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:08,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:28:08,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:28:08,813 INFO L87 Difference]: Start difference. First operand 1964 states and 3350 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-08-06 19:28:09,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:09,007 INFO L93 Difference]: Finished difference Result 2428 states and 4004 transitions. [2021-08-06 19:28:09,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:28:09,007 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 35 [2021-08-06 19:28:09,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:09,010 INFO L225 Difference]: With dead ends: 2428 [2021-08-06 19:28:09,010 INFO L226 Difference]: Without dead ends: 2413 [2021-08-06 19:28:09,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:28:09,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2021-08-06 19:28:09,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 2040. [2021-08-06 19:28:09,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2040 states, 2039 states have (on average 1.6993624325649828) internal successors, (3465), 2039 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:09,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2040 states to 2040 states and 3465 transitions. [2021-08-06 19:28:09,029 INFO L78 Accepts]: Start accepts. Automaton has 2040 states and 3465 transitions. Word has length 35 [2021-08-06 19:28:09,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:09,029 INFO L470 AbstractCegarLoop]: Abstraction has 2040 states and 3465 transitions. [2021-08-06 19:28:09,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-08-06 19:28:09,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2040 states and 3465 transitions. [2021-08-06 19:28:09,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:09,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:09,031 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:09,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-06 19:28:09,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:09,245 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:09,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:09,245 INFO L82 PathProgramCache]: Analyzing trace with hash 581927357, now seen corresponding path program 32 times [2021-08-06 19:28:09,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:09,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746628589] [2021-08-06 19:28:09,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:09,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:09,307 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:28:09,310 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:28:09,327 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:28:09,328 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:28:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:09,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:09,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746628589] [2021-08-06 19:28:09,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746628589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:09,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565323948] [2021-08-06 19:28:09,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:28:09,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:09,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:09,339 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:09,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 19:28:10,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:28:10,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:10,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:28:10,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:10,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565323948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:10,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:10,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 19:28:10,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030832497] [2021-08-06 19:28:10,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:28:10,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:10,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:28:10,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:28:10,578 INFO L87 Difference]: Start difference. First operand 2040 states and 3465 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:10,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:10,860 INFO L93 Difference]: Finished difference Result 2172 states and 3621 transitions. [2021-08-06 19:28:10,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:28:10,860 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:28:10,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:10,863 INFO L225 Difference]: With dead ends: 2172 [2021-08-06 19:28:10,863 INFO L226 Difference]: Without dead ends: 2118 [2021-08-06 19:28:10,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:28:10,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2021-08-06 19:28:10,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 1980. [2021-08-06 19:28:10,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 1.7023749368367862) internal successors, (3369), 1979 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:10,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 3369 transitions. [2021-08-06 19:28:10,892 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 3369 transitions. Word has length 35 [2021-08-06 19:28:10,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:10,892 INFO L470 AbstractCegarLoop]: Abstraction has 1980 states and 3369 transitions. [2021-08-06 19:28:10,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:10,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 3369 transitions. [2021-08-06 19:28:10,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:10,894 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:10,894 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:10,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-06 19:28:11,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:11,095 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:11,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:11,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1766855421, now seen corresponding path program 33 times [2021-08-06 19:28:11,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:11,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598353231] [2021-08-06 19:28:11,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:11,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:11,140 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:28:11,141 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:28:11,147 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:28:11,149 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:28:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:28:11,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:11,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598353231] [2021-08-06 19:28:11,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598353231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:11,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804951731] [2021-08-06 19:28:11,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:28:11,176 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:11,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:11,176 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:11,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 19:28:12,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 19:28:12,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:12,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:28:12,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:12,339 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:28:12,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804951731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:12,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:12,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 19:28:12,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807648860] [2021-08-06 19:28:12,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:28:12,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:12,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:28:12,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:28:12,340 INFO L87 Difference]: Start difference. First operand 1980 states and 3369 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:12,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:12,456 INFO L93 Difference]: Finished difference Result 2241 states and 3752 transitions. [2021-08-06 19:28:12,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:28:12,456 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:28:12,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:12,458 INFO L225 Difference]: With dead ends: 2241 [2021-08-06 19:28:12,458 INFO L226 Difference]: Without dead ends: 2231 [2021-08-06 19:28:12,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:28:12,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-08-06 19:28:12,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 1981. [2021-08-06 19:28:12,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 1.7025252525252526) internal successors, (3371), 1980 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:12,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 3371 transitions. [2021-08-06 19:28:12,474 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 3371 transitions. Word has length 35 [2021-08-06 19:28:12,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:12,474 INFO L470 AbstractCegarLoop]: Abstraction has 1981 states and 3371 transitions. [2021-08-06 19:28:12,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:12,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 3371 transitions. [2021-08-06 19:28:12,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:12,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:12,476 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:12,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:12,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-06 19:28:12,677 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:12,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:12,677 INFO L82 PathProgramCache]: Analyzing trace with hash 434353313, now seen corresponding path program 20 times [2021-08-06 19:28:12,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:12,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421229942] [2021-08-06 19:28:12,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:12,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:12,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:12,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421229942] [2021-08-06 19:28:12,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421229942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:12,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471344073] [2021-08-06 19:28:12,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:28:12,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:12,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:12,757 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:12,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 19:28:13,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:28:13,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:13,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:28:13,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:13,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471344073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:13,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:13,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:28:13,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075110468] [2021-08-06 19:28:13,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:28:13,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:13,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:28:13,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:28:13,944 INFO L87 Difference]: Start difference. First operand 1981 states and 3371 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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) [2021-08-06 19:28:14,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:14,168 INFO L93 Difference]: Finished difference Result 2364 states and 3908 transitions. [2021-08-06 19:28:14,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:28:14,168 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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 35 [2021-08-06 19:28:14,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:14,171 INFO L225 Difference]: With dead ends: 2364 [2021-08-06 19:28:14,171 INFO L226 Difference]: Without dead ends: 2343 [2021-08-06 19:28:14,171 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:28:14,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2021-08-06 19:28:14,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 2046. [2021-08-06 19:28:14,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2046 states, 2045 states have (on average 1.6943765281173595) internal successors, (3465), 2045 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:14,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2046 states to 2046 states and 3465 transitions. [2021-08-06 19:28:14,188 INFO L78 Accepts]: Start accepts. Automaton has 2046 states and 3465 transitions. Word has length 35 [2021-08-06 19:28:14,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:14,188 INFO L470 AbstractCegarLoop]: Abstraction has 2046 states and 3465 transitions. [2021-08-06 19:28:14,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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) [2021-08-06 19:28:14,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2046 states and 3465 transitions. [2021-08-06 19:28:14,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:14,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:14,190 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:14,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:14,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-06 19:28:14,393 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:14,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:14,393 INFO L82 PathProgramCache]: Analyzing trace with hash 596777057, now seen corresponding path program 34 times [2021-08-06 19:28:14,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:14,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587684497] [2021-08-06 19:28:14,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:14,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:14,457 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:28:14,459 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:28:14,480 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:28:14,481 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:28:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:14,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:14,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587684497] [2021-08-06 19:28:14,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587684497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:14,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942224615] [2021-08-06 19:28:14,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:28:14,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:14,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:14,487 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:14,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 19:28:15,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:28:15,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:15,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:28:15,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:15,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942224615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:15,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:15,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 19:28:15,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754153287] [2021-08-06 19:28:15,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:28:15,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:15,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:28:15,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:28:15,865 INFO L87 Difference]: Start difference. First operand 2046 states and 3465 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:16,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:16,210 INFO L93 Difference]: Finished difference Result 2140 states and 3573 transitions. [2021-08-06 19:28:16,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:28:16,210 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:28:16,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:16,213 INFO L225 Difference]: With dead ends: 2140 [2021-08-06 19:28:16,213 INFO L226 Difference]: Without dead ends: 2092 [2021-08-06 19:28:16,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:28:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-08-06 19:28:16,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1987. [2021-08-06 19:28:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1986 states have (on average 1.6953675730110775) internal successors, (3367), 1986 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) [2021-08-06 19:28:16,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 3367 transitions. [2021-08-06 19:28:16,230 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 3367 transitions. Word has length 35 [2021-08-06 19:28:16,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:16,230 INFO L470 AbstractCegarLoop]: Abstraction has 1987 states and 3367 transitions. [2021-08-06 19:28:16,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:16,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 3367 transitions. [2021-08-06 19:28:16,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:16,232 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:16,232 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:16,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-06 19:28:16,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:16,445 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:16,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:16,445 INFO L82 PathProgramCache]: Analyzing trace with hash 971523024, now seen corresponding path program 35 times [2021-08-06 19:28:16,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:16,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444611457] [2021-08-06 19:28:16,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:16,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 19:28:16,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:16,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444611457] [2021-08-06 19:28:16,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444611457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:16,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207035127] [2021-08-06 19:28:16,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:28:16,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:16,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:16,508 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:16,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 19:28:17,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:28:17,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:17,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:28:17,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:17,715 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:28:17,716 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:28:17,738 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:28:17,739 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:28:17,764 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:28:17,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207035127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:17,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:17,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-08-06 19:28:17,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610936655] [2021-08-06 19:28:17,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:28:17,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:17,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:28:17,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:28:17,765 INFO L87 Difference]: Start difference. First operand 1987 states and 3367 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:17,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:17,893 INFO L93 Difference]: Finished difference Result 2321 states and 3833 transitions. [2021-08-06 19:28:17,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:28:17,893 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:28:17,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:17,896 INFO L225 Difference]: With dead ends: 2321 [2021-08-06 19:28:17,896 INFO L226 Difference]: Without dead ends: 2319 [2021-08-06 19:28:17,896 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:28:17,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-08-06 19:28:17,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 1975. [2021-08-06 19:28:17,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1974 states have (on average 1.6945288753799392) internal successors, (3345), 1974 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:17,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 3345 transitions. [2021-08-06 19:28:17,914 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 3345 transitions. Word has length 35 [2021-08-06 19:28:17,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:17,914 INFO L470 AbstractCegarLoop]: Abstraction has 1975 states and 3345 transitions. [2021-08-06 19:28:17,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:17,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 3345 transitions. [2021-08-06 19:28:17,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:17,916 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:17,916 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:17,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-06 19:28:18,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-06 19:28:18,121 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:18,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:18,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1829568241, now seen corresponding path program 36 times [2021-08-06 19:28:18,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:18,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323803890] [2021-08-06 19:28:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:18,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:18,168 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:28:18,169 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:28:18,185 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:28:18,187 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:28:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:28:18,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:18,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323803890] [2021-08-06 19:28:18,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323803890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:18,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198656954] [2021-08-06 19:28:18,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:28:18,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:18,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:18,214 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:18,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 19:28:19,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:28:19,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:19,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:28:19,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:28:19,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198656954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:19,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:19,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 19:28:19,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91586154] [2021-08-06 19:28:19,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:28:19,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:19,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:28:19,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:28:19,460 INFO L87 Difference]: Start difference. First operand 1975 states and 3345 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:19,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:19,578 INFO L93 Difference]: Finished difference Result 2208 states and 3686 transitions. [2021-08-06 19:28:19,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:28:19,578 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:28:19,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:19,580 INFO L225 Difference]: With dead ends: 2208 [2021-08-06 19:28:19,580 INFO L226 Difference]: Without dead ends: 2198 [2021-08-06 19:28:19,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:28:19,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2198 states. [2021-08-06 19:28:19,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2198 to 1976. [2021-08-06 19:28:19,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1976 states, 1975 states have (on average 1.6946835443037975) internal successors, (3347), 1975 states have internal predecessors, (3347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:19,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1976 states to 1976 states and 3347 transitions. [2021-08-06 19:28:19,597 INFO L78 Accepts]: Start accepts. Automaton has 1976 states and 3347 transitions. Word has length 35 [2021-08-06 19:28:19,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:19,597 INFO L470 AbstractCegarLoop]: Abstraction has 1976 states and 3347 transitions. [2021-08-06 19:28:19,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:19,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1976 states and 3347 transitions. [2021-08-06 19:28:19,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:19,598 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:19,598 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:19,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-06 19:28:19,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:19,799 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:19,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:19,799 INFO L82 PathProgramCache]: Analyzing trace with hash 2097051976, now seen corresponding path program 37 times [2021-08-06 19:28:19,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:19,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771474294] [2021-08-06 19:28:19,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:19,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:19,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:19,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771474294] [2021-08-06 19:28:19,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771474294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:19,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553105394] [2021-08-06 19:28:19,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:28:19,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:19,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:19,882 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:19,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 19:28:20,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:20,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:28:20,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:21,111 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:28:21,112 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:28:21,168 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:28:21,168 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:28:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:21,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553105394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:21,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:21,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:28:21,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798283122] [2021-08-06 19:28:21,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:28:21,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:21,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:28:21,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:28:21,196 INFO L87 Difference]: Start difference. First operand 1976 states and 3347 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:21,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:21,303 INFO L93 Difference]: Finished difference Result 2190 states and 3630 transitions. [2021-08-06 19:28:21,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:28:21,303 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:28:21,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:21,305 INFO L225 Difference]: With dead ends: 2190 [2021-08-06 19:28:21,305 INFO L226 Difference]: Without dead ends: 2186 [2021-08-06 19:28:21,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:28:21,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2021-08-06 19:28:21,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 1979. [2021-08-06 19:28:21,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1979 states, 1978 states have (on average 1.6936299292214358) internal successors, (3350), 1978 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:21,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1979 states to 1979 states and 3350 transitions. [2021-08-06 19:28:21,322 INFO L78 Accepts]: Start accepts. Automaton has 1979 states and 3350 transitions. Word has length 35 [2021-08-06 19:28:21,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:21,322 INFO L470 AbstractCegarLoop]: Abstraction has 1979 states and 3350 transitions. [2021-08-06 19:28:21,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:21,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1979 states and 3350 transitions. [2021-08-06 19:28:21,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:21,323 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:21,323 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:21,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-06 19:28:21,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:21,524 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:21,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:21,524 INFO L82 PathProgramCache]: Analyzing trace with hash 425295677, now seen corresponding path program 21 times [2021-08-06 19:28:21,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:21,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835363738] [2021-08-06 19:28:21,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:21,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:21,618 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:21,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:21,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835363738] [2021-08-06 19:28:21,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835363738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:21,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276920999] [2021-08-06 19:28:21,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:28:21,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:21,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:21,620 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:21,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 19:28:22,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:28:22,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:22,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:28:22,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:22,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276920999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:22,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:22,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 19:28:22,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431237582] [2021-08-06 19:28:22,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:28:22,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:22,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:28:22,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:28:22,925 INFO L87 Difference]: Start difference. First operand 1979 states and 3350 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:23,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:23,383 INFO L93 Difference]: Finished difference Result 2493 states and 4083 transitions. [2021-08-06 19:28:23,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:28:23,383 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:28:23,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:23,386 INFO L225 Difference]: With dead ends: 2493 [2021-08-06 19:28:23,386 INFO L226 Difference]: Without dead ends: 2466 [2021-08-06 19:28:23,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 286.9ms TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 19:28:23,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2021-08-06 19:28:23,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 1986. [2021-08-06 19:28:23,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 1.690176322418136) internal successors, (3355), 1985 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:23,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 3355 transitions. [2021-08-06 19:28:23,407 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 3355 transitions. Word has length 35 [2021-08-06 19:28:23,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:23,407 INFO L470 AbstractCegarLoop]: Abstraction has 1986 states and 3355 transitions. [2021-08-06 19:28:23,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:23,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 3355 transitions. [2021-08-06 19:28:23,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:23,409 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:23,409 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:23,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:23,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-08-06 19:28:23,624 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:23,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:23,625 INFO L82 PathProgramCache]: Analyzing trace with hash 602558269, now seen corresponding path program 38 times [2021-08-06 19:28:23,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:23,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134867367] [2021-08-06 19:28:23,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:23,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:23,722 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 74.1 percent of original size [2021-08-06 19:28:23,724 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 74.1 percent of original size [2021-08-06 19:28:23,746 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:28:23,747 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:28:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:23,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:23,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134867367] [2021-08-06 19:28:23,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134867367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:23,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687802552] [2021-08-06 19:28:23,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:28:23,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:23,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:23,757 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:23,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 19:28:24,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:28:24,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:24,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:28:24,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:25,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687802552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:25,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:25,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-06 19:28:25,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493577749] [2021-08-06 19:28:25,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:28:25,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:25,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:28:25,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:28:25,081 INFO L87 Difference]: Start difference. First operand 1986 states and 3355 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:25,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:25,465 INFO L93 Difference]: Finished difference Result 2084 states and 3470 transitions. [2021-08-06 19:28:25,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:28:25,465 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:28:25,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:25,467 INFO L225 Difference]: With dead ends: 2084 [2021-08-06 19:28:25,467 INFO L226 Difference]: Without dead ends: 2033 [2021-08-06 19:28:25,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:28:25,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2021-08-06 19:28:25,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1932. [2021-08-06 19:28:25,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 1.6929052304505439) internal successors, (3269), 1931 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:25,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 3269 transitions. [2021-08-06 19:28:25,483 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 3269 transitions. Word has length 35 [2021-08-06 19:28:25,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:25,483 INFO L470 AbstractCegarLoop]: Abstraction has 1932 states and 3269 transitions. [2021-08-06 19:28:25,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:25,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 3269 transitions. [2021-08-06 19:28:25,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:25,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:25,485 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:25,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:25,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:25,704 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:25,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:25,704 INFO L82 PathProgramCache]: Analyzing trace with hash -632716867, now seen corresponding path program 39 times [2021-08-06 19:28:25,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:25,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88708922] [2021-08-06 19:28:25,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:25,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:25,781 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:28:25,783 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:28:25,794 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 73.7 percent of original size [2021-08-06 19:28:25,797 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 73.7 percent of original size [2021-08-06 19:28:25,825 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:25,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:25,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88708922] [2021-08-06 19:28:25,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88708922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:25,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395868826] [2021-08-06 19:28:25,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:28:25,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:25,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:25,826 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:25,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 19:28:26,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:28:26,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:26,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:28:26,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:27,191 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:27,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395868826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:27,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:27,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 11 [2021-08-06 19:28:27,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252420210] [2021-08-06 19:28:27,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:28:27,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:27,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:28:27,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:28:27,192 INFO L87 Difference]: Start difference. First operand 1932 states and 3269 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:27,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:27,368 INFO L93 Difference]: Finished difference Result 2148 states and 3571 transitions. [2021-08-06 19:28:27,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:28:27,369 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:28:27,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:27,371 INFO L225 Difference]: With dead ends: 2148 [2021-08-06 19:28:27,371 INFO L226 Difference]: Without dead ends: 2148 [2021-08-06 19:28:27,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:28:27,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2148 states. [2021-08-06 19:28:27,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2148 to 1948. [2021-08-06 19:28:27,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 1.6954288649203904) internal successors, (3301), 1947 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:27,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 3301 transitions. [2021-08-06 19:28:27,387 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 3301 transitions. Word has length 35 [2021-08-06 19:28:27,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:27,387 INFO L470 AbstractCegarLoop]: Abstraction has 1948 states and 3301 transitions. [2021-08-06 19:28:27,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:27,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 3301 transitions. [2021-08-06 19:28:27,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:27,389 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:27,389 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:27,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-06 19:28:27,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:27,589 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:27,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:27,590 INFO L82 PathProgramCache]: Analyzing trace with hash 203914646, now seen corresponding path program 22 times [2021-08-06 19:28:27,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:27,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799753789] [2021-08-06 19:28:27,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:27,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:27,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:27,664 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:27,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:27,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799753789] [2021-08-06 19:28:27,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799753789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:27,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491174183] [2021-08-06 19:28:27,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:28:27,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:27,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:27,665 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:27,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 19:28:28,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:28:28,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:28,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:28:28,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:29,046 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:28:29,047 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:28:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:29,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491174183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:29,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:29,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 19:28:29,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4245057] [2021-08-06 19:28:29,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:28:29,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:29,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:28:29,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:28:29,064 INFO L87 Difference]: Start difference. First operand 1948 states and 3301 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 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) [2021-08-06 19:28:29,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:29,178 INFO L93 Difference]: Finished difference Result 2813 states and 4617 transitions. [2021-08-06 19:28:29,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:28:29,179 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:28:29,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:29,181 INFO L225 Difference]: With dead ends: 2813 [2021-08-06 19:28:29,181 INFO L226 Difference]: Without dead ends: 2813 [2021-08-06 19:28:29,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:28:29,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2021-08-06 19:28:29,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 2053. [2021-08-06 19:28:29,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 1.6900584795321638) internal successors, (3468), 2052 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:29,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 3468 transitions. [2021-08-06 19:28:29,200 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 3468 transitions. Word has length 35 [2021-08-06 19:28:29,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:29,200 INFO L470 AbstractCegarLoop]: Abstraction has 2053 states and 3468 transitions. [2021-08-06 19:28:29,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 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) [2021-08-06 19:28:29,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 3468 transitions. [2021-08-06 19:28:29,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:29,201 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:29,201 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:29,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-06 19:28:29,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:29,402 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:29,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:29,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1001063946, now seen corresponding path program 40 times [2021-08-06 19:28:29,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:29,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455320529] [2021-08-06 19:28:29,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:29,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:29,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:29,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455320529] [2021-08-06 19:28:29,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455320529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:29,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122750711] [2021-08-06 19:28:29,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:28:29,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:29,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:29,479 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:29,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 19:28:30,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:28:30,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:30,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:28:30,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:30,871 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:28:30,873 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:28:30,937 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:28:30,937 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:28:30,980 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:30,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122750711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:30,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:30,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:28:30,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804565243] [2021-08-06 19:28:30,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:28:30,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:30,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:28:30,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:28:30,981 INFO L87 Difference]: Start difference. First operand 2053 states and 3468 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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) [2021-08-06 19:28:31,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:31,089 INFO L93 Difference]: Finished difference Result 2155 states and 3606 transitions. [2021-08-06 19:28:31,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:28:31,090 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:28:31,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:31,092 INFO L225 Difference]: With dead ends: 2155 [2021-08-06 19:28:31,092 INFO L226 Difference]: Without dead ends: 2151 [2021-08-06 19:28:31,092 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:28:31,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-08-06 19:28:31,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 2013. [2021-08-06 19:28:31,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 2012 states have (on average 1.6883697813121272) internal successors, (3397), 2012 states have internal predecessors, (3397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:31,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 3397 transitions. [2021-08-06 19:28:31,108 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 3397 transitions. Word has length 35 [2021-08-06 19:28:31,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:31,108 INFO L470 AbstractCegarLoop]: Abstraction has 2013 states and 3397 transitions. [2021-08-06 19:28:31,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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) [2021-08-06 19:28:31,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 3397 transitions. [2021-08-06 19:28:31,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:31,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:31,110 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:31,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:31,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-06 19:28:31,310 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:31,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:31,310 INFO L82 PathProgramCache]: Analyzing trace with hash 880570173, now seen corresponding path program 41 times [2021-08-06 19:28:31,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:31,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001804036] [2021-08-06 19:28:31,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:31,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:31,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:31,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:31,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001804036] [2021-08-06 19:28:31,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001804036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:31,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193821273] [2021-08-06 19:28:31,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:28:31,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:31,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:31,395 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:31,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 19:28:32,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 19:28:32,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:32,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:28:32,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:32,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193821273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:32,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:32,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:28:32,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957629932] [2021-08-06 19:28:32,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:28:32,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:32,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:28:32,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:28:32,790 INFO L87 Difference]: Start difference. First operand 2013 states and 3397 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-08-06 19:28:32,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:32,946 INFO L93 Difference]: Finished difference Result 2473 states and 4064 transitions. [2021-08-06 19:28:32,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:28:32,946 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 35 [2021-08-06 19:28:32,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:32,948 INFO L225 Difference]: With dead ends: 2473 [2021-08-06 19:28:32,949 INFO L226 Difference]: Without dead ends: 2463 [2021-08-06 19:28:32,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:28:32,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-08-06 19:28:32,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 2052. [2021-08-06 19:28:32,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 1.6845441248171624) internal successors, (3455), 2051 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:32,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 3455 transitions. [2021-08-06 19:28:32,967 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 3455 transitions. Word has length 35 [2021-08-06 19:28:32,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:32,967 INFO L470 AbstractCegarLoop]: Abstraction has 2052 states and 3455 transitions. [2021-08-06 19:28:32,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-08-06 19:28:32,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 3455 transitions. [2021-08-06 19:28:32,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:32,969 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:32,969 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:32,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-06 19:28:33,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:33,170 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:33,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:33,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1717201686, now seen corresponding path program 23 times [2021-08-06 19:28:33,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:33,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114095667] [2021-08-06 19:28:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:33,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:33,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:33,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114095667] [2021-08-06 19:28:33,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114095667] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:33,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105317437] [2021-08-06 19:28:33,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:28:33,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:33,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:33,255 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:33,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 19:28:34,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:28:34,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:34,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:28:34,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:34,688 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:28:34,688 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:28:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:34,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105317437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:34,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:34,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-08-06 19:28:34,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768526278] [2021-08-06 19:28:34,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:28:34,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:34,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:28:34,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:28:34,705 INFO L87 Difference]: Start difference. First operand 2052 states and 3455 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:34,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:34,838 INFO L93 Difference]: Finished difference Result 3048 states and 4968 transitions. [2021-08-06 19:28:34,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:28:34,839 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:28:34,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:34,841 INFO L225 Difference]: With dead ends: 3048 [2021-08-06 19:28:34,841 INFO L226 Difference]: Without dead ends: 3048 [2021-08-06 19:28:34,841 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:28:34,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3048 states. [2021-08-06 19:28:34,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3048 to 2140. [2021-08-06 19:28:34,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 1.6905095839177187) internal successors, (3616), 2139 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:34,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 3616 transitions. [2021-08-06 19:28:34,861 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 3616 transitions. Word has length 35 [2021-08-06 19:28:34,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:34,861 INFO L470 AbstractCegarLoop]: Abstraction has 2140 states and 3616 transitions. [2021-08-06 19:28:34,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:34,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 3616 transitions. [2021-08-06 19:28:34,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:34,863 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:34,863 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:34,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-06 19:28:35,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:35,063 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:35,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:35,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1072122794, now seen corresponding path program 24 times [2021-08-06 19:28:35,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:35,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429887283] [2021-08-06 19:28:35,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:35,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:35,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:35,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429887283] [2021-08-06 19:28:35,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429887283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:35,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780295671] [2021-08-06 19:28:35,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:28:35,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:35,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:35,153 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:35,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 19:28:36,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:28:36,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:36,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:28:36,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:36,619 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:28:36,619 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:28:36,635 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:36,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780295671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:36,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:36,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 19:28:36,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60131059] [2021-08-06 19:28:36,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:28:36,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:36,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:28:36,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:28:36,636 INFO L87 Difference]: Start difference. First operand 2140 states and 3616 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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) [2021-08-06 19:28:36,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:36,777 INFO L93 Difference]: Finished difference Result 2767 states and 4504 transitions. [2021-08-06 19:28:36,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:28:36,777 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:28:36,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:36,780 INFO L225 Difference]: With dead ends: 2767 [2021-08-06 19:28:36,780 INFO L226 Difference]: Without dead ends: 2767 [2021-08-06 19:28:36,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:28:36,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2767 states. [2021-08-06 19:28:36,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2767 to 1996. [2021-08-06 19:28:36,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1995 states have (on average 1.6791979949874687) internal successors, (3350), 1995 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:36,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 3350 transitions. [2021-08-06 19:28:36,798 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 3350 transitions. Word has length 35 [2021-08-06 19:28:36,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:36,798 INFO L470 AbstractCegarLoop]: Abstraction has 1996 states and 3350 transitions. [2021-08-06 19:28:36,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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) [2021-08-06 19:28:36,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 3350 transitions. [2021-08-06 19:28:36,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:36,800 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:36,800 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:36,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:37,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2021-08-06 19:28:37,013 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:37,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:37,013 INFO L82 PathProgramCache]: Analyzing trace with hash -2137939906, now seen corresponding path program 42 times [2021-08-06 19:28:37,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:37,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101523290] [2021-08-06 19:28:37,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:37,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:37,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:37,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101523290] [2021-08-06 19:28:37,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101523290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:37,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455137424] [2021-08-06 19:28:37,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:28:37,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:37,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:37,092 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:37,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 19:28:38,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-06 19:28:38,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:38,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:28:38,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:38,488 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:28:38,489 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:28:38,570 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:28:38,570 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:28:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:38,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455137424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:38,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:38,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:28:38,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989526863] [2021-08-06 19:28:38,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:28:38,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:38,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:28:38,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:28:38,597 INFO L87 Difference]: Start difference. First operand 1996 states and 3350 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 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) [2021-08-06 19:28:38,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:38,721 INFO L93 Difference]: Finished difference Result 2187 states and 3598 transitions. [2021-08-06 19:28:38,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:28:38,722 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:28:38,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:38,724 INFO L225 Difference]: With dead ends: 2187 [2021-08-06 19:28:38,724 INFO L226 Difference]: Without dead ends: 2175 [2021-08-06 19:28:38,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:28:38,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2021-08-06 19:28:38,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1990. [2021-08-06 19:28:38,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1990 states, 1989 states have (on average 1.6802413273001509) internal successors, (3342), 1989 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:38,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1990 states to 1990 states and 3342 transitions. [2021-08-06 19:28:38,741 INFO L78 Accepts]: Start accepts. Automaton has 1990 states and 3342 transitions. Word has length 35 [2021-08-06 19:28:38,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:38,741 INFO L470 AbstractCegarLoop]: Abstraction has 1990 states and 3342 transitions. [2021-08-06 19:28:38,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 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) [2021-08-06 19:28:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1990 states and 3342 transitions. [2021-08-06 19:28:38,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:38,743 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:38,743 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:38,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:38,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:38,943 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:38,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:38,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1097940623, now seen corresponding path program 43 times [2021-08-06 19:28:38,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:38,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386692408] [2021-08-06 19:28:38,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:38,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:39,019 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:28:39,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:39,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386692408] [2021-08-06 19:28:39,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386692408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:39,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867691567] [2021-08-06 19:28:39,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:28:39,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:39,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:39,021 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:39,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 19:28:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:40,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:28:40,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:40,519 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:28:40,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867691567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:40,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:40,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:28:40,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808691533] [2021-08-06 19:28:40,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:28:40,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:40,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:28:40,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:28:40,521 INFO L87 Difference]: Start difference. First operand 1990 states and 3342 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:40,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:40,731 INFO L93 Difference]: Finished difference Result 2745 states and 4476 transitions. [2021-08-06 19:28:40,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:28:40,731 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:28:40,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:40,734 INFO L225 Difference]: With dead ends: 2745 [2021-08-06 19:28:40,734 INFO L226 Difference]: Without dead ends: 2710 [2021-08-06 19:28:40,734 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:28:40,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2021-08-06 19:28:40,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 2013. [2021-08-06 19:28:40,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 2012 states have (on average 1.6858846918489065) internal successors, (3392), 2012 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:40,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 3392 transitions. [2021-08-06 19:28:40,753 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 3392 transitions. Word has length 35 [2021-08-06 19:28:40,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:40,753 INFO L470 AbstractCegarLoop]: Abstraction has 2013 states and 3392 transitions. [2021-08-06 19:28:40,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:40,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 3392 transitions. [2021-08-06 19:28:40,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:40,755 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:40,755 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:40,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:40,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:40,956 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:40,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:40,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1056927299, now seen corresponding path program 44 times [2021-08-06 19:28:40,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:40,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689400600] [2021-08-06 19:28:40,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:40,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:41,038 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:41,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:41,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689400600] [2021-08-06 19:28:41,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689400600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:41,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795191107] [2021-08-06 19:28:41,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:28:41,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:41,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:41,039 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:41,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 19:28:42,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:28:42,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:42,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:28:42,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:42,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795191107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:42,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:42,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:28:42,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743369478] [2021-08-06 19:28:42,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:28:42,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:42,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:28:42,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:28:42,515 INFO L87 Difference]: Start difference. First operand 2013 states and 3392 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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) [2021-08-06 19:28:42,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:42,694 INFO L93 Difference]: Finished difference Result 2863 states and 4612 transitions. [2021-08-06 19:28:42,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:28:42,694 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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 35 [2021-08-06 19:28:42,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:42,697 INFO L225 Difference]: With dead ends: 2863 [2021-08-06 19:28:42,697 INFO L226 Difference]: Without dead ends: 2818 [2021-08-06 19:28:42,697 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:28:42,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2021-08-06 19:28:42,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 2029. [2021-08-06 19:28:42,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2028 states have (on average 1.671104536489152) internal successors, (3389), 2028 states have internal predecessors, (3389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:42,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 3389 transitions. [2021-08-06 19:28:42,715 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 3389 transitions. Word has length 35 [2021-08-06 19:28:42,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:42,716 INFO L470 AbstractCegarLoop]: Abstraction has 2029 states and 3389 transitions. [2021-08-06 19:28:42,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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) [2021-08-06 19:28:42,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 3389 transitions. [2021-08-06 19:28:42,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:42,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:42,717 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:42,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-06 19:28:42,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:42,918 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:42,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:42,918 INFO L82 PathProgramCache]: Analyzing trace with hash -220295786, now seen corresponding path program 25 times [2021-08-06 19:28:42,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:42,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915285986] [2021-08-06 19:28:42,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:42,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:42,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:42,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915285986] [2021-08-06 19:28:42,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915285986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:42,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380957229] [2021-08-06 19:28:42,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:28:42,997 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:42,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:42,998 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:42,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 19:28:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:44,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:28:44,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:44,546 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:28:44,547 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:28:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:44,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380957229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:44,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:44,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 19:28:44,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521446955] [2021-08-06 19:28:44,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:28:44,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:44,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:28:44,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:28:44,564 INFO L87 Difference]: Start difference. First operand 2029 states and 3389 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 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) [2021-08-06 19:28:44,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:44,734 INFO L93 Difference]: Finished difference Result 3218 states and 5192 transitions. [2021-08-06 19:28:44,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:28:44,735 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:28:44,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:44,738 INFO L225 Difference]: With dead ends: 3218 [2021-08-06 19:28:44,738 INFO L226 Difference]: Without dead ends: 3218 [2021-08-06 19:28:44,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:28:44,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3218 states. [2021-08-06 19:28:44,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3218 to 2172. [2021-08-06 19:28:44,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2172 states, 2171 states have (on average 1.677567941040995) internal successors, (3642), 2171 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:44,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2172 states to 2172 states and 3642 transitions. [2021-08-06 19:28:44,764 INFO L78 Accepts]: Start accepts. Automaton has 2172 states and 3642 transitions. Word has length 35 [2021-08-06 19:28:44,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:44,765 INFO L470 AbstractCegarLoop]: Abstraction has 2172 states and 3642 transitions. [2021-08-06 19:28:44,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 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) [2021-08-06 19:28:44,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2172 states and 3642 transitions. [2021-08-06 19:28:44,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:44,767 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:44,767 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:44,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:44,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-08-06 19:28:44,984 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:44,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:44,984 INFO L82 PathProgramCache]: Analyzing trace with hash -865374678, now seen corresponding path program 26 times [2021-08-06 19:28:44,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:44,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68174648] [2021-08-06 19:28:44,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:44,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:45,066 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:45,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:45,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68174648] [2021-08-06 19:28:45,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68174648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:45,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085224211] [2021-08-06 19:28:45,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:28:45,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:45,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:45,068 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:45,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 19:28:46,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:28:46,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:46,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:28:46,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:46,685 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:28:46,686 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:28:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:46,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085224211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:46,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:46,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 19:28:46,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126665133] [2021-08-06 19:28:46,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:28:46,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:46,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:28:46,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:28:46,704 INFO L87 Difference]: Start difference. First operand 2172 states and 3642 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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) [2021-08-06 19:28:46,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:46,893 INFO L93 Difference]: Finished difference Result 3154 states and 5096 transitions. [2021-08-06 19:28:46,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:28:46,894 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:28:46,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:46,897 INFO L225 Difference]: With dead ends: 3154 [2021-08-06 19:28:46,897 INFO L226 Difference]: Without dead ends: 3154 [2021-08-06 19:28:46,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:28:46,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2021-08-06 19:28:46,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 2187. [2021-08-06 19:28:46,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2186 states have (on average 1.6784080512351327) internal successors, (3669), 2186 states have internal predecessors, (3669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:46,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3669 transitions. [2021-08-06 19:28:46,917 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3669 transitions. Word has length 35 [2021-08-06 19:28:46,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:46,918 INFO L470 AbstractCegarLoop]: Abstraction has 2187 states and 3669 transitions. [2021-08-06 19:28:46,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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) [2021-08-06 19:28:46,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3669 transitions. [2021-08-06 19:28:46,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:28:46,919 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:46,919 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:46,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-06 19:28:47,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-08-06 19:28:47,120 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:47,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:47,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1568003350, now seen corresponding path program 27 times [2021-08-06 19:28:47,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:47,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993231781] [2021-08-06 19:28:47,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:47,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:47,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:47,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993231781] [2021-08-06 19:28:47,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993231781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:47,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784447595] [2021-08-06 19:28:47,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:28:47,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:47,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:47,213 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:47,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 19:28:48,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 19:28:48,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:48,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:28:48,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:48,816 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:28:48,817 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:28:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:48,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784447595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:48,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:48,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 19:28:48,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566232359] [2021-08-06 19:28:48,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:28:48,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:48,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:28:48,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:28:48,834 INFO L87 Difference]: Start difference. First operand 2187 states and 3669 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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) [2021-08-06 19:28:49,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:49,044 INFO L93 Difference]: Finished difference Result 2814 states and 4556 transitions. [2021-08-06 19:28:49,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:28:49,045 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:28:49,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:49,048 INFO L225 Difference]: With dead ends: 2814 [2021-08-06 19:28:49,048 INFO L226 Difference]: Without dead ends: 2814 [2021-08-06 19:28:49,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:28:49,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2021-08-06 19:28:49,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2090. [2021-08-06 19:28:49,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 2089 states have (on average 1.6773575873623743) internal successors, (3504), 2089 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:49,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 3504 transitions. [2021-08-06 19:28:49,069 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 3504 transitions. Word has length 35 [2021-08-06 19:28:49,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:49,069 INFO L470 AbstractCegarLoop]: Abstraction has 2090 states and 3504 transitions. [2021-08-06 19:28:49,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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) [2021-08-06 19:28:49,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 3504 transitions. [2021-08-06 19:28:49,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:28:49,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:49,071 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:49,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-06 19:28:49,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-08-06 19:28:49,271 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:49,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:49,272 INFO L82 PathProgramCache]: Analyzing trace with hash -913869503, now seen corresponding path program 45 times [2021-08-06 19:28:49,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:49,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890181720] [2021-08-06 19:28:49,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:49,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:49,330 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:28:49,331 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:28:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:28:49,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:49,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890181720] [2021-08-06 19:28:49,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890181720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:49,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872260523] [2021-08-06 19:28:49,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:28:49,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:49,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:49,338 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:49,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 19:28:50,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 19:28:50,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:50,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 19:28:50,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:28:50,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872260523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:50,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:50,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-06 19:28:50,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034056974] [2021-08-06 19:28:50,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:28:50,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:50,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:28:50,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:28:50,967 INFO L87 Difference]: Start difference. First operand 2090 states and 3504 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:51,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:51,093 INFO L93 Difference]: Finished difference Result 2496 states and 4079 transitions. [2021-08-06 19:28:51,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:28:51,093 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:28:51,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:51,096 INFO L225 Difference]: With dead ends: 2496 [2021-08-06 19:28:51,096 INFO L226 Difference]: Without dead ends: 2473 [2021-08-06 19:28:51,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:28:51,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2021-08-06 19:28:51,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 2153. [2021-08-06 19:28:51,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 1.6770446096654275) internal successors, (3609), 2152 states have internal predecessors, (3609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:51,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 3609 transitions. [2021-08-06 19:28:51,115 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 3609 transitions. Word has length 38 [2021-08-06 19:28:51,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:51,115 INFO L470 AbstractCegarLoop]: Abstraction has 2153 states and 3609 transitions. [2021-08-06 19:28:51,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:51,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 3609 transitions. [2021-08-06 19:28:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:28:51,117 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:51,117 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:51,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-06 19:28:51,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-06 19:28:51,317 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:51,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:51,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1527480109, now seen corresponding path program 46 times [2021-08-06 19:28:51,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:51,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665523597] [2021-08-06 19:28:51,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:51,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:51,392 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:28:51,393 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:28:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:28:51,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:51,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665523597] [2021-08-06 19:28:51,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665523597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:51,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79688900] [2021-08-06 19:28:51,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:28:51,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:51,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:51,399 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:51,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 19:28:52,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:28:52,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:52,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:28:52,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:53,110 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:28:53,111 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:28:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 27 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:53,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79688900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:53,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:53,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 14 [2021-08-06 19:28:53,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012098546] [2021-08-06 19:28:53,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:28:53,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:53,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:28:53,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:28:53,134 INFO L87 Difference]: Start difference. First operand 2153 states and 3609 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:53,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:53,689 INFO L93 Difference]: Finished difference Result 3003 states and 4825 transitions. [2021-08-06 19:28:53,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 19:28:53,690 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:28:53,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:53,693 INFO L225 Difference]: With dead ends: 3003 [2021-08-06 19:28:53,693 INFO L226 Difference]: Without dead ends: 2974 [2021-08-06 19:28:53,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 297.0ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:28:53,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2974 states. [2021-08-06 19:28:53,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2974 to 2200. [2021-08-06 19:28:53,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 1.6775807185084128) internal successors, (3689), 2199 states have internal predecessors, (3689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:53,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 3689 transitions. [2021-08-06 19:28:53,720 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 3689 transitions. Word has length 38 [2021-08-06 19:28:53,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:53,720 INFO L470 AbstractCegarLoop]: Abstraction has 2200 states and 3689 transitions. [2021-08-06 19:28:53,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:53,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 3689 transitions. [2021-08-06 19:28:53,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:28:53,722 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:53,722 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:53,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:53,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:53,923 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:53,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:53,923 INFO L82 PathProgramCache]: Analyzing trace with hash 2074735617, now seen corresponding path program 47 times [2021-08-06 19:28:53,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:53,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480299586] [2021-08-06 19:28:53,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:53,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:53,986 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:28:53,987 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:28:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:28:53,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:53,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480299586] [2021-08-06 19:28:53,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480299586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:53,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464268980] [2021-08-06 19:28:53,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:28:53,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:53,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:53,996 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:53,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 19:28:55,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 19:28:55,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:55,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 19:28:55,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:55,673 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:28:55,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464268980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:55,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:55,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-06 19:28:55,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201396450] [2021-08-06 19:28:55,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:28:55,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:55,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:28:55,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:28:55,674 INFO L87 Difference]: Start difference. First operand 2200 states and 3689 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:55,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:55,802 INFO L93 Difference]: Finished difference Result 2545 states and 4186 transitions. [2021-08-06 19:28:55,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:28:55,803 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:28:55,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:55,806 INFO L225 Difference]: With dead ends: 2545 [2021-08-06 19:28:55,806 INFO L226 Difference]: Without dead ends: 2524 [2021-08-06 19:28:55,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:28:55,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2021-08-06 19:28:55,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 2238. [2021-08-06 19:28:55,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 2237 states have (on average 1.6759052302190434) internal successors, (3749), 2237 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) [2021-08-06 19:28:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 3749 transitions. [2021-08-06 19:28:55,824 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 3749 transitions. Word has length 38 [2021-08-06 19:28:55,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:55,824 INFO L470 AbstractCegarLoop]: Abstraction has 2238 states and 3749 transitions. [2021-08-06 19:28:55,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:55,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 3749 transitions. [2021-08-06 19:28:55,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:28:55,826 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:55,826 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:55,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:56,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:56,027 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:56,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:56,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1630571027, now seen corresponding path program 48 times [2021-08-06 19:28:56,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:56,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751740505] [2021-08-06 19:28:56,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:56,027 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:56,087 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:28:56,087 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:28:56,093 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:56,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:56,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751740505] [2021-08-06 19:28:56,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751740505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:56,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693422501] [2021-08-06 19:28:56,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:28:56,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:56,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:56,095 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:56,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 19:28:57,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:28:57,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:57,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:28:57,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:57,994 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:28:57,995 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:28:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 27 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:58,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693422501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:58,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:58,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 16 [2021-08-06 19:28:58,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248211248] [2021-08-06 19:28:58,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:28:58,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:58,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:28:58,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:28:58,018 INFO L87 Difference]: Start difference. First operand 2238 states and 3749 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:58,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:58,714 INFO L93 Difference]: Finished difference Result 3181 states and 5155 transitions. [2021-08-06 19:28:58,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 19:28:58,715 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:28:58,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:58,718 INFO L225 Difference]: With dead ends: 3181 [2021-08-06 19:28:58,718 INFO L226 Difference]: Without dead ends: 3152 [2021-08-06 19:28:58,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 377.9ms TimeCoverageRelationStatistics Valid=330, Invalid=1152, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 19:28:58,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2021-08-06 19:28:58,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 2482. [2021-08-06 19:28:58,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2482 states, 2481 states have (on average 1.6731156791616284) internal successors, (4151), 2481 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:58,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 4151 transitions. [2021-08-06 19:28:58,740 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 4151 transitions. Word has length 38 [2021-08-06 19:28:58,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:58,740 INFO L470 AbstractCegarLoop]: Abstraction has 2482 states and 4151 transitions. [2021-08-06 19:28:58,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:58,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 4151 transitions. [2021-08-06 19:28:58,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:28:58,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:58,742 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:58,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-06 19:28:58,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:58,943 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:58,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:58,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1303543779, now seen corresponding path program 28 times [2021-08-06 19:28:58,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:58,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063467888] [2021-08-06 19:28:58,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:58,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:59,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:59,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063467888] [2021-08-06 19:28:59,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063467888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:59,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91832602] [2021-08-06 19:28:59,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:28:59,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:59,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:59,076 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:59,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 19:29:00,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:29:00,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:00,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:29:00,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:00,953 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:29:00,954 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:29:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:00,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91832602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:00,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:00,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-08-06 19:29:00,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468666584] [2021-08-06 19:29:00,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 19:29:00,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:00,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 19:29:00,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:29:00,973 INFO L87 Difference]: Start difference. First operand 2482 states and 4151 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:01,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:01,526 INFO L93 Difference]: Finished difference Result 4408 states and 7177 transitions. [2021-08-06 19:29:01,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:29:01,531 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:29:01,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:01,536 INFO L225 Difference]: With dead ends: 4408 [2021-08-06 19:29:01,536 INFO L226 Difference]: Without dead ends: 4408 [2021-08-06 19:29:01,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 248.6ms TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:29:01,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4408 states. [2021-08-06 19:29:01,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4408 to 2772. [2021-08-06 19:29:01,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2772 states, 2771 states have (on average 1.686394803320101) internal successors, (4673), 2771 states have internal predecessors, (4673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:01,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2772 states to 2772 states and 4673 transitions. [2021-08-06 19:29:01,580 INFO L78 Accepts]: Start accepts. Automaton has 2772 states and 4673 transitions. Word has length 41 [2021-08-06 19:29:01,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:01,580 INFO L470 AbstractCegarLoop]: Abstraction has 2772 states and 4673 transitions. [2021-08-06 19:29:01,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:01,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2772 states and 4673 transitions. [2021-08-06 19:29:01,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:29:01,582 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:01,582 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:01,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-06 19:29:01,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:01,797 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:01,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:01,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1951442536, now seen corresponding path program 49 times [2021-08-06 19:29:01,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:01,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349885548] [2021-08-06 19:29:01,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:01,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:01,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:01,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349885548] [2021-08-06 19:29:01,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349885548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:01,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644546971] [2021-08-06 19:29:01,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:29:01,925 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:01,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:01,926 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:01,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 19:29:03,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:03,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:29:03,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:03,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-08-06 19:29:03,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-08-06 19:29:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:03,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644546971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:03,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:03,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-08-06 19:29:03,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960742542] [2021-08-06 19:29:03,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:29:03,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:03,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:29:03,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:29:03,792 INFO L87 Difference]: Start difference. First operand 2772 states and 4673 transitions. Second operand has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:05,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:05,487 INFO L93 Difference]: Finished difference Result 5750 states and 8989 transitions. [2021-08-06 19:29:05,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-08-06 19:29:05,487 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:29:05,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:05,494 INFO L225 Difference]: With dead ends: 5750 [2021-08-06 19:29:05,494 INFO L226 Difference]: Without dead ends: 5682 [2021-08-06 19:29:05,495 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 1114.4ms TimeCoverageRelationStatistics Valid=779, Invalid=6531, Unknown=0, NotChecked=0, Total=7310 [2021-08-06 19:29:05,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5682 states. [2021-08-06 19:29:05,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5682 to 3300. [2021-08-06 19:29:05,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3300 states, 3299 states have (on average 1.6838435889663534) internal successors, (5555), 3299 states have internal predecessors, (5555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:05,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3300 states to 3300 states and 5555 transitions. [2021-08-06 19:29:05,530 INFO L78 Accepts]: Start accepts. Automaton has 3300 states and 5555 transitions. Word has length 41 [2021-08-06 19:29:05,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:05,530 INFO L470 AbstractCegarLoop]: Abstraction has 3300 states and 5555 transitions. [2021-08-06 19:29:05,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:05,530 INFO L276 IsEmpty]: Start isEmpty. Operand 3300 states and 5555 transitions. [2021-08-06 19:29:05,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:29:05,532 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:05,532 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:05,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-06 19:29:05,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:05,732 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:05,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:05,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1909220968, now seen corresponding path program 29 times [2021-08-06 19:29:05,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:05,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235517502] [2021-08-06 19:29:05,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:05,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:05,852 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:29:05,855 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:29:05,895 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:29:05,896 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:29:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:05,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:05,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235517502] [2021-08-06 19:29:05,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235517502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:05,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112232444] [2021-08-06 19:29:05,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:29:05,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:05,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:05,903 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:05,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 19:29:07,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:29:07,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:07,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 19:29:07,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:07,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112232444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:07,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:07,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-06 19:29:07,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789367105] [2021-08-06 19:29:07,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:29:07,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:07,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:29:07,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:29:07,740 INFO L87 Difference]: Start difference. First operand 3300 states and 5555 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:08,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:08,127 INFO L93 Difference]: Finished difference Result 3498 states and 5792 transitions. [2021-08-06 19:29:08,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:29:08,128 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:29:08,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:08,131 INFO L225 Difference]: With dead ends: 3498 [2021-08-06 19:29:08,131 INFO L226 Difference]: Without dead ends: 3404 [2021-08-06 19:29:08,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 193.4ms TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:29:08,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3404 states. [2021-08-06 19:29:08,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3404 to 3302. [2021-08-06 19:29:08,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3302 states, 3301 states have (on average 1.68130869433505) internal successors, (5550), 3301 states have internal predecessors, (5550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:08,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3302 states to 3302 states and 5550 transitions. [2021-08-06 19:29:08,158 INFO L78 Accepts]: Start accepts. Automaton has 3302 states and 5550 transitions. Word has length 41 [2021-08-06 19:29:08,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:08,158 INFO L470 AbstractCegarLoop]: Abstraction has 3302 states and 5550 transitions. [2021-08-06 19:29:08,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:08,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3302 states and 5550 transitions. [2021-08-06 19:29:08,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:29:08,160 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:08,160 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:08,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-06 19:29:08,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-08-06 19:29:08,361 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:08,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:08,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1890241661, now seen corresponding path program 50 times [2021-08-06 19:29:08,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:08,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345484574] [2021-08-06 19:29:08,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:08,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:08,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:08,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345484574] [2021-08-06 19:29:08,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345484574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:08,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185713700] [2021-08-06 19:29:08,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:29:08,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:08,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:08,480 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:08,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 19:29:10,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:29:10,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:10,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:29:10,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:10,305 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:29:10,305 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:29:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:10,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185713700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:10,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:10,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:29:10,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527466807] [2021-08-06 19:29:10,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:29:10,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:10,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:29:10,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:29:10,329 INFO L87 Difference]: Start difference. First operand 3302 states and 5550 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:10,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:10,447 INFO L93 Difference]: Finished difference Result 4208 states and 6921 transitions. [2021-08-06 19:29:10,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:29:10,448 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:29:10,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:10,452 INFO L225 Difference]: With dead ends: 4208 [2021-08-06 19:29:10,452 INFO L226 Difference]: Without dead ends: 4208 [2021-08-06 19:29:10,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:29:10,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2021-08-06 19:29:10,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 3543. [2021-08-06 19:29:10,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 3542 states have (on average 1.6936758893280632) internal successors, (5999), 3542 states have internal predecessors, (5999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:10,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 5999 transitions. [2021-08-06 19:29:10,487 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 5999 transitions. Word has length 41 [2021-08-06 19:29:10,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:10,487 INFO L470 AbstractCegarLoop]: Abstraction has 3543 states and 5999 transitions. [2021-08-06 19:29:10,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:10,487 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 5999 transitions. [2021-08-06 19:29:10,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:29:10,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:10,490 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:10,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:10,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-08-06 19:29:10,709 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:10,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:10,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1568094122, now seen corresponding path program 30 times [2021-08-06 19:29:10,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:10,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524055835] [2021-08-06 19:29:10,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:10,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:10,822 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:29:10,823 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:29:10,837 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:29:10,839 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:29:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:10,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:10,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524055835] [2021-08-06 19:29:10,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524055835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:10,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004245991] [2021-08-06 19:29:10,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:29:10,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:10,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:10,874 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:10,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 19:29:12,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:29:12,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:12,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:29:12,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:12,802 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-06 19:29:12,802 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-08-06 19:29:12,869 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:29:12,870 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:29:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:12,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004245991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:12,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:12,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2021-08-06 19:29:12,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470931863] [2021-08-06 19:29:12,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 19:29:12,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:12,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 19:29:12,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:29:12,889 INFO L87 Difference]: Start difference. First operand 3543 states and 5999 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:16,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:16,066 INFO L93 Difference]: Finished difference Result 5032 states and 8192 transitions. [2021-08-06 19:29:16,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-08-06 19:29:16,067 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:29:16,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:16,073 INFO L225 Difference]: With dead ends: 5032 [2021-08-06 19:29:16,073 INFO L226 Difference]: Without dead ends: 5022 [2021-08-06 19:29:16,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4722 ImplicationChecksByTransitivity, 2619.3ms TimeCoverageRelationStatistics Valid=2609, Invalid=11433, Unknown=0, NotChecked=0, Total=14042 [2021-08-06 19:29:16,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5022 states. [2021-08-06 19:29:16,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5022 to 3422. [2021-08-06 19:29:16,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3422 states, 3421 states have (on average 1.66150248465361) internal successors, (5684), 3421 states have internal predecessors, (5684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:16,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3422 states to 3422 states and 5684 transitions. [2021-08-06 19:29:16,120 INFO L78 Accepts]: Start accepts. Automaton has 3422 states and 5684 transitions. Word has length 41 [2021-08-06 19:29:16,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:16,120 INFO L470 AbstractCegarLoop]: Abstraction has 3422 states and 5684 transitions. [2021-08-06 19:29:16,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:16,120 INFO L276 IsEmpty]: Start isEmpty. Operand 3422 states and 5684 transitions. [2021-08-06 19:29:16,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:29:16,123 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:16,123 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:16,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-06 19:29:16,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:16,324 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:16,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:16,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1123943511, now seen corresponding path program 51 times [2021-08-06 19:29:16,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:16,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791357771] [2021-08-06 19:29:16,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:16,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 44 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:16,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:16,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791357771] [2021-08-06 19:29:16,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791357771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:16,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294093592] [2021-08-06 19:29:16,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:29:16,409 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:16,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:16,412 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:16,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 19:29:18,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:29:18,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:18,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:29:18,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:18,239 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:29:18,240 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:29:18,262 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:29:18,262 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:29:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:18,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294093592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:18,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:18,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:29:18,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934750699] [2021-08-06 19:29:18,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:29:18,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:18,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:29:18,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:29:18,313 INFO L87 Difference]: Start difference. First operand 3422 states and 5684 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:18,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:18,449 INFO L93 Difference]: Finished difference Result 4072 states and 6569 transitions. [2021-08-06 19:29:18,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:29:18,450 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:29:18,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:18,454 INFO L225 Difference]: With dead ends: 4072 [2021-08-06 19:29:18,454 INFO L226 Difference]: Without dead ends: 4070 [2021-08-06 19:29:18,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:29:18,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4070 states. [2021-08-06 19:29:18,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4070 to 3380. [2021-08-06 19:29:18,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3380 states, 3379 states have (on average 1.657591003255401) internal successors, (5601), 3379 states have internal predecessors, (5601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:18,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3380 states to 3380 states and 5601 transitions. [2021-08-06 19:29:18,488 INFO L78 Accepts]: Start accepts. Automaton has 3380 states and 5601 transitions. Word has length 41 [2021-08-06 19:29:18,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:18,488 INFO L470 AbstractCegarLoop]: Abstraction has 3380 states and 5601 transitions. [2021-08-06 19:29:18,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:18,489 INFO L276 IsEmpty]: Start isEmpty. Operand 3380 states and 5601 transitions. [2021-08-06 19:29:18,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:29:18,491 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:18,491 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:18,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-06 19:29:18,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:18,692 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:18,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:18,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1916079677, now seen corresponding path program 52 times [2021-08-06 19:29:18,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:18,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985907205] [2021-08-06 19:29:18,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:18,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:18,787 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:18,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:18,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985907205] [2021-08-06 19:29:18,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985907205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:18,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409923520] [2021-08-06 19:29:18,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:29:18,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:18,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:18,788 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:18,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 19:29:20,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:29:20,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:20,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:29:20,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:20,636 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:29:20,637 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:29:20,687 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:29:20,688 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:29:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:29:20,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409923520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:20,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:20,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:29:20,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291471720] [2021-08-06 19:29:20,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:29:20,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:20,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:29:20,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:29:20,714 INFO L87 Difference]: Start difference. First operand 3380 states and 5601 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:20,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:20,803 INFO L93 Difference]: Finished difference Result 4069 states and 6570 transitions. [2021-08-06 19:29:20,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:29:20,803 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:29:20,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:20,807 INFO L225 Difference]: With dead ends: 4069 [2021-08-06 19:29:20,807 INFO L226 Difference]: Without dead ends: 4067 [2021-08-06 19:29:20,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:29:20,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4067 states. [2021-08-06 19:29:20,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4067 to 3380. [2021-08-06 19:29:20,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3380 states, 3379 states have (on average 1.656999112163362) internal successors, (5599), 3379 states have internal predecessors, (5599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:20,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3380 states to 3380 states and 5599 transitions. [2021-08-06 19:29:20,839 INFO L78 Accepts]: Start accepts. Automaton has 3380 states and 5599 transitions. Word has length 41 [2021-08-06 19:29:20,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:20,839 INFO L470 AbstractCegarLoop]: Abstraction has 3380 states and 5599 transitions. [2021-08-06 19:29:20,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:20,839 INFO L276 IsEmpty]: Start isEmpty. Operand 3380 states and 5599 transitions. [2021-08-06 19:29:20,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:29:20,841 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:20,841 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:20,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:21,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:21,042 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:21,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:21,042 INFO L82 PathProgramCache]: Analyzing trace with hash -400690537, now seen corresponding path program 53 times [2021-08-06 19:29:21,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:21,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348603579] [2021-08-06 19:29:21,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:21,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:21,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:29:21,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:21,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348603579] [2021-08-06 19:29:21,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348603579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:21,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335042315] [2021-08-06 19:29:21,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:29:21,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:21,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:21,136 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:21,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 19:29:22,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:29:22,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:22,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:29:22,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:22,937 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:29:22,938 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:29:23,028 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:29:23,029 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:29:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:23,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335042315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:23,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:23,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2021-08-06 19:29:23,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652428971] [2021-08-06 19:29:23,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:29:23,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:23,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:29:23,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:29:23,055 INFO L87 Difference]: Start difference. First operand 3380 states and 5599 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:23,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:23,201 INFO L93 Difference]: Finished difference Result 4187 states and 6737 transitions. [2021-08-06 19:29:23,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:29:23,202 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:29:23,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:23,206 INFO L225 Difference]: With dead ends: 4187 [2021-08-06 19:29:23,206 INFO L226 Difference]: Without dead ends: 4171 [2021-08-06 19:29:23,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:29:23,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4171 states. [2021-08-06 19:29:23,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4171 to 3459. [2021-08-06 19:29:23,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 3458 states have (on average 1.6622325043377675) internal successors, (5748), 3458 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:23,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 5748 transitions. [2021-08-06 19:29:23,241 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 5748 transitions. Word has length 41 [2021-08-06 19:29:23,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:23,241 INFO L470 AbstractCegarLoop]: Abstraction has 3459 states and 5748 transitions. [2021-08-06 19:29:23,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:23,241 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 5748 transitions. [2021-08-06 19:29:23,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:29:23,244 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:23,244 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:23,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-06 19:29:23,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:23,444 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:23,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:23,445 INFO L82 PathProgramCache]: Analyzing trace with hash 822310909, now seen corresponding path program 54 times [2021-08-06 19:29:23,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:23,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255163976] [2021-08-06 19:29:23,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:23,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:29:23,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:23,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255163976] [2021-08-06 19:29:23,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255163976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:23,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402842748] [2021-08-06 19:29:23,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:29:23,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:23,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:23,569 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:23,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 19:29:25,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:29:25,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:25,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:29:25,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:25,425 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:29:25,426 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:29:25,540 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:29:25,540 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:29:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:29:25,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402842748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:25,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:25,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 19:29:25,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792413693] [2021-08-06 19:29:25,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:29:25,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:25,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:29:25,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:29:25,567 INFO L87 Difference]: Start difference. First operand 3459 states and 5748 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:25,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:25,701 INFO L93 Difference]: Finished difference Result 4151 states and 6668 transitions. [2021-08-06 19:29:25,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:29:25,702 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:29:25,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:25,706 INFO L225 Difference]: With dead ends: 4151 [2021-08-06 19:29:25,706 INFO L226 Difference]: Without dead ends: 4123 [2021-08-06 19:29:25,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:29:25,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-08-06 19:29:25,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3459. [2021-08-06 19:29:25,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 3458 states have (on average 1.661364950838635) internal successors, (5745), 3458 states have internal predecessors, (5745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:25,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 5745 transitions. [2021-08-06 19:29:25,741 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 5745 transitions. Word has length 41 [2021-08-06 19:29:25,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:25,741 INFO L470 AbstractCegarLoop]: Abstraction has 3459 states and 5745 transitions. [2021-08-06 19:29:25,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:25,741 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 5745 transitions. [2021-08-06 19:29:25,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:29:25,743 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:25,743 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:25,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:25,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-06 19:29:25,947 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:25,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:25,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1050816727, now seen corresponding path program 55 times [2021-08-06 19:29:25,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:25,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954738500] [2021-08-06 19:29:25,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:25,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:29:26,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:26,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954738500] [2021-08-06 19:29:26,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954738500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:26,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465291928] [2021-08-06 19:29:26,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:29:26,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:26,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:26,061 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:26,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 19:29:27,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:27,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:29:27,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:27,863 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:29:27,864 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:29:28,021 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:29:28,022 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:29:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:29:28,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465291928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:28,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:28,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 19:29:28,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500143609] [2021-08-06 19:29:28,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:29:28,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:28,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:29:28,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:29:28,048 INFO L87 Difference]: Start difference. First operand 3459 states and 5745 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:28,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:28,190 INFO L93 Difference]: Finished difference Result 4191 states and 6714 transitions. [2021-08-06 19:29:28,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:29:28,190 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:29:28,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:28,194 INFO L225 Difference]: With dead ends: 4191 [2021-08-06 19:29:28,194 INFO L226 Difference]: Without dead ends: 4151 [2021-08-06 19:29:28,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:29:28,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-08-06 19:29:28,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3321. [2021-08-06 19:29:28,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3321 states, 3320 states have (on average 1.6487951807228916) internal successors, (5474), 3320 states have internal predecessors, (5474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:28,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3321 states to 3321 states and 5474 transitions. [2021-08-06 19:29:28,243 INFO L78 Accepts]: Start accepts. Automaton has 3321 states and 5474 transitions. Word has length 41 [2021-08-06 19:29:28,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:28,243 INFO L470 AbstractCegarLoop]: Abstraction has 3321 states and 5474 transitions. [2021-08-06 19:29:28,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:28,243 INFO L276 IsEmpty]: Start isEmpty. Operand 3321 states and 5474 transitions. [2021-08-06 19:29:28,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:29:28,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:28,246 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:28,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:28,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-06 19:29:28,447 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:28,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:28,447 INFO L82 PathProgramCache]: Analyzing trace with hash 944476605, now seen corresponding path program 56 times [2021-08-06 19:29:28,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:28,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390752970] [2021-08-06 19:29:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:28,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:28,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:28,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390752970] [2021-08-06 19:29:28,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390752970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:28,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538366] [2021-08-06 19:29:28,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:29:28,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:28,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:28,576 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:28,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 19:29:30,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:29:30,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:30,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:29:30,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:30,431 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:29:30,432 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:29:30,754 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:30,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:30,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:30,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-08-06 19:29:30,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333352341] [2021-08-06 19:29:30,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 19:29:30,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:30,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 19:29:30,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:29:30,756 INFO L87 Difference]: Start difference. First operand 3321 states and 5474 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:30,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:30,939 INFO L93 Difference]: Finished difference Result 3910 states and 6263 transitions. [2021-08-06 19:29:30,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:29:30,939 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:29:30,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:30,943 INFO L225 Difference]: With dead ends: 3910 [2021-08-06 19:29:30,943 INFO L226 Difference]: Without dead ends: 3858 [2021-08-06 19:29:30,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 205.2ms TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:29:30,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3858 states. [2021-08-06 19:29:30,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3858 to 3343. [2021-08-06 19:29:30,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3343 states, 3342 states have (on average 1.6454219030520647) internal successors, (5499), 3342 states have internal predecessors, (5499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:30,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3343 states to 3343 states and 5499 transitions. [2021-08-06 19:29:30,975 INFO L78 Accepts]: Start accepts. Automaton has 3343 states and 5499 transitions. Word has length 41 [2021-08-06 19:29:30,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:30,976 INFO L470 AbstractCegarLoop]: Abstraction has 3343 states and 5499 transitions. [2021-08-06 19:29:30,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:30,976 INFO L276 IsEmpty]: Start isEmpty. Operand 3343 states and 5499 transitions. [2021-08-06 19:29:30,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:29:30,978 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:30,978 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:30,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:31,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-06 19:29:31,197 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:31,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:31,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1897580063, now seen corresponding path program 57 times [2021-08-06 19:29:31,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:31,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600736713] [2021-08-06 19:29:31,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:31,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:31,287 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:31,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:31,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600736713] [2021-08-06 19:29:31,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600736713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:31,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543864201] [2021-08-06 19:29:31,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:29:31,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:31,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:31,288 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:31,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 19:29:33,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 19:29:33,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:33,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:29:33,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:33,324 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:29:33,325 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:29:33,352 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:33,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543864201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:33,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:33,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:29:33,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862434738] [2021-08-06 19:29:33,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:29:33,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:33,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:29:33,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:29:33,353 INFO L87 Difference]: Start difference. First operand 3343 states and 5499 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:33,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:33,527 INFO L93 Difference]: Finished difference Result 4015 states and 6500 transitions. [2021-08-06 19:29:33,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:29:33,527 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:29:33,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:33,532 INFO L225 Difference]: With dead ends: 4015 [2021-08-06 19:29:33,532 INFO L226 Difference]: Without dead ends: 4015 [2021-08-06 19:29:33,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:29:33,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4015 states. [2021-08-06 19:29:33,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4015 to 3460. [2021-08-06 19:29:33,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3460 states, 3459 states have (on average 1.653078924544666) internal successors, (5718), 3459 states have internal predecessors, (5718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:33,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3460 states to 3460 states and 5718 transitions. [2021-08-06 19:29:33,574 INFO L78 Accepts]: Start accepts. Automaton has 3460 states and 5718 transitions. Word has length 41 [2021-08-06 19:29:33,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:33,574 INFO L470 AbstractCegarLoop]: Abstraction has 3460 states and 5718 transitions. [2021-08-06 19:29:33,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:33,574 INFO L276 IsEmpty]: Start isEmpty. Operand 3460 states and 5718 transitions. [2021-08-06 19:29:33,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:29:33,576 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:33,577 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:33,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:33,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-06 19:29:33,796 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:33,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:33,796 INFO L82 PathProgramCache]: Analyzing trace with hash 951924648, now seen corresponding path program 31 times [2021-08-06 19:29:33,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:33,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689828011] [2021-08-06 19:29:33,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:33,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:33,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:33,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689828011] [2021-08-06 19:29:33,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689828011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:33,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887185392] [2021-08-06 19:29:33,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:29:33,887 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:33,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:33,888 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:33,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 19:29:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:35,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 19:29:35,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:35,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887185392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:35,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:35,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:29:35,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137629573] [2021-08-06 19:29:35,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:29:35,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:35,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:29:35,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:29:35,909 INFO L87 Difference]: Start difference. First operand 3460 states and 5718 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:36,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:36,186 INFO L93 Difference]: Finished difference Result 4112 states and 6639 transitions. [2021-08-06 19:29:36,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:29:36,186 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:29:36,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:36,191 INFO L225 Difference]: With dead ends: 4112 [2021-08-06 19:29:36,192 INFO L226 Difference]: Without dead ends: 4097 [2021-08-06 19:29:36,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:29:36,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4097 states. [2021-08-06 19:29:36,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4097 to 3533. [2021-08-06 19:29:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3533 states, 3532 states have (on average 1.6494903737259343) internal successors, (5826), 3532 states have internal predecessors, (5826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:36,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3533 states to 3533 states and 5826 transitions. [2021-08-06 19:29:36,233 INFO L78 Accepts]: Start accepts. Automaton has 3533 states and 5826 transitions. Word has length 41 [2021-08-06 19:29:36,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:36,233 INFO L470 AbstractCegarLoop]: Abstraction has 3533 states and 5826 transitions. [2021-08-06 19:29:36,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:36,233 INFO L276 IsEmpty]: Start isEmpty. Operand 3533 states and 5826 transitions. [2021-08-06 19:29:36,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:29:36,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:36,237 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:36,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-06 19:29:36,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 19:29:36,437 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:36,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:36,438 INFO L82 PathProgramCache]: Analyzing trace with hash -651005015, now seen corresponding path program 58 times [2021-08-06 19:29:36,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:36,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437841650] [2021-08-06 19:29:36,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:36,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:36,533 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 49 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:36,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:36,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437841650] [2021-08-06 19:29:36,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437841650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:36,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275312368] [2021-08-06 19:29:36,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:29:36,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:36,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:36,535 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:36,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 19:29:38,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:29:38,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:38,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:29:38,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:38,570 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:29:38,571 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:29:38,595 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:29:38,595 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:29:38,622 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:38,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275312368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:38,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:38,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:29:38,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663946111] [2021-08-06 19:29:38,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:29:38,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:38,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:29:38,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:29:38,623 INFO L87 Difference]: Start difference. First operand 3533 states and 5826 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:38,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:38,734 INFO L93 Difference]: Finished difference Result 4085 states and 6581 transitions. [2021-08-06 19:29:38,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:29:38,735 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:29:38,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:38,739 INFO L225 Difference]: With dead ends: 4085 [2021-08-06 19:29:38,739 INFO L226 Difference]: Without dead ends: 4081 [2021-08-06 19:29:38,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:29:38,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4081 states. [2021-08-06 19:29:38,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4081 to 3508. [2021-08-06 19:29:38,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3508 states, 3507 states have (on average 1.6481323068149416) internal successors, (5780), 3507 states have internal predecessors, (5780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:38,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3508 states to 3508 states and 5780 transitions. [2021-08-06 19:29:38,776 INFO L78 Accepts]: Start accepts. Automaton has 3508 states and 5780 transitions. Word has length 41 [2021-08-06 19:29:38,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:38,777 INFO L470 AbstractCegarLoop]: Abstraction has 3508 states and 5780 transitions. [2021-08-06 19:29:38,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:38,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3508 states and 5780 transitions. [2021-08-06 19:29:38,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:29:38,779 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:38,779 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:38,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-06 19:29:38,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:38,980 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:38,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:38,980 INFO L82 PathProgramCache]: Analyzing trace with hash -342057048, now seen corresponding path program 59 times [2021-08-06 19:29:38,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:38,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465724887] [2021-08-06 19:29:38,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:38,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:39,061 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:29:39,063 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:29:39,085 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:29:39,086 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:29:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:39,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:39,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465724887] [2021-08-06 19:29:39,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465724887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:39,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756765997] [2021-08-06 19:29:39,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:29:39,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:39,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:39,093 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:39,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 19:29:40,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-06 19:29:40,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:40,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 19:29:40,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:41,259 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:41,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756765997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:41,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:41,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-06 19:29:41,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716576059] [2021-08-06 19:29:41,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:29:41,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:41,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:29:41,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:29:41,260 INFO L87 Difference]: Start difference. First operand 3508 states and 5780 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:41,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:41,663 INFO L93 Difference]: Finished difference Result 3720 states and 6037 transitions. [2021-08-06 19:29:41,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:29:41,664 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:29:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:41,668 INFO L225 Difference]: With dead ends: 3720 [2021-08-06 19:29:41,668 INFO L226 Difference]: Without dead ends: 3651 [2021-08-06 19:29:41,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:29:41,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3651 states. [2021-08-06 19:29:41,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3651 to 3433. [2021-08-06 19:29:41,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3433 states, 3432 states have (on average 1.650058275058275) internal successors, (5663), 3432 states have internal predecessors, (5663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:41,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3433 states to 3433 states and 5663 transitions. [2021-08-06 19:29:41,700 INFO L78 Accepts]: Start accepts. Automaton has 3433 states and 5663 transitions. Word has length 41 [2021-08-06 19:29:41,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:41,700 INFO L470 AbstractCegarLoop]: Abstraction has 3433 states and 5663 transitions. [2021-08-06 19:29:41,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:41,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3433 states and 5663 transitions. [2021-08-06 19:29:41,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:29:41,702 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:41,702 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:41,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:41,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:41,903 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:41,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:41,903 INFO L82 PathProgramCache]: Analyzing trace with hash 842871016, now seen corresponding path program 60 times [2021-08-06 19:29:41,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:41,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850876092] [2021-08-06 19:29:41,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:41,903 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:41,967 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:29:41,968 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:29:41,974 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:29:41,976 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:29:42,004 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:29:42,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:42,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850876092] [2021-08-06 19:29:42,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850876092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:42,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406533221] [2021-08-06 19:29:42,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:29:42,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:42,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:42,006 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:42,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 19:29:43,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 19:29:43,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:43,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 19:29:43,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:29:44,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406533221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:44,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:44,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:29:44,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727744322] [2021-08-06 19:29:44,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:29:44,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:44,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:29:44,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:29:44,082 INFO L87 Difference]: Start difference. First operand 3433 states and 5663 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:44,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:44,254 INFO L93 Difference]: Finished difference Result 3789 states and 6179 transitions. [2021-08-06 19:29:44,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:29:44,254 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:29:44,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:44,258 INFO L225 Difference]: With dead ends: 3789 [2021-08-06 19:29:44,258 INFO L226 Difference]: Without dead ends: 3779 [2021-08-06 19:29:44,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:29:44,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3779 states. [2021-08-06 19:29:44,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3779 to 3434. [2021-08-06 19:29:44,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 1.6501602097291) internal successors, (5665), 3433 states have internal predecessors, (5665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:44,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 5665 transitions. [2021-08-06 19:29:44,285 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 5665 transitions. Word has length 41 [2021-08-06 19:29:44,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:44,285 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 5665 transitions. [2021-08-06 19:29:44,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:44,286 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 5665 transitions. [2021-08-06 19:29:44,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:29:44,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:44,288 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:44,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-06 19:29:44,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-08-06 19:29:44,488 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:44,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:44,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1197232362, now seen corresponding path program 32 times [2021-08-06 19:29:44,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:44,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675866546] [2021-08-06 19:29:44,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:44,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:44,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:44,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:44,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675866546] [2021-08-06 19:29:44,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675866546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:44,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792187615] [2021-08-06 19:29:44,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:29:44,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:44,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:44,586 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:44,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 19:29:46,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:29:46,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:46,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 19:29:46,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:46,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792187615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:46,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:46,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-06 19:29:46,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213546670] [2021-08-06 19:29:46,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:29:46,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:46,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:29:46,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:29:46,777 INFO L87 Difference]: Start difference. First operand 3434 states and 5665 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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) [2021-08-06 19:29:47,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:47,064 INFO L93 Difference]: Finished difference Result 4276 states and 6869 transitions. [2021-08-06 19:29:47,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:29:47,064 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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 41 [2021-08-06 19:29:47,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:47,068 INFO L225 Difference]: With dead ends: 4276 [2021-08-06 19:29:47,068 INFO L226 Difference]: Without dead ends: 4255 [2021-08-06 19:29:47,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:29:47,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4255 states. [2021-08-06 19:29:47,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4255 to 3501. [2021-08-06 19:29:47,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3501 states, 3500 states have (on average 1.6468571428571428) internal successors, (5764), 3500 states have internal predecessors, (5764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:47,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3501 states to 3501 states and 5764 transitions. [2021-08-06 19:29:47,097 INFO L78 Accepts]: Start accepts. Automaton has 3501 states and 5764 transitions. Word has length 41 [2021-08-06 19:29:47,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:47,098 INFO L470 AbstractCegarLoop]: Abstraction has 3501 states and 5764 transitions. [2021-08-06 19:29:47,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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) [2021-08-06 19:29:47,098 INFO L276 IsEmpty]: Start isEmpty. Operand 3501 states and 5764 transitions. [2021-08-06 19:29:47,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:29:47,100 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:47,100 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:47,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-06 19:29:47,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-06 19:29:47,308 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:47,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:47,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1034808618, now seen corresponding path program 61 times [2021-08-06 19:29:47,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:47,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547262337] [2021-08-06 19:29:47,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:47,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:47,391 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:29:47,394 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:29:47,414 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:29:47,414 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:29:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:47,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:47,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547262337] [2021-08-06 19:29:47,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547262337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:47,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933300600] [2021-08-06 19:29:47,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:29:47,420 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:47,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:47,421 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:47,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 19:29:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:49,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 19:29:49,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:49,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933300600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:49,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:49,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 19:29:49,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405323486] [2021-08-06 19:29:49,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:29:49,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:49,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:29:49,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:29:49,635 INFO L87 Difference]: Start difference. First operand 3501 states and 5764 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:50,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:50,082 INFO L93 Difference]: Finished difference Result 3677 states and 5973 transitions. [2021-08-06 19:29:50,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:29:50,083 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:29:50,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:50,086 INFO L225 Difference]: With dead ends: 3677 [2021-08-06 19:29:50,086 INFO L226 Difference]: Without dead ends: 3614 [2021-08-06 19:29:50,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:29:50,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3614 states. [2021-08-06 19:29:50,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3614 to 3413. [2021-08-06 19:29:50,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 1.6468347010550997) internal successors, (5619), 3412 states have internal predecessors, (5619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:50,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 5619 transitions. [2021-08-06 19:29:50,114 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 5619 transitions. Word has length 41 [2021-08-06 19:29:50,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:50,114 INFO L470 AbstractCegarLoop]: Abstraction has 3413 states and 5619 transitions. [2021-08-06 19:29:50,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:50,115 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 5619 transitions. [2021-08-06 19:29:50,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:29:50,117 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:50,117 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:50,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-06 19:29:50,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:50,317 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:50,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:50,318 INFO L82 PathProgramCache]: Analyzing trace with hash 833813380, now seen corresponding path program 62 times [2021-08-06 19:29:50,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:50,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409102998] [2021-08-06 19:29:50,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:50,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:50,381 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:29:50,382 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:29:50,389 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:29:50,391 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:29:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:29:50,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:50,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409102998] [2021-08-06 19:29:50,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409102998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:50,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393300482] [2021-08-06 19:29:50,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:29:50,419 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:50,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:50,420 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:50,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 19:29:52,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:29:52,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:52,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 19:29:52,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:29:52,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393300482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:52,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:52,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:29:52,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109379496] [2021-08-06 19:29:52,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:29:52,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:52,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:29:52,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:29:52,556 INFO L87 Difference]: Start difference. First operand 3413 states and 5619 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:52,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:52,717 INFO L93 Difference]: Finished difference Result 3784 states and 6164 transitions. [2021-08-06 19:29:52,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:29:52,719 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:29:52,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:52,722 INFO L225 Difference]: With dead ends: 3784 [2021-08-06 19:29:52,722 INFO L226 Difference]: Without dead ends: 3774 [2021-08-06 19:29:52,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:29:52,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3774 states. [2021-08-06 19:29:52,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3774 to 3414. [2021-08-06 19:29:52,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3414 states, 3413 states have (on average 1.646938177556402) internal successors, (5621), 3413 states have internal predecessors, (5621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:52,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3414 states to 3414 states and 5621 transitions. [2021-08-06 19:29:52,751 INFO L78 Accepts]: Start accepts. Automaton has 3414 states and 5621 transitions. Word has length 41 [2021-08-06 19:29:52,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:52,751 INFO L470 AbstractCegarLoop]: Abstraction has 3414 states and 5621 transitions. [2021-08-06 19:29:52,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:52,751 INFO L276 IsEmpty]: Start isEmpty. Operand 3414 states and 5621 transitions. [2021-08-06 19:29:52,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:29:52,753 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:52,754 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:52,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:52,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:52,973 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:52,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:52,973 INFO L82 PathProgramCache]: Analyzing trace with hash 465466301, now seen corresponding path program 63 times [2021-08-06 19:29:52,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:52,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463806182] [2021-08-06 19:29:52,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:52,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:53,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:53,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463806182] [2021-08-06 19:29:53,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463806182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:53,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897311212] [2021-08-06 19:29:53,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:29:53,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:53,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:53,079 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:53,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 19:29:55,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 19:29:55,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:55,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:29:55,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:55,219 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:29:55,220 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:29:55,270 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:29:55,271 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:29:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:29:55,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897311212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:55,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:55,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:29:55,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842894730] [2021-08-06 19:29:55,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:29:55,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:55,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:29:55,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:29:55,297 INFO L87 Difference]: Start difference. First operand 3414 states and 5621 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:55,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:55,397 INFO L93 Difference]: Finished difference Result 3766 states and 6092 transitions. [2021-08-06 19:29:55,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:29:55,397 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:29:55,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:55,401 INFO L225 Difference]: With dead ends: 3766 [2021-08-06 19:29:55,401 INFO L226 Difference]: Without dead ends: 3762 [2021-08-06 19:29:55,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:29:55,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3762 states. [2021-08-06 19:29:55,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3762 to 3392. [2021-08-06 19:29:55,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3392 states, 3391 states have (on average 1.645532291359481) internal successors, (5580), 3391 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:55,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3392 states to 3392 states and 5580 transitions. [2021-08-06 19:29:55,429 INFO L78 Accepts]: Start accepts. Automaton has 3392 states and 5580 transitions. Word has length 41 [2021-08-06 19:29:55,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:55,429 INFO L470 AbstractCegarLoop]: Abstraction has 3392 states and 5580 transitions. [2021-08-06 19:29:55,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:55,429 INFO L276 IsEmpty]: Start isEmpty. Operand 3392 states and 5580 transitions. [2021-08-06 19:29:55,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:29:55,431 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:55,432 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:55,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-06 19:29:55,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-08-06 19:29:55,632 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:55,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:55,633 INFO L82 PathProgramCache]: Analyzing trace with hash -66522015, now seen corresponding path program 64 times [2021-08-06 19:29:55,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:55,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646187101] [2021-08-06 19:29:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:55,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:55,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:55,757 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:55,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:55,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646187101] [2021-08-06 19:29:55,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646187101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:55,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254989847] [2021-08-06 19:29:55,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:29:55,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:55,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:55,758 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:55,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 19:29:57,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:29:57,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:57,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:29:57,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:58,025 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:29:58,026 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:29:58,048 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:58,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254989847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:58,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:58,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:29:58,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983344078] [2021-08-06 19:29:58,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:29:58,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:58,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:29:58,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:29:58,049 INFO L87 Difference]: Start difference. First operand 3392 states and 5580 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:58,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:58,297 INFO L93 Difference]: Finished difference Result 3938 states and 6412 transitions. [2021-08-06 19:29:58,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:29:58,297 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:29:58,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:58,301 INFO L225 Difference]: With dead ends: 3938 [2021-08-06 19:29:58,301 INFO L226 Difference]: Without dead ends: 3938 [2021-08-06 19:29:58,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:29:58,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2021-08-06 19:29:58,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3547. [2021-08-06 19:29:58,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3547 states, 3546 states have (on average 1.655668358714044) internal successors, (5871), 3546 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:58,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3547 states to 3547 states and 5871 transitions. [2021-08-06 19:29:58,333 INFO L78 Accepts]: Start accepts. Automaton has 3547 states and 5871 transitions. Word has length 41 [2021-08-06 19:29:58,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:58,333 INFO L470 AbstractCegarLoop]: Abstraction has 3547 states and 5871 transitions. [2021-08-06 19:29:58,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:58,333 INFO L276 IsEmpty]: Start isEmpty. Operand 3547 states and 5871 transitions. [2021-08-06 19:29:58,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:29:58,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:58,336 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:58,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-06 19:29:58,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-06 19:29:58,536 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:58,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:58,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1656235800, now seen corresponding path program 33 times [2021-08-06 19:29:58,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:58,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498314836] [2021-08-06 19:29:58,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:58,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:58,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:58,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498314836] [2021-08-06 19:29:58,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498314836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:58,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016572955] [2021-08-06 19:29:58,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:29:58,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:58,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:58,644 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:58,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 19:30:00,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 19:30:00,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:00,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 19:30:00,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:00,924 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:00,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016572955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:00,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:00,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:30:00,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086100797] [2021-08-06 19:30:00,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:30:00,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:00,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:30:00,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:30:00,925 INFO L87 Difference]: Start difference. First operand 3547 states and 5871 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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) [2021-08-06 19:30:01,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:01,254 INFO L93 Difference]: Finished difference Result 4314 states and 6993 transitions. [2021-08-06 19:30:01,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:30:01,254 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 41 [2021-08-06 19:30:01,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:01,259 INFO L225 Difference]: With dead ends: 4314 [2021-08-06 19:30:01,259 INFO L226 Difference]: Without dead ends: 4287 [2021-08-06 19:30:01,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 166.4ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:30:01,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4287 states. [2021-08-06 19:30:01,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4287 to 3716. [2021-08-06 19:30:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 1.6519515477792732) internal successors, (6137), 3715 states have internal predecessors, (6137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:01,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 6137 transitions. [2021-08-06 19:30:01,295 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 6137 transitions. Word has length 41 [2021-08-06 19:30:01,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:01,295 INFO L470 AbstractCegarLoop]: Abstraction has 3716 states and 6137 transitions. [2021-08-06 19:30:01,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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) [2021-08-06 19:30:01,295 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 6137 transitions. [2021-08-06 19:30:01,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:30:01,297 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:01,297 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:01,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-06 19:30:01,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-06 19:30:01,498 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:01,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:01,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1035801833, now seen corresponding path program 65 times [2021-08-06 19:30:01,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:01,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730156064] [2021-08-06 19:30:01,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:01,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:01,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:01,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730156064] [2021-08-06 19:30:01,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730156064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:01,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868550185] [2021-08-06 19:30:01,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:30:01,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:01,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:01,613 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:01,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 19:30:03,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 19:30:03,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:03,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:30:03,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:03,826 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:30:03,827 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:30:03,848 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:30:03,849 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:30:03,874 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 51 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:03,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868550185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:03,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:03,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 15 [2021-08-06 19:30:03,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198279180] [2021-08-06 19:30:03,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:30:03,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:03,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:30:03,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:30:03,875 INFO L87 Difference]: Start difference. First operand 3716 states and 6137 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:04,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:04,133 INFO L93 Difference]: Finished difference Result 4338 states and 6996 transitions. [2021-08-06 19:30:04,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:30:04,133 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:30:04,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:04,138 INFO L225 Difference]: With dead ends: 4338 [2021-08-06 19:30:04,139 INFO L226 Difference]: Without dead ends: 4332 [2021-08-06 19:30:04,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:30:04,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4332 states. [2021-08-06 19:30:04,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4332 to 3499. [2021-08-06 19:30:04,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3499 states, 3498 states have (on average 1.6417953116066324) internal successors, (5743), 3498 states have internal predecessors, (5743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:04,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3499 states to 3499 states and 5743 transitions. [2021-08-06 19:30:04,182 INFO L78 Accepts]: Start accepts. Automaton has 3499 states and 5743 transitions. Word has length 41 [2021-08-06 19:30:04,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:04,182 INFO L470 AbstractCegarLoop]: Abstraction has 3499 states and 5743 transitions. [2021-08-06 19:30:04,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:04,182 INFO L276 IsEmpty]: Start isEmpty. Operand 3499 states and 5743 transitions. [2021-08-06 19:30:04,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:30:04,185 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:04,185 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:04,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-06 19:30:04,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:04,386 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:04,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:04,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1478973208, now seen corresponding path program 66 times [2021-08-06 19:30:04,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:04,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308014833] [2021-08-06 19:30:04,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:04,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:04,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:04,485 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:30:04,487 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:30:04,508 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:30:04,509 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:30:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:04,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:04,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308014833] [2021-08-06 19:30:04,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308014833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:04,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327816465] [2021-08-06 19:30:04,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:30:04,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:04,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:04,515 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:04,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 19:30:06,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 19:30:06,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:06,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 19:30:06,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:07,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327816465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:07,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:07,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-06 19:30:07,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354672411] [2021-08-06 19:30:07,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:30:07,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:07,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:30:07,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:30:07,002 INFO L87 Difference]: Start difference. First operand 3499 states and 5743 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:07,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:07,577 INFO L93 Difference]: Finished difference Result 3627 states and 5894 transitions. [2021-08-06 19:30:07,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:30:07,578 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:30:07,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:07,582 INFO L225 Difference]: With dead ends: 3627 [2021-08-06 19:30:07,582 INFO L226 Difference]: Without dead ends: 3570 [2021-08-06 19:30:07,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:30:07,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3570 states. [2021-08-06 19:30:07,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3570 to 3430. [2021-08-06 19:30:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 1.6392534266550014) internal successors, (5621), 3429 states have internal predecessors, (5621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:07,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 5621 transitions. [2021-08-06 19:30:07,617 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 5621 transitions. Word has length 41 [2021-08-06 19:30:07,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:07,617 INFO L470 AbstractCegarLoop]: Abstraction has 3430 states and 5621 transitions. [2021-08-06 19:30:07,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:07,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 5621 transitions. [2021-08-06 19:30:07,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:30:07,620 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:07,620 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:07,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-06 19:30:07,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-06 19:30:07,821 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:07,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:07,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1580718952, now seen corresponding path program 67 times [2021-08-06 19:30:07,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:07,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176794964] [2021-08-06 19:30:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:07,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:07,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:07,881 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:30:07,882 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:30:07,888 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:30:07,891 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:30:07,919 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:30:07,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:07,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176794964] [2021-08-06 19:30:07,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176794964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:07,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589914184] [2021-08-06 19:30:07,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:30:07,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:07,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:07,920 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:07,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 19:30:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:10,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 19:30:10,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:30:10,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589914184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:10,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:10,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:30:10,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483912552] [2021-08-06 19:30:10,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:30:10,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:10,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:30:10,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:30:10,284 INFO L87 Difference]: Start difference. First operand 3430 states and 5621 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:10,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:10,444 INFO L93 Difference]: Finished difference Result 3731 states and 6061 transitions. [2021-08-06 19:30:10,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:30:10,444 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:30:10,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:10,448 INFO L225 Difference]: With dead ends: 3731 [2021-08-06 19:30:10,448 INFO L226 Difference]: Without dead ends: 3721 [2021-08-06 19:30:10,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:30:10,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2021-08-06 19:30:10,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3431. [2021-08-06 19:30:10,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3431 states, 3430 states have (on average 1.6393586005830905) internal successors, (5623), 3430 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:10,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3431 states to 3431 states and 5623 transitions. [2021-08-06 19:30:10,482 INFO L78 Accepts]: Start accepts. Automaton has 3431 states and 5623 transitions. Word has length 41 [2021-08-06 19:30:10,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:10,482 INFO L470 AbstractCegarLoop]: Abstraction has 3431 states and 5623 transitions. [2021-08-06 19:30:10,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:10,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3431 states and 5623 transitions. [2021-08-06 19:30:10,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:30:10,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:10,484 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:10,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:10,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-08-06 19:30:10,685 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:10,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:10,685 INFO L82 PathProgramCache]: Analyzing trace with hash -651786794, now seen corresponding path program 34 times [2021-08-06 19:30:10,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:10,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322483897] [2021-08-06 19:30:10,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:10,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:10,813 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:10,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:10,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322483897] [2021-08-06 19:30:10,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322483897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:10,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271970064] [2021-08-06 19:30:10,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:30:10,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:10,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:10,815 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:10,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 19:30:12,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:30:12,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:12,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 19:30:12,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:13,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271970064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:13,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:13,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-08-06 19:30:13,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126312642] [2021-08-06 19:30:13,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:30:13,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:13,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:30:13,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:30:13,162 INFO L87 Difference]: Start difference. First operand 3431 states and 5623 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:13,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:13,776 INFO L93 Difference]: Finished difference Result 4224 states and 6769 transitions. [2021-08-06 19:30:13,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 19:30:13,776 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:30:13,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:13,781 INFO L225 Difference]: With dead ends: 4224 [2021-08-06 19:30:13,781 INFO L226 Difference]: Without dead ends: 4191 [2021-08-06 19:30:13,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 438.3ms TimeCoverageRelationStatistics Valid=254, Invalid=1468, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 19:30:13,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4191 states. [2021-08-06 19:30:13,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4191 to 3396. [2021-08-06 19:30:13,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3396 states, 3395 states have (on average 1.6385861561119293) internal successors, (5563), 3395 states have internal predecessors, (5563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:13,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3396 states to 3396 states and 5563 transitions. [2021-08-06 19:30:13,816 INFO L78 Accepts]: Start accepts. Automaton has 3396 states and 5563 transitions. Word has length 41 [2021-08-06 19:30:13,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:13,816 INFO L470 AbstractCegarLoop]: Abstraction has 3396 states and 5563 transitions. [2021-08-06 19:30:13,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:13,816 INFO L276 IsEmpty]: Start isEmpty. Operand 3396 states and 5563 transitions. [2021-08-06 19:30:13,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:30:13,818 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:13,819 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:13,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:14,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-08-06 19:30:14,020 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:14,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:14,021 INFO L82 PathProgramCache]: Analyzing trace with hash -792034922, now seen corresponding path program 68 times [2021-08-06 19:30:14,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:14,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263553385] [2021-08-06 19:30:14,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:14,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:14,152 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 74.1 percent of original size [2021-08-06 19:30:14,160 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 74.1 percent of original size [2021-08-06 19:30:14,183 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:30:14,184 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:30:14,189 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:14,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:14,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263553385] [2021-08-06 19:30:14,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263553385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:14,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248905474] [2021-08-06 19:30:14,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:30:14,190 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:14,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:14,191 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:14,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 19:30:16,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:30:16,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:16,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 19:30:16,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:16,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248905474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:16,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:16,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-06 19:30:16,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674527932] [2021-08-06 19:30:16,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:30:16,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:16,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:30:16,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:30:16,728 INFO L87 Difference]: Start difference. First operand 3396 states and 5563 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:17,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:17,242 INFO L93 Difference]: Finished difference Result 3537 states and 5733 transitions. [2021-08-06 19:30:17,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:30:17,242 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:30:17,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:17,246 INFO L225 Difference]: With dead ends: 3537 [2021-08-06 19:30:17,246 INFO L226 Difference]: Without dead ends: 3477 [2021-08-06 19:30:17,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:30:17,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3477 states. [2021-08-06 19:30:17,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3477 to 3333. [2021-08-06 19:30:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3333 states, 3332 states have (on average 1.6392557022809124) internal successors, (5462), 3332 states have internal predecessors, (5462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:17,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3333 states to 3333 states and 5462 transitions. [2021-08-06 19:30:17,277 INFO L78 Accepts]: Start accepts. Automaton has 3333 states and 5462 transitions. Word has length 41 [2021-08-06 19:30:17,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:17,277 INFO L470 AbstractCegarLoop]: Abstraction has 3333 states and 5462 transitions. [2021-08-06 19:30:17,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:17,277 INFO L276 IsEmpty]: Start isEmpty. Operand 3333 states and 5462 transitions. [2021-08-06 19:30:17,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:30:17,279 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:17,279 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:17,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-06 19:30:17,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-06 19:30:17,480 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:17,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:17,480 INFO L82 PathProgramCache]: Analyzing trace with hash 419053828, now seen corresponding path program 69 times [2021-08-06 19:30:17,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:17,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522285009] [2021-08-06 19:30:17,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:17,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:17,578 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:30:17,579 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:30:17,615 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 73.7 percent of original size [2021-08-06 19:30:17,617 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 73.7 percent of original size [2021-08-06 19:30:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:17,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:17,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522285009] [2021-08-06 19:30:17,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522285009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:17,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591645135] [2021-08-06 19:30:17,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:30:17,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:17,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:17,653 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:17,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 19:30:19,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 19:30:19,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:19,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 19:30:19,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:20,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591645135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:20,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:20,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 13 [2021-08-06 19:30:20,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591675246] [2021-08-06 19:30:20,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:30:20,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:20,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:30:20,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:30:20,072 INFO L87 Difference]: Start difference. First operand 3333 states and 5462 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:20,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:20,391 INFO L93 Difference]: Finished difference Result 3618 states and 5863 transitions. [2021-08-06 19:30:20,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:30:20,391 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:30:20,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:20,395 INFO L225 Difference]: With dead ends: 3618 [2021-08-06 19:30:20,395 INFO L226 Difference]: Without dead ends: 3618 [2021-08-06 19:30:20,396 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:30:20,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3618 states. [2021-08-06 19:30:20,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3618 to 3349. [2021-08-06 19:30:20,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3349 states, 3348 states have (on average 1.640979689366786) internal successors, (5494), 3348 states have internal predecessors, (5494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:20,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3349 states to 3349 states and 5494 transitions. [2021-08-06 19:30:20,427 INFO L78 Accepts]: Start accepts. Automaton has 3349 states and 5494 transitions. Word has length 41 [2021-08-06 19:30:20,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:20,427 INFO L470 AbstractCegarLoop]: Abstraction has 3349 states and 5494 transitions. [2021-08-06 19:30:20,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:20,427 INFO L276 IsEmpty]: Start isEmpty. Operand 3349 states and 5494 transitions. [2021-08-06 19:30:20,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:30:20,430 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:20,430 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:20,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:20,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:20,639 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:20,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:20,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1255685341, now seen corresponding path program 35 times [2021-08-06 19:30:20,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:20,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329665448] [2021-08-06 19:30:20,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:20,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:20,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:20,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329665448] [2021-08-06 19:30:20,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329665448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:20,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803747123] [2021-08-06 19:30:20,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:30:20,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:20,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:20,731 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:20,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 19:30:22,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 19:30:22,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:22,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:30:22,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:23,182 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:30:23,183 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:30:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:23,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803747123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:23,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:23,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2021-08-06 19:30:23,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875051391] [2021-08-06 19:30:23,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:30:23,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:23,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:30:23,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:30:23,202 INFO L87 Difference]: Start difference. First operand 3349 states and 5494 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:23,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:23,368 INFO L93 Difference]: Finished difference Result 4646 states and 7468 transitions. [2021-08-06 19:30:23,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:30:23,369 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:30:23,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:23,374 INFO L225 Difference]: With dead ends: 4646 [2021-08-06 19:30:23,374 INFO L226 Difference]: Without dead ends: 4646 [2021-08-06 19:30:23,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:30:23,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2021-08-06 19:30:23,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 3627. [2021-08-06 19:30:23,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3626 states have (on average 1.6522338665195808) internal successors, (5991), 3626 states have internal predecessors, (5991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:23,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 5991 transitions. [2021-08-06 19:30:23,420 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 5991 transitions. Word has length 41 [2021-08-06 19:30:23,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:23,420 INFO L470 AbstractCegarLoop]: Abstraction has 3627 states and 5991 transitions. [2021-08-06 19:30:23,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:23,420 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 5991 transitions. [2021-08-06 19:30:23,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:30:23,423 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:23,423 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:23,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-06 19:30:23,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:23,623 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:23,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:23,623 INFO L82 PathProgramCache]: Analyzing trace with hash 50706749, now seen corresponding path program 70 times [2021-08-06 19:30:23,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:23,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693668211] [2021-08-06 19:30:23,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:23,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:23,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:23,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693668211] [2021-08-06 19:30:23,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693668211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:23,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496756691] [2021-08-06 19:30:23,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:30:23,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:23,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:23,720 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:23,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 19:30:25,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:30:25,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:25,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:30:25,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:26,125 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:30:26,127 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:30:26,178 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:30:26,178 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:30:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:26,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496756691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:26,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:26,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:30:26,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702580135] [2021-08-06 19:30:26,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:30:26,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:26,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:30:26,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:30:26,205 INFO L87 Difference]: Start difference. First operand 3627 states and 5991 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:26,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:26,334 INFO L93 Difference]: Finished difference Result 3777 states and 6195 transitions. [2021-08-06 19:30:26,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:30:26,335 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:30:26,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:26,339 INFO L225 Difference]: With dead ends: 3777 [2021-08-06 19:30:26,339 INFO L226 Difference]: Without dead ends: 3773 [2021-08-06 19:30:26,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:30:26,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3773 states. [2021-08-06 19:30:26,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3773 to 3570. [2021-08-06 19:30:26,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3570 states, 3569 states have (on average 1.649761838049874) internal successors, (5888), 3569 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:26,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3570 states to 3570 states and 5888 transitions. [2021-08-06 19:30:26,371 INFO L78 Accepts]: Start accepts. Automaton has 3570 states and 5888 transitions. Word has length 41 [2021-08-06 19:30:26,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:26,371 INFO L470 AbstractCegarLoop]: Abstraction has 3570 states and 5888 transitions. [2021-08-06 19:30:26,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:26,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3570 states and 5888 transitions. [2021-08-06 19:30:26,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:30:26,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:26,373 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:26,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-06 19:30:26,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:26,575 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:26,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:26,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1886790723, now seen corresponding path program 71 times [2021-08-06 19:30:26,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:26,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630192328] [2021-08-06 19:30:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:26,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:26,666 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:26,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:26,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630192328] [2021-08-06 19:30:26,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630192328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:26,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756713838] [2021-08-06 19:30:26,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:30:26,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:26,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:26,668 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:26,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 19:30:28,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-06 19:30:28,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:28,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:30:28,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:29,053 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:30:29,054 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:30:29,075 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:30:29,076 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:30:29,103 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:30:29,104 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:30:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:29,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756713838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:29,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:29,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 15 [2021-08-06 19:30:29,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289025921] [2021-08-06 19:30:29,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:30:29,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:29,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:30:29,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:30:29,130 INFO L87 Difference]: Start difference. First operand 3570 states and 5888 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:29,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:29,320 INFO L93 Difference]: Finished difference Result 4026 states and 6503 transitions. [2021-08-06 19:30:29,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:30:29,321 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:30:29,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:29,325 INFO L225 Difference]: With dead ends: 4026 [2021-08-06 19:30:29,325 INFO L226 Difference]: Without dead ends: 4024 [2021-08-06 19:30:29,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:30:29,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4024 states. [2021-08-06 19:30:29,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4024 to 3540. [2021-08-06 19:30:29,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3540 states, 3539 states have (on average 1.651596496185363) internal successors, (5845), 3539 states have internal predecessors, (5845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:29,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 5845 transitions. [2021-08-06 19:30:29,357 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 5845 transitions. Word has length 41 [2021-08-06 19:30:29,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:29,357 INFO L470 AbstractCegarLoop]: Abstraction has 3540 states and 5845 transitions. [2021-08-06 19:30:29,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:29,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 5845 transitions. [2021-08-06 19:30:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:30:29,359 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:29,359 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:29,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-06 19:30:29,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:29,560 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:29,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:29,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1185050858, now seen corresponding path program 72 times [2021-08-06 19:30:29,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:29,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523598162] [2021-08-06 19:30:29,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:29,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:29,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:29,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523598162] [2021-08-06 19:30:29,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523598162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:29,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287076357] [2021-08-06 19:30:29,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:30:29,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:29,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:29,691 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:29,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 19:30:31,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-06 19:30:31,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:31,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 19:30:31,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:32,229 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:32,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287076357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:32,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:32,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:30:32,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096408308] [2021-08-06 19:30:32,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:30:32,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:32,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:30:32,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:30:32,230 INFO L87 Difference]: Start difference. First operand 3540 states and 5845 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:32,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:32,423 INFO L93 Difference]: Finished difference Result 4170 states and 6763 transitions. [2021-08-06 19:30:32,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:30:32,423 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:30:32,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:32,427 INFO L225 Difference]: With dead ends: 4170 [2021-08-06 19:30:32,428 INFO L226 Difference]: Without dead ends: 4160 [2021-08-06 19:30:32,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:30:32,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4160 states. [2021-08-06 19:30:32,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4160 to 3579. [2021-08-06 19:30:32,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3579 states, 3578 states have (on average 1.649804359977641) internal successors, (5903), 3578 states have internal predecessors, (5903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:32,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3579 states to 3579 states and 5903 transitions. [2021-08-06 19:30:32,461 INFO L78 Accepts]: Start accepts. Automaton has 3579 states and 5903 transitions. Word has length 41 [2021-08-06 19:30:32,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:32,461 INFO L470 AbstractCegarLoop]: Abstraction has 3579 states and 5903 transitions. [2021-08-06 19:30:32,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:32,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3579 states and 5903 transitions. [2021-08-06 19:30:32,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:30:32,464 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:32,464 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:32,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:32,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:32,664 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:32,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:32,665 INFO L82 PathProgramCache]: Analyzing trace with hash -348419345, now seen corresponding path program 36 times [2021-08-06 19:30:32,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:32,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990281121] [2021-08-06 19:30:32,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:32,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:32,758 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 40 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:32,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:32,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990281121] [2021-08-06 19:30:32,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990281121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:32,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582654173] [2021-08-06 19:30:32,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:30:32,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:32,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:32,759 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:32,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 19:30:35,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:30:35,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:35,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:30:35,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:35,288 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:30:35,289 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:30:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:35,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582654173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:35,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:35,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 19:30:35,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631559348] [2021-08-06 19:30:35,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:30:35,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:35,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:30:35,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:30:35,306 INFO L87 Difference]: Start difference. First operand 3579 states and 5903 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:35,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:35,464 INFO L93 Difference]: Finished difference Result 4948 states and 7954 transitions. [2021-08-06 19:30:35,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:30:35,464 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:30:35,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:35,469 INFO L225 Difference]: With dead ends: 4948 [2021-08-06 19:30:35,469 INFO L226 Difference]: Without dead ends: 4948 [2021-08-06 19:30:35,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:30:35,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4948 states. [2021-08-06 19:30:35,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4948 to 3655. [2021-08-06 19:30:35,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3655 states, 3654 states have (on average 1.6562671045429667) internal successors, (6052), 3654 states have internal predecessors, (6052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:35,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3655 states to 3655 states and 6052 transitions. [2021-08-06 19:30:35,517 INFO L78 Accepts]: Start accepts. Automaton has 3655 states and 6052 transitions. Word has length 41 [2021-08-06 19:30:35,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:35,517 INFO L470 AbstractCegarLoop]: Abstraction has 3655 states and 6052 transitions. [2021-08-06 19:30:35,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:35,517 INFO L276 IsEmpty]: Start isEmpty. Operand 3655 states and 6052 transitions. [2021-08-06 19:30:35,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:30:35,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:35,519 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:35,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-06 19:30:35,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-06 19:30:35,720 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:35,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:35,720 INFO L82 PathProgramCache]: Analyzing trace with hash -993498237, now seen corresponding path program 37 times [2021-08-06 19:30:35,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:35,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415613054] [2021-08-06 19:30:35,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:35,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:35,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:35,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415613054] [2021-08-06 19:30:35,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415613054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:35,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893480014] [2021-08-06 19:30:35,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:30:35,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:35,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:35,831 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:35,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 19:30:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:38,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:30:38,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:38,425 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:30:38,426 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:30:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:38,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893480014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:38,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:38,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 19:30:38,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790424036] [2021-08-06 19:30:38,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:30:38,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:38,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:30:38,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:30:38,443 INFO L87 Difference]: Start difference. First operand 3655 states and 6052 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:38,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:38,614 INFO L93 Difference]: Finished difference Result 4556 states and 7327 transitions. [2021-08-06 19:30:38,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:30:38,615 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:30:38,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:38,620 INFO L225 Difference]: With dead ends: 4556 [2021-08-06 19:30:38,620 INFO L226 Difference]: Without dead ends: 4556 [2021-08-06 19:30:38,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:30:38,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4556 states. [2021-08-06 19:30:38,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4556 to 3493. [2021-08-06 19:30:38,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3493 states, 3492 states have (on average 1.647479954180985) internal successors, (5753), 3492 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:38,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3493 states to 3493 states and 5753 transitions. [2021-08-06 19:30:38,660 INFO L78 Accepts]: Start accepts. Automaton has 3493 states and 5753 transitions. Word has length 41 [2021-08-06 19:30:38,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:38,660 INFO L470 AbstractCegarLoop]: Abstraction has 3493 states and 5753 transitions. [2021-08-06 19:30:38,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:38,660 INFO L276 IsEmpty]: Start isEmpty. Operand 3493 states and 5753 transitions. [2021-08-06 19:30:38,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:30:38,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:38,662 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:38,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-08-06 19:30:38,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-06 19:30:38,863 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:38,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:38,863 INFO L82 PathProgramCache]: Analyzing trace with hash 91406359, now seen corresponding path program 73 times [2021-08-06 19:30:38,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:38,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030470501] [2021-08-06 19:30:38,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:38,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:38,962 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:38,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:38,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030470501] [2021-08-06 19:30:38,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030470501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:38,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819920350] [2021-08-06 19:30:38,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:30:38,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:38,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:38,963 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:38,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 19:30:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:41,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:30:41,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:41,455 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:30:41,456 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:30:41,534 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:30:41,535 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:30:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:41,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819920350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:41,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:41,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:30:41,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746304996] [2021-08-06 19:30:41,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:30:41,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:41,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:30:41,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:30:41,561 INFO L87 Difference]: Start difference. First operand 3493 states and 5753 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:41,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:41,681 INFO L93 Difference]: Finished difference Result 3780 states and 6132 transitions. [2021-08-06 19:30:41,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:30:41,681 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:30:41,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:41,685 INFO L225 Difference]: With dead ends: 3780 [2021-08-06 19:30:41,685 INFO L226 Difference]: Without dead ends: 3768 [2021-08-06 19:30:41,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:30:41,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2021-08-06 19:30:41,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 3487. [2021-08-06 19:30:41,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 1.6480206540447504) internal successors, (5745), 3486 states have internal predecessors, (5745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:41,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 5745 transitions. [2021-08-06 19:30:41,713 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 5745 transitions. Word has length 41 [2021-08-06 19:30:41,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:41,713 INFO L470 AbstractCegarLoop]: Abstraction has 3487 states and 5745 transitions. [2021-08-06 19:30:41,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:41,713 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 5745 transitions. [2021-08-06 19:30:41,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:30:41,715 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:41,715 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:41,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:41,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-06 19:30:41,916 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:41,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:41,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1106748266, now seen corresponding path program 74 times [2021-08-06 19:30:41,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:41,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755674363] [2021-08-06 19:30:41,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:41,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:30:42,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:42,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755674363] [2021-08-06 19:30:42,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755674363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:42,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615865148] [2021-08-06 19:30:42,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:30:42,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:42,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:42,009 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:42,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-06 19:30:44,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:30:44,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:44,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 19:30:44,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:30:44,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615865148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:44,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:44,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:30:44,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543700026] [2021-08-06 19:30:44,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:30:44,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:44,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:30:44,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:30:44,556 INFO L87 Difference]: Start difference. First operand 3487 states and 5745 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:44,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:44,799 INFO L93 Difference]: Finished difference Result 4526 states and 7302 transitions. [2021-08-06 19:30:44,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:30:44,799 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:30:44,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:44,804 INFO L225 Difference]: With dead ends: 4526 [2021-08-06 19:30:44,804 INFO L226 Difference]: Without dead ends: 4491 [2021-08-06 19:30:44,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 124.9ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:30:44,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2021-08-06 19:30:44,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 3520. [2021-08-06 19:30:44,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3520 states, 3519 states have (on average 1.6524580846831487) internal successors, (5815), 3519 states have internal predecessors, (5815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:44,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3520 states to 3520 states and 5815 transitions. [2021-08-06 19:30:44,838 INFO L78 Accepts]: Start accepts. Automaton has 3520 states and 5815 transitions. Word has length 41 [2021-08-06 19:30:44,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:44,838 INFO L470 AbstractCegarLoop]: Abstraction has 3520 states and 5815 transitions. [2021-08-06 19:30:44,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:44,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3520 states and 5815 transitions. [2021-08-06 19:30:44,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:30:44,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:44,840 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:44,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-08-06 19:30:45,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:45,043 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:45,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:45,043 INFO L82 PathProgramCache]: Analyzing trace with hash 169708951, now seen corresponding path program 75 times [2021-08-06 19:30:45,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:45,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437141477] [2021-08-06 19:30:45,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:45,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:45,146 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:45,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:45,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437141477] [2021-08-06 19:30:45,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437141477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:45,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074213480] [2021-08-06 19:30:45,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:30:45,147 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:45,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:45,147 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:45,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-06 19:30:47,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-06 19:30:47,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:47,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:30:47,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:47,800 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:30:47,801 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:30:47,883 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:30:47,884 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:30:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:47,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074213480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:47,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:47,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:30:47,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690484505] [2021-08-06 19:30:47,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:30:47,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:47,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:30:47,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:30:47,910 INFO L87 Difference]: Start difference. First operand 3520 states and 5815 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:48,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:48,032 INFO L93 Difference]: Finished difference Result 3974 states and 6410 transitions. [2021-08-06 19:30:48,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:30:48,032 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:30:48,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:48,035 INFO L225 Difference]: With dead ends: 3974 [2021-08-06 19:30:48,035 INFO L226 Difference]: Without dead ends: 3962 [2021-08-06 19:30:48,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:30:48,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3962 states. [2021-08-06 19:30:48,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3962 to 3520. [2021-08-06 19:30:48,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3520 states, 3519 states have (on average 1.6521739130434783) internal successors, (5814), 3519 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:48,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3520 states to 3520 states and 5814 transitions. [2021-08-06 19:30:48,084 INFO L78 Accepts]: Start accepts. Automaton has 3520 states and 5814 transitions. Word has length 41 [2021-08-06 19:30:48,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:48,084 INFO L470 AbstractCegarLoop]: Abstraction has 3520 states and 5814 transitions. [2021-08-06 19:30:48,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:48,084 INFO L276 IsEmpty]: Start isEmpty. Operand 3520 states and 5814 transitions. [2021-08-06 19:30:48,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:30:48,086 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:48,086 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:48,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-08-06 19:30:48,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:48,288 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:48,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:48,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1033351108, now seen corresponding path program 76 times [2021-08-06 19:30:48,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:48,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100886630] [2021-08-06 19:30:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:48,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:48,388 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:48,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:48,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100886630] [2021-08-06 19:30:48,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100886630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:48,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506225604] [2021-08-06 19:30:48,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:30:48,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:48,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:48,389 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:48,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-06 19:30:50,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:30:50,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:50,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 19:30:50,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:50,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506225604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:50,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:50,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:30:50,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356084281] [2021-08-06 19:30:50,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:30:50,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:50,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:30:50,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:30:50,969 INFO L87 Difference]: Start difference. First operand 3520 states and 5814 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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) [2021-08-06 19:30:51,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:51,231 INFO L93 Difference]: Finished difference Result 4634 states and 7411 transitions. [2021-08-06 19:30:51,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:30:51,231 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 41 [2021-08-06 19:30:51,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:51,236 INFO L225 Difference]: With dead ends: 4634 [2021-08-06 19:30:51,236 INFO L226 Difference]: Without dead ends: 4589 [2021-08-06 19:30:51,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 135.9ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:30:51,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4589 states. [2021-08-06 19:30:51,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4589 to 3534. [2021-08-06 19:30:51,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3534 states, 3533 states have (on average 1.6439286725162752) internal successors, (5808), 3533 states have internal predecessors, (5808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:51,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3534 states to 3534 states and 5808 transitions. [2021-08-06 19:30:51,271 INFO L78 Accepts]: Start accepts. Automaton has 3534 states and 5808 transitions. Word has length 41 [2021-08-06 19:30:51,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:51,271 INFO L470 AbstractCegarLoop]: Abstraction has 3534 states and 5808 transitions. [2021-08-06 19:30:51,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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) [2021-08-06 19:30:51,271 INFO L276 IsEmpty]: Start isEmpty. Operand 3534 states and 5808 transitions. [2021-08-06 19:30:51,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:30:51,274 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:51,274 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:51,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-06 19:30:51,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:51,474 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:51,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:51,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1869982621, now seen corresponding path program 38 times [2021-08-06 19:30:51,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:51,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183252003] [2021-08-06 19:30:51,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:51,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:51,574 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 39 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:51,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:51,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183252003] [2021-08-06 19:30:51,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183252003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:51,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742360103] [2021-08-06 19:30:51,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:30:51,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:51,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:51,575 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:51,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-06 19:30:53,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:30:53,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:53,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:30:53,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:54,214 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:30:54,215 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:30:54,231 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:54,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742360103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:54,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:54,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 19:30:54,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513096876] [2021-08-06 19:30:54,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:30:54,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:54,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:30:54,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:30:54,232 INFO L87 Difference]: Start difference. First operand 3534 states and 5808 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:54,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:54,388 INFO L93 Difference]: Finished difference Result 5311 states and 8515 transitions. [2021-08-06 19:30:54,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:30:54,389 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:30:54,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:54,394 INFO L225 Difference]: With dead ends: 5311 [2021-08-06 19:30:54,394 INFO L226 Difference]: Without dead ends: 5311 [2021-08-06 19:30:54,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:30:54,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5311 states. [2021-08-06 19:30:54,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5311 to 3719. [2021-08-06 19:30:54,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3719 states, 3718 states have (on average 1.6543840774610006) internal successors, (6151), 3718 states have internal predecessors, (6151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:54,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3719 states to 3719 states and 6151 transitions. [2021-08-06 19:30:54,432 INFO L78 Accepts]: Start accepts. Automaton has 3719 states and 6151 transitions. Word has length 41 [2021-08-06 19:30:54,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:54,432 INFO L470 AbstractCegarLoop]: Abstraction has 3719 states and 6151 transitions. [2021-08-06 19:30:54,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand 3719 states and 6151 transitions. [2021-08-06 19:30:54,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:30:54,434 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:54,435 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:54,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:54,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-06 19:30:54,635 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:54,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:54,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1224903729, now seen corresponding path program 39 times [2021-08-06 19:30:54,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:54,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863938039] [2021-08-06 19:30:54,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:54,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:54,753 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:54,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:54,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863938039] [2021-08-06 19:30:54,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863938039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:54,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214933316] [2021-08-06 19:30:54,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:30:54,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:54,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:54,759 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:54,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-06 19:30:57,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-06 19:30:57,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:57,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:30:57,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:57,448 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:30:57,448 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:30:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 40 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:57,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214933316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:57,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:57,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 19:30:57,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021470025] [2021-08-06 19:30:57,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:30:57,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:57,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:30:57,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:30:57,466 INFO L87 Difference]: Start difference. First operand 3719 states and 6151 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:57,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:57,658 INFO L93 Difference]: Finished difference Result 5246 states and 8421 transitions. [2021-08-06 19:30:57,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:30:57,659 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:30:57,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:57,663 INFO L225 Difference]: With dead ends: 5246 [2021-08-06 19:30:57,663 INFO L226 Difference]: Without dead ends: 5246 [2021-08-06 19:30:57,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:30:57,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5246 states. [2021-08-06 19:30:57,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5246 to 3734. [2021-08-06 19:30:57,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3734 states, 3733 states have (on average 1.6549691936780069) internal successors, (6178), 3733 states have internal predecessors, (6178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:57,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3734 states to 3734 states and 6178 transitions. [2021-08-06 19:30:57,700 INFO L78 Accepts]: Start accepts. Automaton has 3734 states and 6178 transitions. Word has length 41 [2021-08-06 19:30:57,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:57,700 INFO L470 AbstractCegarLoop]: Abstraction has 3734 states and 6178 transitions. [2021-08-06 19:30:57,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:57,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3734 states and 6178 transitions. [2021-08-06 19:30:57,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:30:57,702 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:57,703 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:57,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-08-06 19:30:57,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:57,905 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:57,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:57,905 INFO L82 PathProgramCache]: Analyzing trace with hash -636685539, now seen corresponding path program 40 times [2021-08-06 19:30:57,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:57,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428115871] [2021-08-06 19:30:57,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:57,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:58,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:58,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428115871] [2021-08-06 19:30:58,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428115871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:58,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849707528] [2021-08-06 19:30:58,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:30:58,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:58,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:58,033 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:58,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-06 19:31:00,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:31:00,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:00,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:31:00,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:00,803 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:31:00,803 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:31:00,820 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:00,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849707528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:00,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:00,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 19:31:00,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994026471] [2021-08-06 19:31:00,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:31:00,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:00,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:31:00,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:31:00,821 INFO L87 Difference]: Start difference. First operand 3734 states and 6178 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:01,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:01,031 INFO L93 Difference]: Finished difference Result 4639 states and 7456 transitions. [2021-08-06 19:31:01,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:31:01,032 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:31:01,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:01,036 INFO L225 Difference]: With dead ends: 4639 [2021-08-06 19:31:01,036 INFO L226 Difference]: Without dead ends: 4639 [2021-08-06 19:31:01,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:31:01,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2021-08-06 19:31:01,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 3670. [2021-08-06 19:31:01,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3670 states, 3669 states have (on average 1.6530389751976016) internal successors, (6065), 3669 states have internal predecessors, (6065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:01,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3670 states to 3670 states and 6065 transitions. [2021-08-06 19:31:01,073 INFO L78 Accepts]: Start accepts. Automaton has 3670 states and 6065 transitions. Word has length 41 [2021-08-06 19:31:01,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:01,073 INFO L470 AbstractCegarLoop]: Abstraction has 3670 states and 6065 transitions. [2021-08-06 19:31:01,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:01,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3670 states and 6065 transitions. [2021-08-06 19:31:01,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:31:01,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:01,075 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:01,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-08-06 19:31:01,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:01,276 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:01,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:01,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1392710397, now seen corresponding path program 77 times [2021-08-06 19:31:01,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:01,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780879146] [2021-08-06 19:31:01,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:01,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:01,397 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 23 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:01,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:01,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780879146] [2021-08-06 19:31:01,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780879146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:01,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118813167] [2021-08-06 19:31:01,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:31:01,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:01,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:01,398 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:01,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-06 19:31:03,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-06 19:31:03,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:03,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:31:03,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:04,010 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:31:04,012 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:31:04,128 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:31:04,129 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:31:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:04,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118813167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:04,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:04,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-08-06 19:31:04,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030718940] [2021-08-06 19:31:04,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:31:04,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:04,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:31:04,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:31:04,157 INFO L87 Difference]: Start difference. First operand 3670 states and 6065 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:04,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:04,354 INFO L93 Difference]: Finished difference Result 4145 states and 6701 transitions. [2021-08-06 19:31:04,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:31:04,354 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:31:04,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:04,359 INFO L225 Difference]: With dead ends: 4145 [2021-08-06 19:31:04,359 INFO L226 Difference]: Without dead ends: 4127 [2021-08-06 19:31:04,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:31:04,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4127 states. [2021-08-06 19:31:04,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4127 to 3664. [2021-08-06 19:31:04,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3664 states, 3663 states have (on average 1.6535626535626535) internal successors, (6057), 3663 states have internal predecessors, (6057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:04,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3664 states to 3664 states and 6057 transitions. [2021-08-06 19:31:04,395 INFO L78 Accepts]: Start accepts. Automaton has 3664 states and 6057 transitions. Word has length 41 [2021-08-06 19:31:04,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:04,395 INFO L470 AbstractCegarLoop]: Abstraction has 3664 states and 6057 transitions. [2021-08-06 19:31:04,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:04,395 INFO L276 IsEmpty]: Start isEmpty. Operand 3664 states and 6057 transitions. [2021-08-06 19:31:04,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:31:04,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:04,398 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:04,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-06 19:31:04,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:04,598 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:04,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:04,598 INFO L82 PathProgramCache]: Analyzing trace with hash -561471722, now seen corresponding path program 78 times [2021-08-06 19:31:04,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:04,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270328870] [2021-08-06 19:31:04,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:04,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:04,705 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:31:04,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:04,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270328870] [2021-08-06 19:31:04,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270328870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:04,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728934586] [2021-08-06 19:31:04,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:31:04,705 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:04,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:04,709 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:04,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-06 19:31:07,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 19:31:07,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:07,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 19:31:07,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:31:07,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728934586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:07,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:07,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:31:07,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037954251] [2021-08-06 19:31:07,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:31:07,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:07,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:31:07,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:31:07,425 INFO L87 Difference]: Start difference. First operand 3664 states and 6057 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:07,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:07,705 INFO L93 Difference]: Finished difference Result 4781 states and 7740 transitions. [2021-08-06 19:31:07,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:31:07,705 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:31:07,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:07,710 INFO L225 Difference]: With dead ends: 4781 [2021-08-06 19:31:07,710 INFO L226 Difference]: Without dead ends: 4736 [2021-08-06 19:31:07,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 135.1ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:31:07,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4736 states. [2021-08-06 19:31:07,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4736 to 3697. [2021-08-06 19:31:07,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3697 states, 3696 states have (on average 1.6577380952380953) internal successors, (6127), 3696 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3697 states to 3697 states and 6127 transitions. [2021-08-06 19:31:07,748 INFO L78 Accepts]: Start accepts. Automaton has 3697 states and 6127 transitions. Word has length 41 [2021-08-06 19:31:07,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:07,748 INFO L470 AbstractCegarLoop]: Abstraction has 3697 states and 6127 transitions. [2021-08-06 19:31:07,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:07,748 INFO L276 IsEmpty]: Start isEmpty. Operand 3697 states and 6127 transitions. [2021-08-06 19:31:07,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:31:07,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:07,750 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:07,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:07,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-06 19:31:07,951 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:07,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:07,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1578627652, now seen corresponding path program 79 times [2021-08-06 19:31:07,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:07,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946636895] [2021-08-06 19:31:07,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:07,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:31:08,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:08,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946636895] [2021-08-06 19:31:08,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946636895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:08,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027579503] [2021-08-06 19:31:08,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:31:08,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:08,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:08,061 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:08,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-06 19:31:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:10,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 19:31:10,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:31:10,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027579503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:10,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:10,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:31:10,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071322752] [2021-08-06 19:31:10,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:31:10,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:10,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:31:10,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:31:10,808 INFO L87 Difference]: Start difference. First operand 3697 states and 6127 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:11,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:11,256 INFO L93 Difference]: Finished difference Result 5908 states and 9474 transitions. [2021-08-06 19:31:11,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 19:31:11,256 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:31:11,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:11,262 INFO L225 Difference]: With dead ends: 5908 [2021-08-06 19:31:11,262 INFO L226 Difference]: Without dead ends: 5813 [2021-08-06 19:31:11,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 247.3ms TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:31:11,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5813 states. [2021-08-06 19:31:11,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5813 to 3775. [2021-08-06 19:31:11,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3775 states, 3774 states have (on average 1.6645468998410176) internal successors, (6282), 3774 states have internal predecessors, (6282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:11,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3775 states to 3775 states and 6282 transitions. [2021-08-06 19:31:11,321 INFO L78 Accepts]: Start accepts. Automaton has 3775 states and 6282 transitions. Word has length 41 [2021-08-06 19:31:11,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:11,321 INFO L470 AbstractCegarLoop]: Abstraction has 3775 states and 6282 transitions. [2021-08-06 19:31:11,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:11,321 INFO L276 IsEmpty]: Start isEmpty. Operand 3775 states and 6282 transitions. [2021-08-06 19:31:11,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:31:11,324 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:11,324 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:11,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-08-06 19:31:11,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-06 19:31:11,524 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:11,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:11,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1510430634, now seen corresponding path program 80 times [2021-08-06 19:31:11,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:11,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087396971] [2021-08-06 19:31:11,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:11,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:11,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:11,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087396971] [2021-08-06 19:31:11,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087396971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:11,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693756593] [2021-08-06 19:31:11,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:31:11,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:11,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:11,631 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:11,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-06 19:31:14,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:31:14,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:14,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 19:31:14,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:14,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693756593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:14,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:14,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:31:14,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704629498] [2021-08-06 19:31:14,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:31:14,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:14,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:31:14,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:31:14,376 INFO L87 Difference]: Start difference. First operand 3775 states and 6282 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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) [2021-08-06 19:31:14,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:14,698 INFO L93 Difference]: Finished difference Result 5568 states and 8829 transitions. [2021-08-06 19:31:14,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:31:14,699 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 41 [2021-08-06 19:31:14,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:14,704 INFO L225 Difference]: With dead ends: 5568 [2021-08-06 19:31:14,704 INFO L226 Difference]: Without dead ends: 5438 [2021-08-06 19:31:14,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 191.8ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:31:14,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5438 states. [2021-08-06 19:31:14,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5438 to 3595. [2021-08-06 19:31:14,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3595 states, 3594 states have (on average 1.6513633834168058) internal successors, (5935), 3594 states have internal predecessors, (5935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:14,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3595 states to 3595 states and 5935 transitions. [2021-08-06 19:31:14,739 INFO L78 Accepts]: Start accepts. Automaton has 3595 states and 5935 transitions. Word has length 41 [2021-08-06 19:31:14,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:14,739 INFO L470 AbstractCegarLoop]: Abstraction has 3595 states and 5935 transitions. [2021-08-06 19:31:14,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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) [2021-08-06 19:31:14,739 INFO L276 IsEmpty]: Start isEmpty. Operand 3595 states and 5935 transitions. [2021-08-06 19:31:14,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:31:14,741 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:14,741 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:14,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2021-08-06 19:31:14,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-06 19:31:14,942 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:14,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:14,942 INFO L82 PathProgramCache]: Analyzing trace with hash -180277524, now seen corresponding path program 81 times [2021-08-06 19:31:14,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:14,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397480589] [2021-08-06 19:31:14,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:14,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:15,023 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:31:15,024 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:31:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:31:15,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:15,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397480589] [2021-08-06 19:31:15,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397480589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:15,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342489361] [2021-08-06 19:31:15,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:31:15,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:15,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:15,031 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:15,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-06 19:31:17,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 19:31:17,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:17,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:31:17,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:18,007 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:31:18,008 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:31:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 41 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:18,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342489361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:18,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:18,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2021-08-06 19:31:18,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920959344] [2021-08-06 19:31:18,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:31:18,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:18,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:31:18,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:31:18,032 INFO L87 Difference]: Start difference. First operand 3595 states and 5935 transitions. Second operand has 16 states, 16 states have (on average 5.4375) internal successors, (87), 15 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:18,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:18,657 INFO L93 Difference]: Finished difference Result 4885 states and 7744 transitions. [2021-08-06 19:31:18,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 19:31:18,657 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.4375) internal successors, (87), 15 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:31:18,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:18,662 INFO L225 Difference]: With dead ends: 4885 [2021-08-06 19:31:18,662 INFO L226 Difference]: Without dead ends: 4852 [2021-08-06 19:31:18,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 305.7ms TimeCoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:31:18,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4852 states. [2021-08-06 19:31:18,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4852 to 3765. [2021-08-06 19:31:18,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3765 states, 3764 states have (on average 1.6485122210414453) internal successors, (6205), 3764 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:18,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3765 states to 3765 states and 6205 transitions. [2021-08-06 19:31:18,698 INFO L78 Accepts]: Start accepts. Automaton has 3765 states and 6205 transitions. Word has length 44 [2021-08-06 19:31:18,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:18,699 INFO L470 AbstractCegarLoop]: Abstraction has 3765 states and 6205 transitions. [2021-08-06 19:31:18,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.4375) internal successors, (87), 15 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:18,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3765 states and 6205 transitions. [2021-08-06 19:31:18,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:31:18,701 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:18,701 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:18,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-08-06 19:31:18,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-06 19:31:18,902 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:18,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:18,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1501489400, now seen corresponding path program 82 times [2021-08-06 19:31:18,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:18,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218638589] [2021-08-06 19:31:18,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:18,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:19,002 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:31:19,003 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:31:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:31:19,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:19,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218638589] [2021-08-06 19:31:19,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218638589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:19,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154926604] [2021-08-06 19:31:19,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:31:19,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:19,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:19,009 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:19,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-06 19:31:21,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:31:21,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:21,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:31:21,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:21,967 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:31:21,968 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:31:21,991 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 41 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:21,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154926604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:21,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:21,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 16 [2021-08-06 19:31:21,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005665040] [2021-08-06 19:31:21,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:31:21,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:21,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:31:21,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:31:21,992 INFO L87 Difference]: Start difference. First operand 3765 states and 6205 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 16 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:22,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:22,758 INFO L93 Difference]: Finished difference Result 4976 states and 7932 transitions. [2021-08-06 19:31:22,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 19:31:22,758 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 16 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:31:22,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:22,763 INFO L225 Difference]: With dead ends: 4976 [2021-08-06 19:31:22,763 INFO L226 Difference]: Without dead ends: 4947 [2021-08-06 19:31:22,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 347.7ms TimeCoverageRelationStatistics Valid=286, Invalid=1120, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:31:22,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4947 states. [2021-08-06 19:31:22,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4947 to 3885. [2021-08-06 19:31:22,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3885 states, 3884 states have (on average 1.649330587023687) internal successors, (6406), 3884 states have internal predecessors, (6406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:22,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 6406 transitions. [2021-08-06 19:31:22,797 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 6406 transitions. Word has length 44 [2021-08-06 19:31:22,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:22,797 INFO L470 AbstractCegarLoop]: Abstraction has 3885 states and 6406 transitions. [2021-08-06 19:31:22,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 16 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:22,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 6406 transitions. [2021-08-06 19:31:22,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:31:22,800 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:22,800 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:22,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2021-08-06 19:31:23,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-08-06 19:31:23,001 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:23,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:23,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1650780524, now seen corresponding path program 83 times [2021-08-06 19:31:23,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:23,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956685216] [2021-08-06 19:31:23,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:23,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:23,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:23,079 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:31:23,080 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:31:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:31:23,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:23,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956685216] [2021-08-06 19:31:23,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956685216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:23,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419043433] [2021-08-06 19:31:23,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:31:23,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:23,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:23,087 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:23,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-06 19:31:25,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-06 19:31:25,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:25,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:31:25,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:26,061 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:31:26,061 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:31:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 41 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:26,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419043433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:26,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:26,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12] total 18 [2021-08-06 19:31:26,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295657377] [2021-08-06 19:31:26,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:31:26,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:26,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:31:26,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:31:26,085 INFO L87 Difference]: Start difference. First operand 3885 states and 6406 transitions. Second operand has 19 states, 19 states have (on average 4.578947368421052) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:26,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:26,917 INFO L93 Difference]: Finished difference Result 5471 states and 8861 transitions. [2021-08-06 19:31:26,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 19:31:26,918 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.578947368421052) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:31:26,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:26,924 INFO L225 Difference]: With dead ends: 5471 [2021-08-06 19:31:26,924 INFO L226 Difference]: Without dead ends: 5448 [2021-08-06 19:31:26,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 396.5ms TimeCoverageRelationStatistics Valid=412, Invalid=1394, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 19:31:26,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5448 states. [2021-08-06 19:31:26,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5448 to 4059. [2021-08-06 19:31:26,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4059 states, 4058 states have (on average 1.6569738787580088) internal successors, (6724), 4058 states have internal predecessors, (6724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:26,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4059 states to 4059 states and 6724 transitions. [2021-08-06 19:31:26,977 INFO L78 Accepts]: Start accepts. Automaton has 4059 states and 6724 transitions. Word has length 44 [2021-08-06 19:31:26,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:26,977 INFO L470 AbstractCegarLoop]: Abstraction has 4059 states and 6724 transitions. [2021-08-06 19:31:26,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.578947368421052) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:26,977 INFO L276 IsEmpty]: Start isEmpty. Operand 4059 states and 6724 transitions. [2021-08-06 19:31:26,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:31:26,980 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:26,980 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:27,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2021-08-06 19:31:27,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:27,180 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:27,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:27,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1464159368, now seen corresponding path program 84 times [2021-08-06 19:31:27,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:27,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26772579] [2021-08-06 19:31:27,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:27,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:27,259 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:31:27,260 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:31:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:31:27,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:27,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26772579] [2021-08-06 19:31:27,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26772579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:27,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175102281] [2021-08-06 19:31:27,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:31:27,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:27,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:27,266 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:27,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-06 19:31:29,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-06 19:31:29,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:29,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:31:29,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:30,441 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 95.0 percent of original size [2021-08-06 19:31:30,443 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 95.0 percent of original size [2021-08-06 19:31:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:30,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175102281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:30,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:30,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12] total 18 [2021-08-06 19:31:30,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312395987] [2021-08-06 19:31:30,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:31:30,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:30,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:31:30,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:31:30,499 INFO L87 Difference]: Start difference. First operand 4059 states and 6724 transitions. Second operand has 19 states, 19 states have (on average 4.578947368421052) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:31,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:31,219 INFO L93 Difference]: Finished difference Result 5002 states and 8019 transitions. [2021-08-06 19:31:31,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:31:31,220 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.578947368421052) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:31:31,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:31,225 INFO L225 Difference]: With dead ends: 5002 [2021-08-06 19:31:31,225 INFO L226 Difference]: Without dead ends: 4971 [2021-08-06 19:31:31,226 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 284.8ms TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:31:31,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4971 states. [2021-08-06 19:31:31,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4971 to 4109. [2021-08-06 19:31:31,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4109 states, 4108 states have (on average 1.6557935735150926) internal successors, (6802), 4108 states have internal predecessors, (6802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:31,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4109 states to 4109 states and 6802 transitions. [2021-08-06 19:31:31,263 INFO L78 Accepts]: Start accepts. Automaton has 4109 states and 6802 transitions. Word has length 44 [2021-08-06 19:31:31,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:31,263 INFO L470 AbstractCegarLoop]: Abstraction has 4109 states and 6802 transitions. [2021-08-06 19:31:31,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.578947368421052) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:31,263 INFO L276 IsEmpty]: Start isEmpty. Operand 4109 states and 6802 transitions. [2021-08-06 19:31:31,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:31:31,266 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:31,266 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:31,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2021-08-06 19:31:31,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-06 19:31:31,466 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:31,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:31,466 INFO L82 PathProgramCache]: Analyzing trace with hash -479018004, now seen corresponding path program 85 times [2021-08-06 19:31:31,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:31,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875146451] [2021-08-06 19:31:31,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:31,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:31,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:31,542 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:31:31,543 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:31:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:31,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:31,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875146451] [2021-08-06 19:31:31,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875146451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:31,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409885170] [2021-08-06 19:31:31,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:31:31,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:31,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:31,549 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:31,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-06 19:31:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:34,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:31:34,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:34,708 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:31:34,708 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:31:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 41 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:34,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409885170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:34,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:34,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 19 [2021-08-06 19:31:34,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354445319] [2021-08-06 19:31:34,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 19:31:34,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:34,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 19:31:34,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:31:34,731 INFO L87 Difference]: Start difference. First operand 4109 states and 6802 transitions. Second operand has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:35,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:35,637 INFO L93 Difference]: Finished difference Result 5299 states and 8577 transitions. [2021-08-06 19:31:35,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 19:31:35,637 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:31:35,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:35,643 INFO L225 Difference]: With dead ends: 5299 [2021-08-06 19:31:35,643 INFO L226 Difference]: Without dead ends: 5270 [2021-08-06 19:31:35,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 503.5ms TimeCoverageRelationStatistics Valid=457, Invalid=1705, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 19:31:35,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5270 states. [2021-08-06 19:31:35,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5270 to 4436. [2021-08-06 19:31:35,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4436 states, 4435 states have (on average 1.6556933483652763) internal successors, (7343), 4435 states have internal predecessors, (7343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:35,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4436 states to 4436 states and 7343 transitions. [2021-08-06 19:31:35,682 INFO L78 Accepts]: Start accepts. Automaton has 4436 states and 7343 transitions. Word has length 44 [2021-08-06 19:31:35,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:35,683 INFO L470 AbstractCegarLoop]: Abstraction has 4436 states and 7343 transitions. [2021-08-06 19:31:35,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:35,683 INFO L276 IsEmpty]: Start isEmpty. Operand 4436 states and 7343 transitions. [2021-08-06 19:31:35,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:31:35,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:35,686 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:35,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:35,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:35,887 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:35,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:35,887 INFO L82 PathProgramCache]: Analyzing trace with hash 2136032904, now seen corresponding path program 41 times [2021-08-06 19:31:35,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:35,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000942208] [2021-08-06 19:31:35,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:35,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 35 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:36,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:36,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000942208] [2021-08-06 19:31:36,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000942208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:36,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768535466] [2021-08-06 19:31:36,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:31:36,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:36,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:36,053 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:36,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-06 19:31:38,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 19:31:38,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:38,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:31:38,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:39,166 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:31:39,167 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:31:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 51 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:39,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768535466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:39,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:39,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-08-06 19:31:39,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593810254] [2021-08-06 19:31:39,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:31:39,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:39,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:31:39,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:31:39,185 INFO L87 Difference]: Start difference. First operand 4436 states and 7343 transitions. Second operand has 24 states, 24 states have (on average 3.125) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:39,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:39,860 INFO L93 Difference]: Finished difference Result 7223 states and 11739 transitions. [2021-08-06 19:31:39,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 19:31:39,860 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:31:39,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:39,867 INFO L225 Difference]: With dead ends: 7223 [2021-08-06 19:31:39,867 INFO L226 Difference]: Without dead ends: 7223 [2021-08-06 19:31:39,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 329.1ms TimeCoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:31:39,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7223 states. [2021-08-06 19:31:39,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7223 to 5233. [2021-08-06 19:31:39,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5233 states, 5232 states have (on average 1.6722094801223242) internal successors, (8749), 5232 states have internal predecessors, (8749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:39,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 8749 transitions. [2021-08-06 19:31:39,914 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 8749 transitions. Word has length 47 [2021-08-06 19:31:39,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:39,914 INFO L470 AbstractCegarLoop]: Abstraction has 5233 states and 8749 transitions. [2021-08-06 19:31:39,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:39,914 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 8749 transitions. [2021-08-06 19:31:39,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:31:39,918 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:39,918 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:39,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-06 19:31:40,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:40,118 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:40,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:40,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2117053597, now seen corresponding path program 86 times [2021-08-06 19:31:40,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:40,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864294861] [2021-08-06 19:31:40,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:40,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:40,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:40,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:40,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864294861] [2021-08-06 19:31:40,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864294861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:40,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573244268] [2021-08-06 19:31:40,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:31:40,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:40,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:40,317 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:40,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-06 19:31:43,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:31:43,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:43,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:31:43,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:43,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573244268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:43,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:43,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-08-06 19:31:43,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943769873] [2021-08-06 19:31:43,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:31:43,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:43,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:31:43,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:31:43,345 INFO L87 Difference]: Start difference. First operand 5233 states and 8749 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:44,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:44,296 INFO L93 Difference]: Finished difference Result 7178 states and 11172 transitions. [2021-08-06 19:31:44,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 19:31:44,297 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:31:44,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:44,303 INFO L225 Difference]: With dead ends: 7178 [2021-08-06 19:31:44,303 INFO L226 Difference]: Without dead ends: 7110 [2021-08-06 19:31:44,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 631.5ms TimeCoverageRelationStatistics Valid=334, Invalid=2116, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 19:31:44,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7110 states. [2021-08-06 19:31:44,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7110 to 4237. [2021-08-06 19:31:44,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4237 states, 4236 states have (on average 1.6581680830972616) internal successors, (7024), 4236 states have internal predecessors, (7024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:44,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4237 states to 4237 states and 7024 transitions. [2021-08-06 19:31:44,348 INFO L78 Accepts]: Start accepts. Automaton has 4237 states and 7024 transitions. Word has length 47 [2021-08-06 19:31:44,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:44,349 INFO L470 AbstractCegarLoop]: Abstraction has 4237 states and 7024 transitions. [2021-08-06 19:31:44,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:44,349 INFO L276 IsEmpty]: Start isEmpty. Operand 4237 states and 7024 transitions. [2021-08-06 19:31:44,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:31:44,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:44,352 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:44,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-08-06 19:31:44,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:44,552 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:44,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:44,553 INFO L82 PathProgramCache]: Analyzing trace with hash 264419421, now seen corresponding path program 42 times [2021-08-06 19:31:44,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:44,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016534226] [2021-08-06 19:31:44,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:44,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:44,754 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:31:44,757 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:31:44,781 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:31:44,782 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:31:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 17 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:44,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:44,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016534226] [2021-08-06 19:31:44,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016534226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:44,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031079505] [2021-08-06 19:31:44,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:31:44,788 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:44,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:44,789 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:44,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-06 19:31:47,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:31:47,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:47,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:31:47,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 17 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:47,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031079505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:47,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:47,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-08-06 19:31:47,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59630899] [2021-08-06 19:31:47,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 19:31:47,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:47,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 19:31:47,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:31:47,957 INFO L87 Difference]: Start difference. First operand 4237 states and 7024 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:48,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:48,575 INFO L93 Difference]: Finished difference Result 4447 states and 7274 transitions. [2021-08-06 19:31:48,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:31:48,575 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:31:48,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:48,579 INFO L225 Difference]: With dead ends: 4447 [2021-08-06 19:31:48,579 INFO L226 Difference]: Without dead ends: 4332 [2021-08-06 19:31:48,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 289.5ms TimeCoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:31:48,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4332 states. [2021-08-06 19:31:48,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4332 to 4224. [2021-08-06 19:31:48,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4224 states, 4223 states have (on average 1.6571157944589154) internal successors, (6998), 4223 states have internal predecessors, (6998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:48,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4224 states to 4224 states and 6998 transitions. [2021-08-06 19:31:48,617 INFO L78 Accepts]: Start accepts. Automaton has 4224 states and 6998 transitions. Word has length 47 [2021-08-06 19:31:48,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:48,617 INFO L470 AbstractCegarLoop]: Abstraction has 4224 states and 6998 transitions. [2021-08-06 19:31:48,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:48,617 INFO L276 IsEmpty]: Start isEmpty. Operand 4224 states and 6998 transitions. [2021-08-06 19:31:48,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:31:48,620 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:48,620 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:48,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:48,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:48,821 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:48,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:48,821 INFO L82 PathProgramCache]: Analyzing trace with hash -52080024, now seen corresponding path program 87 times [2021-08-06 19:31:48,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:48,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014154957] [2021-08-06 19:31:48,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:48,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:48,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:48,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014154957] [2021-08-06 19:31:48,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014154957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:48,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959953642] [2021-08-06 19:31:48,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:31:48,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:48,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:48,963 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:48,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-06 19:31:51,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 19:31:51,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:51,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:31:51,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:52,101 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:31:52,102 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:31:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:52,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959953642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:52,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:52,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:31:52,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016944463] [2021-08-06 19:31:52,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:31:52,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:52,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:31:52,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:31:52,126 INFO L87 Difference]: Start difference. First operand 4224 states and 6998 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:52,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:52,258 INFO L93 Difference]: Finished difference Result 5820 states and 9387 transitions. [2021-08-06 19:31:52,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:31:52,259 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:31:52,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:52,264 INFO L225 Difference]: With dead ends: 5820 [2021-08-06 19:31:52,264 INFO L226 Difference]: Without dead ends: 5820 [2021-08-06 19:31:52,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:31:52,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5820 states. [2021-08-06 19:31:52,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5820 to 4626. [2021-08-06 19:31:52,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4626 states, 4625 states have (on average 1.6724324324324324) internal successors, (7735), 4625 states have internal predecessors, (7735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:52,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4626 states to 4626 states and 7735 transitions. [2021-08-06 19:31:52,308 INFO L78 Accepts]: Start accepts. Automaton has 4626 states and 7735 transitions. Word has length 47 [2021-08-06 19:31:52,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:52,308 INFO L470 AbstractCegarLoop]: Abstraction has 4626 states and 7735 transitions. [2021-08-06 19:31:52,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:52,308 INFO L276 IsEmpty]: Start isEmpty. Operand 4626 states and 7735 transitions. [2021-08-06 19:31:52,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:31:52,311 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:52,312 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:52,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-08-06 19:31:52,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-06 19:31:52,512 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:52,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:52,512 INFO L82 PathProgramCache]: Analyzing trace with hash 784551489, now seen corresponding path program 43 times [2021-08-06 19:31:52,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:52,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901487224] [2021-08-06 19:31:52,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:52,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:52,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:52,639 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:31:52,640 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:31:52,655 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:31:52,657 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:31:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:52,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:52,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901487224] [2021-08-06 19:31:52,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901487224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:52,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416342742] [2021-08-06 19:31:52,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:31:52,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:52,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:52,692 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:52,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-06 19:31:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:55,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:31:55,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:55,893 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:55,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416342742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:55,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:55,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 15 [2021-08-06 19:31:55,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827696348] [2021-08-06 19:31:55,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:31:55,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:55,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:31:55,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:31:55,894 INFO L87 Difference]: Start difference. First operand 4626 states and 7735 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:56,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:56,275 INFO L93 Difference]: Finished difference Result 4939 states and 8155 transitions. [2021-08-06 19:31:56,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:31:56,276 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:31:56,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:56,280 INFO L225 Difference]: With dead ends: 4939 [2021-08-06 19:31:56,280 INFO L226 Difference]: Without dead ends: 4939 [2021-08-06 19:31:56,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 252.1ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:31:56,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4939 states. [2021-08-06 19:31:56,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4939 to 4584. [2021-08-06 19:31:56,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4584 states, 4583 states have (on average 1.6746672485271656) internal successors, (7675), 4583 states have internal predecessors, (7675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:56,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4584 states to 4584 states and 7675 transitions. [2021-08-06 19:31:56,330 INFO L78 Accepts]: Start accepts. Automaton has 4584 states and 7675 transitions. Word has length 47 [2021-08-06 19:31:56,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:56,330 INFO L470 AbstractCegarLoop]: Abstraction has 4584 states and 7675 transitions. [2021-08-06 19:31:56,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:56,330 INFO L276 IsEmpty]: Start isEmpty. Operand 4584 states and 7675 transitions. [2021-08-06 19:31:56,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:31:56,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:56,333 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:56,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2021-08-06 19:31:56,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-06 19:31:56,534 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:56,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:56,534 INFO L82 PathProgramCache]: Analyzing trace with hash -818378174, now seen corresponding path program 88 times [2021-08-06 19:31:56,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:56,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634598874] [2021-08-06 19:31:56,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:56,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:56,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:56,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634598874] [2021-08-06 19:31:56,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634598874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:56,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663178396] [2021-08-06 19:31:56,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:31:56,640 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:56,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:56,641 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:56,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-06 19:31:59,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:31:59,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:59,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:31:59,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:59,750 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:31:59,752 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:31:59,773 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:31:59,773 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:31:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:59,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663178396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:59,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:59,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:31:59,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185081723] [2021-08-06 19:31:59,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:31:59,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:59,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:31:59,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:31:59,800 INFO L87 Difference]: Start difference. First operand 4584 states and 7675 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:59,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:59,940 INFO L93 Difference]: Finished difference Result 5747 states and 9258 transitions. [2021-08-06 19:31:59,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:31:59,940 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:31:59,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:59,946 INFO L225 Difference]: With dead ends: 5747 [2021-08-06 19:31:59,946 INFO L226 Difference]: Without dead ends: 5745 [2021-08-06 19:31:59,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:31:59,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5745 states. [2021-08-06 19:31:59,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5745 to 4580. [2021-08-06 19:31:59,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4580 states, 4579 states have (on average 1.6743830530683554) internal successors, (7667), 4579 states have internal predecessors, (7667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:59,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4580 states to 4580 states and 7667 transitions. [2021-08-06 19:31:59,996 INFO L78 Accepts]: Start accepts. Automaton has 4580 states and 7667 transitions. Word has length 47 [2021-08-06 19:31:59,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:59,996 INFO L470 AbstractCegarLoop]: Abstraction has 4580 states and 7667 transitions. [2021-08-06 19:31:59,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:59,996 INFO L276 IsEmpty]: Start isEmpty. Operand 4580 states and 7667 transitions. [2021-08-06 19:31:59,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:31:59,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:00,000 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:00,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2021-08-06 19:32:00,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-06 19:32:00,200 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:00,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:00,200 INFO L82 PathProgramCache]: Analyzing trace with hash -26242008, now seen corresponding path program 89 times [2021-08-06 19:32:00,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:00,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696649781] [2021-08-06 19:32:00,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:00,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:00,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:00,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:00,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696649781] [2021-08-06 19:32:00,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696649781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:00,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605623815] [2021-08-06 19:32:00,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:32:00,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:00,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:00,342 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:00,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-06 19:32:03,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:32:03,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:03,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:32:03,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:03,448 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:32:03,450 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:32:03,500 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:32:03,500 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:32:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:03,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605623815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:03,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:03,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 13 [2021-08-06 19:32:03,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498676052] [2021-08-06 19:32:03,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:32:03,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:03,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:32:03,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:32:03,527 INFO L87 Difference]: Start difference. First operand 4580 states and 7667 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:03,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:03,689 INFO L93 Difference]: Finished difference Result 5854 states and 9424 transitions. [2021-08-06 19:32:03,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:32:03,689 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:32:03,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:03,695 INFO L225 Difference]: With dead ends: 5854 [2021-08-06 19:32:03,696 INFO L226 Difference]: Without dead ends: 5852 [2021-08-06 19:32:03,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:03,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5852 states. [2021-08-06 19:32:03,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5852 to 4580. [2021-08-06 19:32:03,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4580 states, 4579 states have (on average 1.674164664773968) internal successors, (7666), 4579 states have internal predecessors, (7666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:03,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4580 states to 4580 states and 7666 transitions. [2021-08-06 19:32:03,748 INFO L78 Accepts]: Start accepts. Automaton has 4580 states and 7666 transitions. Word has length 47 [2021-08-06 19:32:03,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:03,748 INFO L470 AbstractCegarLoop]: Abstraction has 4580 states and 7666 transitions. [2021-08-06 19:32:03,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:03,748 INFO L276 IsEmpty]: Start isEmpty. Operand 4580 states and 7666 transitions. [2021-08-06 19:32:03,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:32:03,752 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:03,752 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:03,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2021-08-06 19:32:03,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-08-06 19:32:03,953 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:03,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:03,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1951955074, now seen corresponding path program 90 times [2021-08-06 19:32:03,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:03,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783177967] [2021-08-06 19:32:03,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:03,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:04,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:04,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783177967] [2021-08-06 19:32:04,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783177967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:04,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858887313] [2021-08-06 19:32:04,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:32:04,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:04,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:04,068 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:04,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-06 19:32:06,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:32:06,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:06,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:32:06,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:07,191 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:32:07,192 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:32:07,272 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:32:07,272 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:32:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:07,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858887313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:07,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:07,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 19:32:07,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372281120] [2021-08-06 19:32:07,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:32:07,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:07,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:32:07,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:32:07,299 INFO L87 Difference]: Start difference. First operand 4580 states and 7666 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:07,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:07,440 INFO L93 Difference]: Finished difference Result 5748 states and 9255 transitions. [2021-08-06 19:32:07,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:32:07,440 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:32:07,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:07,445 INFO L225 Difference]: With dead ends: 5748 [2021-08-06 19:32:07,445 INFO L226 Difference]: Without dead ends: 5732 [2021-08-06 19:32:07,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:32:07,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5732 states. [2021-08-06 19:32:07,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5732 to 4629. [2021-08-06 19:32:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4628 states have (on average 1.6763180639585133) internal successors, (7758), 4628 states have internal predecessors, (7758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 7758 transitions. [2021-08-06 19:32:07,488 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 7758 transitions. Word has length 47 [2021-08-06 19:32:07,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:07,489 INFO L470 AbstractCegarLoop]: Abstraction has 4629 states and 7758 transitions. [2021-08-06 19:32:07,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:07,489 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 7758 transitions. [2021-08-06 19:32:07,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:32:07,492 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:07,492 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:07,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:07,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:07,693 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:07,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:07,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1120010776, now seen corresponding path program 91 times [2021-08-06 19:32:07,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:07,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745835552] [2021-08-06 19:32:07,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:07,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:07,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:07,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745835552] [2021-08-06 19:32:07,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745835552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:07,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784768739] [2021-08-06 19:32:07,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:32:07,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:07,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:07,813 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:07,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-06 19:32:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:10,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:32:10,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:10,998 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:32:10,999 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:32:11,109 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:32:11,109 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:32:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:11,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784768739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:11,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:11,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 19:32:11,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164690464] [2021-08-06 19:32:11,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:32:11,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:11,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:32:11,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:32:11,136 INFO L87 Difference]: Start difference. First operand 4629 states and 7758 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:11,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:11,297 INFO L93 Difference]: Finished difference Result 5798 states and 9318 transitions. [2021-08-06 19:32:11,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:32:11,297 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:32:11,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:11,303 INFO L225 Difference]: With dead ends: 5798 [2021-08-06 19:32:11,303 INFO L226 Difference]: Without dead ends: 5770 [2021-08-06 19:32:11,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:32:11,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5770 states. [2021-08-06 19:32:11,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5770 to 4629. [2021-08-06 19:32:11,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4628 states have (on average 1.675885911840968) internal successors, (7756), 4628 states have internal predecessors, (7756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:11,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 7756 transitions. [2021-08-06 19:32:11,348 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 7756 transitions. Word has length 47 [2021-08-06 19:32:11,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:11,348 INFO L470 AbstractCegarLoop]: Abstraction has 4629 states and 7756 transitions. [2021-08-06 19:32:11,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:11,348 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 7756 transitions. [2021-08-06 19:32:11,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:32:11,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:11,352 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:11,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2021-08-06 19:32:11,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-08-06 19:32:11,552 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:11,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:11,552 INFO L82 PathProgramCache]: Analyzing trace with hash -891504958, now seen corresponding path program 92 times [2021-08-06 19:32:11,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:11,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991162201] [2021-08-06 19:32:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:11,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:11,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:11,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991162201] [2021-08-06 19:32:11,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991162201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:11,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348458296] [2021-08-06 19:32:11,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:32:11,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:11,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:11,685 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:11,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-06 19:32:14,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:32:14,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:14,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:32:14,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:14,835 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:32:14,836 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:32:14,986 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:32:14,987 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:32:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:15,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348458296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:15,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:15,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:32:15,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162014919] [2021-08-06 19:32:15,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:32:15,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:15,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:32:15,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:32:15,013 INFO L87 Difference]: Start difference. First operand 4629 states and 7756 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:15,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:15,191 INFO L93 Difference]: Finished difference Result 5872 states and 9415 transitions. [2021-08-06 19:32:15,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:32:15,192 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:32:15,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:15,197 INFO L225 Difference]: With dead ends: 5872 [2021-08-06 19:32:15,197 INFO L226 Difference]: Without dead ends: 5832 [2021-08-06 19:32:15,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:32:15,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5832 states. [2021-08-06 19:32:15,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5832 to 4637. [2021-08-06 19:32:15,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 4636 states have (on average 1.6747195858498707) internal successors, (7764), 4636 states have internal predecessors, (7764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:15,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 7764 transitions. [2021-08-06 19:32:15,247 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 7764 transitions. Word has length 47 [2021-08-06 19:32:15,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:15,247 INFO L470 AbstractCegarLoop]: Abstraction has 4637 states and 7764 transitions. [2021-08-06 19:32:15,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:15,247 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 7764 transitions. [2021-08-06 19:32:15,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:32:15,250 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:15,250 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:15,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2021-08-06 19:32:15,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:15,453 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:15,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:15,453 INFO L82 PathProgramCache]: Analyzing trace with hash -997845080, now seen corresponding path program 93 times [2021-08-06 19:32:15,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:15,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390507289] [2021-08-06 19:32:15,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:15,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:15,612 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:15,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:15,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390507289] [2021-08-06 19:32:15,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390507289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:15,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673424389] [2021-08-06 19:32:15,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:32:15,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:15,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:15,614 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:15,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-06 19:32:18,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 19:32:18,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:18,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:32:18,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:18,846 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:32:18,847 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:32:19,016 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:32:19,016 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:32:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:19,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673424389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:19,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:19,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:32:19,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776994023] [2021-08-06 19:32:19,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:32:19,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:19,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:32:19,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:19,042 INFO L87 Difference]: Start difference. First operand 4637 states and 7764 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:19,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:19,241 INFO L93 Difference]: Finished difference Result 5926 states and 9475 transitions. [2021-08-06 19:32:19,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:32:19,241 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:32:19,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:19,247 INFO L225 Difference]: With dead ends: 5926 [2021-08-06 19:32:19,247 INFO L226 Difference]: Without dead ends: 5874 [2021-08-06 19:32:19,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:32:19,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5874 states. [2021-08-06 19:32:19,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5874 to 4476. [2021-08-06 19:32:19,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4476 states, 4475 states have (on average 1.6627932960893854) internal successors, (7441), 4475 states have internal predecessors, (7441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:19,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4476 states to 4476 states and 7441 transitions. [2021-08-06 19:32:19,297 INFO L78 Accepts]: Start accepts. Automaton has 4476 states and 7441 transitions. Word has length 47 [2021-08-06 19:32:19,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:19,297 INFO L470 AbstractCegarLoop]: Abstraction has 4476 states and 7441 transitions. [2021-08-06 19:32:19,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:19,297 INFO L276 IsEmpty]: Start isEmpty. Operand 4476 states and 7441 transitions. [2021-08-06 19:32:19,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:32:19,301 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:19,301 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:19,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2021-08-06 19:32:19,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:19,502 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:19,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:19,502 INFO L82 PathProgramCache]: Analyzing trace with hash 709444866, now seen corresponding path program 94 times [2021-08-06 19:32:19,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:19,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136401685] [2021-08-06 19:32:19,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:19,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:19,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:19,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136401685] [2021-08-06 19:32:19,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136401685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:19,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763508470] [2021-08-06 19:32:19,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:32:19,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:19,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:19,651 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:19,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-06 19:32:22,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:32:22,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:22,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:32:22,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:22,809 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:32:22,810 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:32:23,006 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:32:23,006 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:32:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:23,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763508470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:23,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:23,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 19:32:23,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305936366] [2021-08-06 19:32:23,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:32:23,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:23,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:32:23,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:32:23,032 INFO L87 Difference]: Start difference. First operand 4476 states and 7441 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:23,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:23,252 INFO L93 Difference]: Finished difference Result 5557 states and 8889 transitions. [2021-08-06 19:32:23,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:32:23,252 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:32:23,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:23,257 INFO L225 Difference]: With dead ends: 5557 [2021-08-06 19:32:23,257 INFO L226 Difference]: Without dead ends: 5493 [2021-08-06 19:32:23,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 147.8ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:32:23,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5493 states. [2021-08-06 19:32:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5493 to 4482. [2021-08-06 19:32:23,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4482 states, 4481 states have (on average 1.6616826601205088) internal successors, (7446), 4481 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:23,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4482 states to 4482 states and 7446 transitions. [2021-08-06 19:32:23,296 INFO L78 Accepts]: Start accepts. Automaton has 4482 states and 7446 transitions. Word has length 47 [2021-08-06 19:32:23,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:23,297 INFO L470 AbstractCegarLoop]: Abstraction has 4482 states and 7446 transitions. [2021-08-06 19:32:23,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:23,297 INFO L276 IsEmpty]: Start isEmpty. Operand 4482 states and 7446 transitions. [2021-08-06 19:32:23,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:32:23,300 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:23,300 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:23,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2021-08-06 19:32:23,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:23,500 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:23,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:23,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1697998307, now seen corresponding path program 44 times [2021-08-06 19:32:23,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:23,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160963736] [2021-08-06 19:32:23,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:23,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:23,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:23,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160963736] [2021-08-06 19:32:23,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160963736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:23,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66475885] [2021-08-06 19:32:23,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:32:23,610 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:23,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:23,611 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:23,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-06 19:32:26,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:32:26,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:26,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 19:32:26,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:27,003 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:27,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66475885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:27,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:27,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-06 19:32:27,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476780968] [2021-08-06 19:32:27,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:32:27,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:27,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:32:27,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:32:27,004 INFO L87 Difference]: Start difference. First operand 4482 states and 7446 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:27,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:27,348 INFO L93 Difference]: Finished difference Result 5326 states and 8639 transitions. [2021-08-06 19:32:27,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:32:27,348 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:32:27,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:27,353 INFO L225 Difference]: With dead ends: 5326 [2021-08-06 19:32:27,353 INFO L226 Difference]: Without dead ends: 5311 [2021-08-06 19:32:27,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 132.1ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:32:27,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5311 states. [2021-08-06 19:32:27,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5311 to 4525. [2021-08-06 19:32:27,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4525 states, 4524 states have (on average 1.659814323607427) internal successors, (7509), 4524 states have internal predecessors, (7509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:27,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4525 states to 4525 states and 7509 transitions. [2021-08-06 19:32:27,392 INFO L78 Accepts]: Start accepts. Automaton has 4525 states and 7509 transitions. Word has length 47 [2021-08-06 19:32:27,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:27,392 INFO L470 AbstractCegarLoop]: Abstraction has 4525 states and 7509 transitions. [2021-08-06 19:32:27,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:27,393 INFO L276 IsEmpty]: Start isEmpty. Operand 4525 states and 7509 transitions. [2021-08-06 19:32:27,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:32:27,396 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:27,396 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:27,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2021-08-06 19:32:27,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:27,596 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:27,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:27,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1302987293, now seen corresponding path program 95 times [2021-08-06 19:32:27,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:27,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463452462] [2021-08-06 19:32:27,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:27,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:27,720 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:32:27,722 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:32:27,743 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:32:27,744 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:32:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 19 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:27,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:27,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463452462] [2021-08-06 19:32:27,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463452462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:27,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638129271] [2021-08-06 19:32:27,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:32:27,749 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:27,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:27,749 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:27,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-06 19:32:30,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-06 19:32:30,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:30,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:32:30,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 17 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:31,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638129271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:31,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:31,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-08-06 19:32:31,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60231477] [2021-08-06 19:32:31,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:32:31,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:31,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:32:31,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:32:31,195 INFO L87 Difference]: Start difference. First operand 4525 states and 7509 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:31,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:31,702 INFO L93 Difference]: Finished difference Result 4821 states and 7872 transitions. [2021-08-06 19:32:31,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:32:31,703 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:32:31,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:31,708 INFO L225 Difference]: With dead ends: 4821 [2021-08-06 19:32:31,708 INFO L226 Difference]: Without dead ends: 4737 [2021-08-06 19:32:31,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:32:31,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4737 states. [2021-08-06 19:32:31,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4737 to 4429. [2021-08-06 19:32:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4429 states, 4428 states have (on average 1.6630532971996386) internal successors, (7364), 4428 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:31,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4429 states to 4429 states and 7364 transitions. [2021-08-06 19:32:31,758 INFO L78 Accepts]: Start accepts. Automaton has 4429 states and 7364 transitions. Word has length 47 [2021-08-06 19:32:31,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:31,758 INFO L470 AbstractCegarLoop]: Abstraction has 4429 states and 7364 transitions. [2021-08-06 19:32:31,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:31,758 INFO L276 IsEmpty]: Start isEmpty. Operand 4429 states and 7364 transitions. [2021-08-06 19:32:31,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:32:31,761 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:31,761 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:31,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2021-08-06 19:32:31,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-08-06 19:32:31,962 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:31,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:31,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1807051939, now seen corresponding path program 96 times [2021-08-06 19:32:31,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:31,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958392796] [2021-08-06 19:32:31,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:31,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:32,049 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:32:32,050 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:32:32,058 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:32:32,060 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:32:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:32:32,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:32,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958392796] [2021-08-06 19:32:32,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958392796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:32,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436789991] [2021-08-06 19:32:32,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:32:32,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:32,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:32,092 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:32,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-06 19:32:35,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-06 19:32:35,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:35,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:32:35,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:32:35,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436789991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:35,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:35,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:32:35,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476789791] [2021-08-06 19:32:35,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:32:35,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:35,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:32:35,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:32:35,477 INFO L87 Difference]: Start difference. First operand 4429 states and 7364 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:35,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:35,722 INFO L93 Difference]: Finished difference Result 4876 states and 8007 transitions. [2021-08-06 19:32:35,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:32:35,723 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:32:35,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:35,728 INFO L225 Difference]: With dead ends: 4876 [2021-08-06 19:32:35,728 INFO L226 Difference]: Without dead ends: 4866 [2021-08-06 19:32:35,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:35,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2021-08-06 19:32:35,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 4430. [2021-08-06 19:32:35,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4430 states, 4429 states have (on average 1.6631293745766538) internal successors, (7366), 4429 states have internal predecessors, (7366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:35,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4430 states to 4430 states and 7366 transitions. [2021-08-06 19:32:35,769 INFO L78 Accepts]: Start accepts. Automaton has 4430 states and 7366 transitions. Word has length 47 [2021-08-06 19:32:35,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:35,769 INFO L470 AbstractCegarLoop]: Abstraction has 4430 states and 7366 transitions. [2021-08-06 19:32:35,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:35,770 INFO L276 IsEmpty]: Start isEmpty. Operand 4430 states and 7366 transitions. [2021-08-06 19:32:35,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:32:35,773 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:35,773 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:35,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2021-08-06 19:32:35,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-08-06 19:32:35,973 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:35,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:35,974 INFO L82 PathProgramCache]: Analyzing trace with hash -2133823, now seen corresponding path program 45 times [2021-08-06 19:32:35,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:35,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324852760] [2021-08-06 19:32:35,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:35,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:36,093 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:36,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:36,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324852760] [2021-08-06 19:32:36,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324852760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:36,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127594121] [2021-08-06 19:32:36,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:32:36,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:36,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:36,094 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:36,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-06 19:32:39,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-06 19:32:39,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:39,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:32:39,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:39,531 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:39,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127594121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:39,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:39,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:32:39,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154892018] [2021-08-06 19:32:39,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:32:39,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:39,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:32:39,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:32:39,532 INFO L87 Difference]: Start difference. First operand 4430 states and 7366 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:39,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:39,918 INFO L93 Difference]: Finished difference Result 5640 states and 9124 transitions. [2021-08-06 19:32:39,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:32:39,918 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:32:39,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:39,924 INFO L225 Difference]: With dead ends: 5640 [2021-08-06 19:32:39,924 INFO L226 Difference]: Without dead ends: 5619 [2021-08-06 19:32:39,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 160.2ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:32:39,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5619 states. [2021-08-06 19:32:39,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5619 to 4521. [2021-08-06 19:32:39,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4521 states, 4520 states have (on average 1.6601769911504425) internal successors, (7504), 4520 states have internal predecessors, (7504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:39,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4521 states to 4521 states and 7504 transitions. [2021-08-06 19:32:39,967 INFO L78 Accepts]: Start accepts. Automaton has 4521 states and 7504 transitions. Word has length 47 [2021-08-06 19:32:39,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:39,967 INFO L470 AbstractCegarLoop]: Abstraction has 4521 states and 7504 transitions. [2021-08-06 19:32:39,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:39,967 INFO L276 IsEmpty]: Start isEmpty. Operand 4521 states and 7504 transitions. [2021-08-06 19:32:39,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:32:39,971 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:39,971 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:39,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2021-08-06 19:32:40,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-08-06 19:32:40,171 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:40,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:40,172 INFO L82 PathProgramCache]: Analyzing trace with hash 160289921, now seen corresponding path program 97 times [2021-08-06 19:32:40,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:40,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362719868] [2021-08-06 19:32:40,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:40,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:40,284 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:32:40,286 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:32:40,308 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:32:40,309 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:32:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 19 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:40,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:40,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362719868] [2021-08-06 19:32:40,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362719868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:40,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515627148] [2021-08-06 19:32:40,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:32:40,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:40,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:40,315 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:40,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-06 19:32:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:43,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:32:43,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 17 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:43,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515627148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:43,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:43,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-08-06 19:32:43,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635379666] [2021-08-06 19:32:43,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:32:43,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:43,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:32:43,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:32:43,902 INFO L87 Difference]: Start difference. First operand 4521 states and 7504 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:44,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:44,470 INFO L93 Difference]: Finished difference Result 4781 states and 7819 transitions. [2021-08-06 19:32:44,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:32:44,470 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:32:44,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:44,476 INFO L225 Difference]: With dead ends: 4781 [2021-08-06 19:32:44,476 INFO L226 Difference]: Without dead ends: 4703 [2021-08-06 19:32:44,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:32:44,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4703 states. [2021-08-06 19:32:44,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4703 to 4388. [2021-08-06 19:32:44,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 4387 states have (on average 1.6621837246409847) internal successors, (7292), 4387 states have internal predecessors, (7292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:44,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 7292 transitions. [2021-08-06 19:32:44,522 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 7292 transitions. Word has length 47 [2021-08-06 19:32:44,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:44,522 INFO L470 AbstractCegarLoop]: Abstraction has 4388 states and 7292 transitions. [2021-08-06 19:32:44,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:44,522 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 7292 transitions. [2021-08-06 19:32:44,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:32:44,525 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:44,525 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:44,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:44,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-06 19:32:44,726 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:44,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:44,726 INFO L82 PathProgramCache]: Analyzing trace with hash 2028911919, now seen corresponding path program 98 times [2021-08-06 19:32:44,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:44,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327482985] [2021-08-06 19:32:44,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:44,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:44,806 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:32:44,807 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:32:44,813 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:32:44,816 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:32:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:32:44,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:44,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327482985] [2021-08-06 19:32:44,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327482985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:44,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525678722] [2021-08-06 19:32:44,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:32:44,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:44,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:44,848 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:44,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-06 19:32:48,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:32:48,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:48,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:32:48,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:32:48,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525678722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:48,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:48,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:32:48,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135631961] [2021-08-06 19:32:48,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:32:48,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:48,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:32:48,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:32:48,323 INFO L87 Difference]: Start difference. First operand 4388 states and 7292 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:48,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:48,567 INFO L93 Difference]: Finished difference Result 4886 states and 8020 transitions. [2021-08-06 19:32:48,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:32:48,567 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:32:48,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:48,572 INFO L225 Difference]: With dead ends: 4886 [2021-08-06 19:32:48,572 INFO L226 Difference]: Without dead ends: 4876 [2021-08-06 19:32:48,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:48,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4876 states. [2021-08-06 19:32:48,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4876 to 4389. [2021-08-06 19:32:48,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4389 states, 4388 states have (on average 1.662260711030082) internal successors, (7294), 4388 states have internal predecessors, (7294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:48,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4389 states to 4389 states and 7294 transitions. [2021-08-06 19:32:48,611 INFO L78 Accepts]: Start accepts. Automaton has 4389 states and 7294 transitions. Word has length 47 [2021-08-06 19:32:48,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:48,611 INFO L470 AbstractCegarLoop]: Abstraction has 4389 states and 7294 transitions. [2021-08-06 19:32:48,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:48,611 INFO L276 IsEmpty]: Start isEmpty. Operand 4389 states and 7294 transitions. [2021-08-06 19:32:48,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:32:48,614 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:48,614 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:48,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2021-08-06 19:32:48,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-06 19:32:48,815 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:48,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:48,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1660564840, now seen corresponding path program 99 times [2021-08-06 19:32:48,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:48,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987990760] [2021-08-06 19:32:48,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:48,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:48,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:48,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987990760] [2021-08-06 19:32:48,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987990760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:48,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977942786] [2021-08-06 19:32:48,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:32:48,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:48,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:48,918 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:48,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-06 19:32:52,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-06 19:32:52,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:52,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:32:52,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:52,362 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:32:52,363 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:32:52,417 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:32:52,418 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:32:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:52,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977942786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:52,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:52,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:32:52,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749338627] [2021-08-06 19:32:52,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:32:52,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:52,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:32:52,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:32:52,444 INFO L87 Difference]: Start difference. First operand 4389 states and 7294 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:52,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:52,594 INFO L93 Difference]: Finished difference Result 5151 states and 8321 transitions. [2021-08-06 19:32:52,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:32:52,595 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:32:52,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:52,600 INFO L225 Difference]: With dead ends: 5151 [2021-08-06 19:32:52,600 INFO L226 Difference]: Without dead ends: 5147 [2021-08-06 19:32:52,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:32:52,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5147 states. [2021-08-06 19:32:52,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5147 to 4356. [2021-08-06 19:32:52,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4356 states, 4355 states have (on average 1.6601607347876004) internal successors, (7230), 4355 states have internal predecessors, (7230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:52,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4356 states to 4356 states and 7230 transitions. [2021-08-06 19:32:52,648 INFO L78 Accepts]: Start accepts. Automaton has 4356 states and 7230 transitions. Word has length 47 [2021-08-06 19:32:52,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:52,648 INFO L470 AbstractCegarLoop]: Abstraction has 4356 states and 7230 transitions. [2021-08-06 19:32:52,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:52,648 INFO L276 IsEmpty]: Start isEmpty. Operand 4356 states and 7230 transitions. [2021-08-06 19:32:52,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:32:52,651 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:52,652 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:52,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:52,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:52,852 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:52,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:52,852 INFO L82 PathProgramCache]: Analyzing trace with hash -203593827, now seen corresponding path program 46 times [2021-08-06 19:32:52,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:52,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006336643] [2021-08-06 19:32:52,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:52,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:53,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:53,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006336643] [2021-08-06 19:32:53,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006336643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:53,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928115276] [2021-08-06 19:32:53,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:32:53,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:53,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:53,027 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:53,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-06 19:32:56,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:32:56,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:56,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:32:56,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:56,599 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:56,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928115276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:56,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:56,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:32:56,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122348726] [2021-08-06 19:32:56,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:32:56,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:56,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:32:56,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:32:56,600 INFO L87 Difference]: Start difference. First operand 4356 states and 7230 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:57,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:57,027 INFO L93 Difference]: Finished difference Result 5934 states and 9540 transitions. [2021-08-06 19:32:57,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:32:57,027 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:32:57,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:57,032 INFO L225 Difference]: With dead ends: 5934 [2021-08-06 19:32:57,032 INFO L226 Difference]: Without dead ends: 5907 [2021-08-06 19:32:57,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:32:57,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5907 states. [2021-08-06 19:32:57,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5907 to 4525. [2021-08-06 19:32:57,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4525 states, 4524 states have (on average 1.6562776304155615) internal successors, (7493), 4524 states have internal predecessors, (7493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:57,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4525 states to 4525 states and 7493 transitions. [2021-08-06 19:32:57,075 INFO L78 Accepts]: Start accepts. Automaton has 4525 states and 7493 transitions. Word has length 47 [2021-08-06 19:32:57,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:57,075 INFO L470 AbstractCegarLoop]: Abstraction has 4525 states and 7493 transitions. [2021-08-06 19:32:57,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:57,075 INFO L276 IsEmpty]: Start isEmpty. Operand 4525 states and 7493 transitions. [2021-08-06 19:32:57,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:32:57,079 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:57,079 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:57,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2021-08-06 19:32:57,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:57,279 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:57,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:57,279 INFO L82 PathProgramCache]: Analyzing trace with hash -26331235, now seen corresponding path program 100 times [2021-08-06 19:32:57,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:57,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248524095] [2021-08-06 19:32:57,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:57,280 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:57,432 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:32:57,435 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:32:57,456 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:32:57,457 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:32:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 19 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:57,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:57,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248524095] [2021-08-06 19:32:57,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248524095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:57,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132718342] [2021-08-06 19:32:57,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:32:57,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:57,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:57,463 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:57,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-06 19:33:00,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:33:00,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:00,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:33:00,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 17 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:01,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132718342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:01,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:01,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-06 19:33:01,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544585610] [2021-08-06 19:33:01,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:33:01,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:01,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:33:01,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:33:01,169 INFO L87 Difference]: Start difference. First operand 4525 states and 7493 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:01,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:01,851 INFO L93 Difference]: Finished difference Result 4738 states and 7749 transitions. [2021-08-06 19:33:01,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:33:01,852 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:33:01,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:01,857 INFO L225 Difference]: With dead ends: 4738 [2021-08-06 19:33:01,857 INFO L226 Difference]: Without dead ends: 4666 [2021-08-06 19:33:01,857 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:33:01,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2021-08-06 19:33:01,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 4422. [2021-08-06 19:33:01,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4422 states, 4421 states have (on average 1.6543768378194978) internal successors, (7314), 4421 states have internal predecessors, (7314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:01,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4422 states to 4422 states and 7314 transitions. [2021-08-06 19:33:01,896 INFO L78 Accepts]: Start accepts. Automaton has 4422 states and 7314 transitions. Word has length 47 [2021-08-06 19:33:01,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:01,897 INFO L470 AbstractCegarLoop]: Abstraction has 4422 states and 7314 transitions. [2021-08-06 19:33:01,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:01,897 INFO L276 IsEmpty]: Start isEmpty. Operand 4422 states and 7314 transitions. [2021-08-06 19:33:01,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:33:01,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:01,900 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:01,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2021-08-06 19:33:02,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-08-06 19:33:02,101 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:02,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:02,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1261606371, now seen corresponding path program 101 times [2021-08-06 19:33:02,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:02,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60546714] [2021-08-06 19:33:02,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:02,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:02,181 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:33:02,182 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:33:02,188 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:33:02,190 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:33:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:33:02,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:02,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60546714] [2021-08-06 19:33:02,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60546714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:02,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029132504] [2021-08-06 19:33:02,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:33:02,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:02,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:02,221 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:02,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-06 19:33:05,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-06 19:33:05,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:05,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:33:05,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:05,773 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:33:05,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029132504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:05,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:05,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:33:05,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122834629] [2021-08-06 19:33:05,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:33:05,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:05,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:33:05,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:33:05,774 INFO L87 Difference]: Start difference. First operand 4422 states and 7314 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:05,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:05,997 INFO L93 Difference]: Finished difference Result 4864 states and 7965 transitions. [2021-08-06 19:33:05,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:33:05,998 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:33:05,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:06,003 INFO L225 Difference]: With dead ends: 4864 [2021-08-06 19:33:06,003 INFO L226 Difference]: Without dead ends: 4854 [2021-08-06 19:33:06,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:33:06,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4854 states. [2021-08-06 19:33:06,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4854 to 4430. [2021-08-06 19:33:06,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4430 states, 4429 states have (on average 1.654323775118537) internal successors, (7327), 4429 states have internal predecessors, (7327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:06,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4430 states to 4430 states and 7327 transitions. [2021-08-06 19:33:06,042 INFO L78 Accepts]: Start accepts. Automaton has 4430 states and 7327 transitions. Word has length 47 [2021-08-06 19:33:06,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:06,042 INFO L470 AbstractCegarLoop]: Abstraction has 4430 states and 7327 transitions. [2021-08-06 19:33:06,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:06,042 INFO L276 IsEmpty]: Start isEmpty. Operand 4430 states and 7327 transitions. [2021-08-06 19:33:06,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:33:06,045 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:06,045 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:06,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2021-08-06 19:33:06,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:06,246 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:06,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:06,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1829260479, now seen corresponding path program 47 times [2021-08-06 19:33:06,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:06,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268788421] [2021-08-06 19:33:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:06,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:06,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:06,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268788421] [2021-08-06 19:33:06,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268788421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:06,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313652023] [2021-08-06 19:33:06,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:33:06,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:06,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:06,383 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:06,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-06 19:33:09,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-06 19:33:09,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:09,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:33:09,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:10,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313652023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:10,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:10,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:33:10,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105505130] [2021-08-06 19:33:10,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:33:10,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:10,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:33:10,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:33:10,094 INFO L87 Difference]: Start difference. First operand 4430 states and 7327 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:10,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:10,552 INFO L93 Difference]: Finished difference Result 5483 states and 8842 transitions. [2021-08-06 19:33:10,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:33:10,552 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:33:10,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:10,558 INFO L225 Difference]: With dead ends: 5483 [2021-08-06 19:33:10,558 INFO L226 Difference]: Without dead ends: 5450 [2021-08-06 19:33:10,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 241.1ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:33:10,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5450 states. [2021-08-06 19:33:10,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5450 to 4577. [2021-08-06 19:33:10,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4577 states, 4576 states have (on average 1.649694055944056) internal successors, (7549), 4576 states have internal predecessors, (7549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:10,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4577 states to 4577 states and 7549 transitions. [2021-08-06 19:33:10,600 INFO L78 Accepts]: Start accepts. Automaton has 4577 states and 7549 transitions. Word has length 47 [2021-08-06 19:33:10,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:10,600 INFO L470 AbstractCegarLoop]: Abstraction has 4577 states and 7549 transitions. [2021-08-06 19:33:10,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:10,600 INFO L276 IsEmpty]: Start isEmpty. Operand 4577 states and 7549 transitions. [2021-08-06 19:33:10,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:33:10,603 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:10,603 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:10,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2021-08-06 19:33:10,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:10,804 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:10,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:10,804 INFO L82 PathProgramCache]: Analyzing trace with hash 862777154, now seen corresponding path program 102 times [2021-08-06 19:33:10,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:10,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380850267] [2021-08-06 19:33:10,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:10,804 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:10,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:10,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380850267] [2021-08-06 19:33:10,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380850267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:10,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930676441] [2021-08-06 19:33:10,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:33:10,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:10,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:10,917 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:10,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-08-06 19:33:14,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-06 19:33:14,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:14,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:33:14,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:14,514 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:33:14,515 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:33:14,536 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:33:14,536 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:33:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:14,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930676441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:14,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:14,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:33:14,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910108522] [2021-08-06 19:33:14,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:33:14,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:14,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:33:14,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:33:14,595 INFO L87 Difference]: Start difference. First operand 4577 states and 7549 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:14,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:14,796 INFO L93 Difference]: Finished difference Result 5306 states and 8544 transitions. [2021-08-06 19:33:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:33:14,796 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:33:14,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:14,802 INFO L225 Difference]: With dead ends: 5306 [2021-08-06 19:33:14,802 INFO L226 Difference]: Without dead ends: 5294 [2021-08-06 19:33:14,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:33:14,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5294 states. [2021-08-06 19:33:14,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5294 to 4524. [2021-08-06 19:33:14,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4524 states, 4523 states have (on average 1.6462524872871989) internal successors, (7446), 4523 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:14,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4524 states to 4524 states and 7446 transitions. [2021-08-06 19:33:14,848 INFO L78 Accepts]: Start accepts. Automaton has 4524 states and 7446 transitions. Word has length 47 [2021-08-06 19:33:14,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:14,849 INFO L470 AbstractCegarLoop]: Abstraction has 4524 states and 7446 transitions. [2021-08-06 19:33:14,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:14,849 INFO L276 IsEmpty]: Start isEmpty. Operand 4524 states and 7446 transitions. [2021-08-06 19:33:14,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:33:14,852 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:14,852 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:14,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:15,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:15,052 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:15,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:15,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1969508607, now seen corresponding path program 103 times [2021-08-06 19:33:15,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:15,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135416407] [2021-08-06 19:33:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:15,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:15,189 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:33:15,192 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:33:15,217 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:33:15,218 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:33:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 19 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:15,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:15,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135416407] [2021-08-06 19:33:15,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135416407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:15,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187767273] [2021-08-06 19:33:15,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:33:15,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:15,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:15,224 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:15,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-08-06 19:33:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:18,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:33:18,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 17 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:19,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187767273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:19,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:19,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-08-06 19:33:19,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023181028] [2021-08-06 19:33:19,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:33:19,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:19,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:33:19,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:33:19,177 INFO L87 Difference]: Start difference. First operand 4524 states and 7446 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:19,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:19,887 INFO L93 Difference]: Finished difference Result 4686 states and 7638 transitions. [2021-08-06 19:33:19,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:33:19,887 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:33:19,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:19,892 INFO L225 Difference]: With dead ends: 4686 [2021-08-06 19:33:19,892 INFO L226 Difference]: Without dead ends: 4620 [2021-08-06 19:33:19,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 179.3ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:33:19,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4620 states. [2021-08-06 19:33:19,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4620 to 4442. [2021-08-06 19:33:19,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4442 states, 4441 states have (on average 1.643548750281468) internal successors, (7299), 4441 states have internal predecessors, (7299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:19,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4442 states to 4442 states and 7299 transitions. [2021-08-06 19:33:19,933 INFO L78 Accepts]: Start accepts. Automaton has 4442 states and 7299 transitions. Word has length 47 [2021-08-06 19:33:19,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:19,933 INFO L470 AbstractCegarLoop]: Abstraction has 4442 states and 7299 transitions. [2021-08-06 19:33:19,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:19,933 INFO L276 IsEmpty]: Start isEmpty. Operand 4442 states and 7299 transitions. [2021-08-06 19:33:19,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:33:19,936 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:19,936 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:19,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2021-08-06 19:33:20,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:20,137 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:20,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:20,137 INFO L82 PathProgramCache]: Analyzing trace with hash -758419857, now seen corresponding path program 104 times [2021-08-06 19:33:20,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:20,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220429760] [2021-08-06 19:33:20,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:20,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:20,217 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:33:20,218 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:33:20,224 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:33:20,226 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:33:20,255 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:33:20,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:20,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220429760] [2021-08-06 19:33:20,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220429760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:20,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607856737] [2021-08-06 19:33:20,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:33:20,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:20,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:20,257 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:20,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-08-06 19:33:23,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:33:23,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:23,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:33:23,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:33:23,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607856737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:23,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:23,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:33:23,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483614604] [2021-08-06 19:33:23,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:33:23,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:23,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:33:23,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:33:23,925 INFO L87 Difference]: Start difference. First operand 4442 states and 7299 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:24,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:24,157 INFO L93 Difference]: Finished difference Result 4795 states and 7816 transitions. [2021-08-06 19:33:24,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:33:24,157 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:33:24,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:24,162 INFO L225 Difference]: With dead ends: 4795 [2021-08-06 19:33:24,162 INFO L226 Difference]: Without dead ends: 4785 [2021-08-06 19:33:24,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:33:24,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4785 states. [2021-08-06 19:33:24,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4785 to 4443. [2021-08-06 19:33:24,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4443 states, 4442 states have (on average 1.6436289959477712) internal successors, (7301), 4442 states have internal predecessors, (7301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:24,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4443 states to 4443 states and 7301 transitions. [2021-08-06 19:33:24,205 INFO L78 Accepts]: Start accepts. Automaton has 4443 states and 7301 transitions. Word has length 47 [2021-08-06 19:33:24,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:24,205 INFO L470 AbstractCegarLoop]: Abstraction has 4443 states and 7301 transitions. [2021-08-06 19:33:24,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:24,205 INFO L276 IsEmpty]: Start isEmpty. Operand 4443 states and 7301 transitions. [2021-08-06 19:33:24,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:33:24,208 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:24,208 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:24,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2021-08-06 19:33:24,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-08-06 19:33:24,409 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:24,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:24,409 INFO L82 PathProgramCache]: Analyzing trace with hash -2013260515, now seen corresponding path program 48 times [2021-08-06 19:33:24,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:24,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956294498] [2021-08-06 19:33:24,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:24,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:24,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:24,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956294498] [2021-08-06 19:33:24,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956294498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:24,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944762958] [2021-08-06 19:33:24,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:33:24,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:24,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:24,582 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:24,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-08-06 19:33:27,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 19:33:27,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:27,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:33:27,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:28,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944762958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:28,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:28,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-08-06 19:33:28,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464727463] [2021-08-06 19:33:28,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:33:28,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:28,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:33:28,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:33:28,263 INFO L87 Difference]: Start difference. First operand 4443 states and 7301 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:29,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:29,093 INFO L93 Difference]: Finished difference Result 5619 states and 9020 transitions. [2021-08-06 19:33:29,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 19:33:29,093 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:33:29,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:29,099 INFO L225 Difference]: With dead ends: 5619 [2021-08-06 19:33:29,099 INFO L226 Difference]: Without dead ends: 5580 [2021-08-06 19:33:29,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 594.1ms TimeCoverageRelationStatistics Valid=334, Invalid=2116, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 19:33:29,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5580 states. [2021-08-06 19:33:29,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5580 to 4348. [2021-08-06 19:33:29,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4348 states, 4347 states have (on average 1.6445824706694272) internal successors, (7149), 4347 states have internal predecessors, (7149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:29,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4348 states to 4348 states and 7149 transitions. [2021-08-06 19:33:29,138 INFO L78 Accepts]: Start accepts. Automaton has 4348 states and 7149 transitions. Word has length 47 [2021-08-06 19:33:29,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:29,138 INFO L470 AbstractCegarLoop]: Abstraction has 4348 states and 7149 transitions. [2021-08-06 19:33:29,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:29,138 INFO L276 IsEmpty]: Start isEmpty. Operand 4348 states and 7149 transitions. [2021-08-06 19:33:29,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:33:29,141 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:29,141 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:29,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:29,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-08-06 19:33:29,345 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:29,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:29,345 INFO L82 PathProgramCache]: Analyzing trace with hash 697584925, now seen corresponding path program 105 times [2021-08-06 19:33:29,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:29,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663000595] [2021-08-06 19:33:29,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:29,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:29,514 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 74.1 percent of original size [2021-08-06 19:33:29,516 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 74.1 percent of original size [2021-08-06 19:33:29,541 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:33:29,542 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:33:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 17 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:29,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:29,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663000595] [2021-08-06 19:33:29,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663000595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:29,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436745685] [2021-08-06 19:33:29,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:33:29,548 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:29,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:29,549 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:29,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2021-08-06 19:33:33,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 19:33:33,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:33,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:33:33,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 17 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:33,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436745685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:33,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:33,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-08-06 19:33:33,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407646009] [2021-08-06 19:33:33,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 19:33:33,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:33,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 19:33:33,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:33:33,384 INFO L87 Difference]: Start difference. First operand 4348 states and 7149 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:33,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:33,960 INFO L93 Difference]: Finished difference Result 4536 states and 7379 transitions. [2021-08-06 19:33:33,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:33:33,960 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:33:33,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:33,965 INFO L225 Difference]: With dead ends: 4536 [2021-08-06 19:33:33,965 INFO L226 Difference]: Without dead ends: 4467 [2021-08-06 19:33:33,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 273.2ms TimeCoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:33:33,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4467 states. [2021-08-06 19:33:34,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4467 to 4276. [2021-08-06 19:33:34,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4276 states, 4275 states have (on average 1.6451461988304095) internal successors, (7033), 4275 states have internal predecessors, (7033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:34,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4276 states to 4276 states and 7033 transitions. [2021-08-06 19:33:34,009 INFO L78 Accepts]: Start accepts. Automaton has 4276 states and 7033 transitions. Word has length 47 [2021-08-06 19:33:34,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:34,009 INFO L470 AbstractCegarLoop]: Abstraction has 4276 states and 7033 transitions. [2021-08-06 19:33:34,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:34,009 INFO L276 IsEmpty]: Start isEmpty. Operand 4276 states and 7033 transitions. [2021-08-06 19:33:34,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:33:34,012 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:34,012 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:34,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2021-08-06 19:33:34,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:34,213 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:34,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:34,213 INFO L82 PathProgramCache]: Analyzing trace with hash 235155677, now seen corresponding path program 106 times [2021-08-06 19:33:34,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:34,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497884752] [2021-08-06 19:33:34,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:34,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:34,340 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:33:34,342 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:33:34,356 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 73.7 percent of original size [2021-08-06 19:33:34,359 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 73.7 percent of original size [2021-08-06 19:33:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:34,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:34,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497884752] [2021-08-06 19:33:34,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497884752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:34,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872800545] [2021-08-06 19:33:34,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:33:34,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:34,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:34,393 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:34,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2021-08-06 19:33:37,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:33:37,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:37,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:33:37,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:38,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872800545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:38,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:38,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 15 [2021-08-06 19:33:38,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446511302] [2021-08-06 19:33:38,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:33:38,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:38,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:33:38,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:33:38,254 INFO L87 Difference]: Start difference. First operand 4276 states and 7033 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:38,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:38,690 INFO L93 Difference]: Finished difference Result 4658 states and 7586 transitions. [2021-08-06 19:33:38,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:33:38,690 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:33:38,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:38,695 INFO L225 Difference]: With dead ends: 4658 [2021-08-06 19:33:38,695 INFO L226 Difference]: Without dead ends: 4658 [2021-08-06 19:33:38,695 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 256.3ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:33:38,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4658 states. [2021-08-06 19:33:38,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4658 to 4293. [2021-08-06 19:33:38,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4293 states, 4292 states have (on average 1.646318732525629) internal successors, (7066), 4292 states have internal predecessors, (7066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 7066 transitions. [2021-08-06 19:33:38,733 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 7066 transitions. Word has length 47 [2021-08-06 19:33:38,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:38,734 INFO L470 AbstractCegarLoop]: Abstraction has 4293 states and 7066 transitions. [2021-08-06 19:33:38,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:38,734 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 7066 transitions. [2021-08-06 19:33:38,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:33:38,737 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:38,737 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:38,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:38,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-08-06 19:33:38,937 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:38,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:38,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1071787190, now seen corresponding path program 49 times [2021-08-06 19:33:38,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:38,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471584986] [2021-08-06 19:33:38,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:38,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 51 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:39,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:39,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471584986] [2021-08-06 19:33:39,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471584986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:39,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956082067] [2021-08-06 19:33:39,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:33:39,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:39,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:39,047 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:39,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2021-08-06 19:33:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:42,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:33:42,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:42,820 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:33:42,821 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:33:42,837 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 51 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:42,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956082067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:42,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:42,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 19:33:42,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30851188] [2021-08-06 19:33:42,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:33:42,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:42,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:33:42,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:33:42,838 INFO L87 Difference]: Start difference. First operand 4293 states and 7066 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:42,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:42,999 INFO L93 Difference]: Finished difference Result 6301 states and 10184 transitions. [2021-08-06 19:33:42,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:33:42,999 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:33:42,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:43,005 INFO L225 Difference]: With dead ends: 6301 [2021-08-06 19:33:43,006 INFO L226 Difference]: Without dead ends: 6301 [2021-08-06 19:33:43,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:33:43,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6301 states. [2021-08-06 19:33:43,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6301 to 4912. [2021-08-06 19:33:43,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4912 states, 4911 states have (on average 1.664426796986357) internal successors, (8174), 4911 states have internal predecessors, (8174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:43,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4912 states to 4912 states and 8174 transitions. [2021-08-06 19:33:43,057 INFO L78 Accepts]: Start accepts. Automaton has 4912 states and 8174 transitions. Word has length 47 [2021-08-06 19:33:43,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:43,057 INFO L470 AbstractCegarLoop]: Abstraction has 4912 states and 8174 transitions. [2021-08-06 19:33:43,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:43,058 INFO L276 IsEmpty]: Start isEmpty. Operand 4912 states and 8174 transitions. [2021-08-06 19:33:43,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:33:43,085 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:43,085 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:43,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2021-08-06 19:33:43,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:43,293 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:43,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:43,293 INFO L82 PathProgramCache]: Analyzing trace with hash -133191402, now seen corresponding path program 107 times [2021-08-06 19:33:43,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:43,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568601176] [2021-08-06 19:33:43,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:43,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:43,407 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:43,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:43,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568601176] [2021-08-06 19:33:43,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568601176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:43,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828862223] [2021-08-06 19:33:43,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:33:43,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:43,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:43,408 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:43,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2021-08-06 19:33:46,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-06 19:33:46,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:46,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:33:46,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:47,152 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:33:47,153 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:33:47,202 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:33:47,203 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:33:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 44 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:47,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828862223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:47,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:47,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2021-08-06 19:33:47,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815261797] [2021-08-06 19:33:47,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:33:47,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:47,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:33:47,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:33:47,229 INFO L87 Difference]: Start difference. First operand 4912 states and 8174 transitions. Second operand has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 16 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:47,427 INFO L93 Difference]: Finished difference Result 5297 states and 8713 transitions. [2021-08-06 19:33:47,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:33:47,427 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 16 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:33:47,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:47,433 INFO L225 Difference]: With dead ends: 5297 [2021-08-06 19:33:47,433 INFO L226 Difference]: Without dead ends: 5293 [2021-08-06 19:33:47,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:33:47,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5293 states. [2021-08-06 19:33:47,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5293 to 4835. [2021-08-06 19:33:47,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4835 states, 4834 states have (on average 1.6617707902358296) internal successors, (8033), 4834 states have internal predecessors, (8033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:47,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4835 states to 4835 states and 8033 transitions. [2021-08-06 19:33:47,479 INFO L78 Accepts]: Start accepts. Automaton has 4835 states and 8033 transitions. Word has length 47 [2021-08-06 19:33:47,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:47,479 INFO L470 AbstractCegarLoop]: Abstraction has 4835 states and 8033 transitions. [2021-08-06 19:33:47,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 16 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:47,479 INFO L276 IsEmpty]: Start isEmpty. Operand 4835 states and 8033 transitions. [2021-08-06 19:33:47,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:33:47,482 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:47,482 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:47,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:47,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-08-06 19:33:47,683 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:47,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:47,683 INFO L82 PathProgramCache]: Analyzing trace with hash 2085210564, now seen corresponding path program 108 times [2021-08-06 19:33:47,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:47,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271624971] [2021-08-06 19:33:47,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:47,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 23 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:33:47,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:47,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271624971] [2021-08-06 19:33:47,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271624971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:47,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217385388] [2021-08-06 19:33:47,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:33:47,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:47,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:47,794 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:47,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2021-08-06 19:33:51,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-06 19:33:51,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:51,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:33:51,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:51,574 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:33:51,576 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:33:51,625 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:33:51,625 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:33:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:33:51,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217385388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:51,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:51,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:33:51,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755313063] [2021-08-06 19:33:51,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:33:51,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:51,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:33:51,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:33:51,652 INFO L87 Difference]: Start difference. First operand 4835 states and 8033 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:51,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:51,802 INFO L93 Difference]: Finished difference Result 5287 states and 8627 transitions. [2021-08-06 19:33:51,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:33:51,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:33:51,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:51,808 INFO L225 Difference]: With dead ends: 5287 [2021-08-06 19:33:51,808 INFO L226 Difference]: Without dead ends: 5285 [2021-08-06 19:33:51,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:33:51,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5285 states. [2021-08-06 19:33:51,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5285 to 4796. [2021-08-06 19:33:51,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4796 states, 4795 states have (on average 1.6638164754953075) internal successors, (7978), 4795 states have internal predecessors, (7978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:51,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4796 states to 4796 states and 7978 transitions. [2021-08-06 19:33:51,856 INFO L78 Accepts]: Start accepts. Automaton has 4796 states and 7978 transitions. Word has length 47 [2021-08-06 19:33:51,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:51,856 INFO L470 AbstractCegarLoop]: Abstraction has 4796 states and 7978 transitions. [2021-08-06 19:33:51,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:51,856 INFO L276 IsEmpty]: Start isEmpty. Operand 4796 states and 7978 transitions. [2021-08-06 19:33:51,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:33:51,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:51,860 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:51,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2021-08-06 19:33:52,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-08-06 19:33:52,060 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:52,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:52,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1508016867, now seen corresponding path program 109 times [2021-08-06 19:33:52,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:52,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517424955] [2021-08-06 19:33:52,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:52,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:52,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:52,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517424955] [2021-08-06 19:33:52,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517424955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:52,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517720112] [2021-08-06 19:33:52,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:33:52,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:52,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:52,169 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:52,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2021-08-06 19:33:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:55,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:33:55,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:56,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517720112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:56,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:56,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:33:56,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809630284] [2021-08-06 19:33:56,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:33:56,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:56,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:33:56,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:33:56,048 INFO L87 Difference]: Start difference. First operand 4796 states and 7978 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:56,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:56,308 INFO L93 Difference]: Finished difference Result 5606 states and 9170 transitions. [2021-08-06 19:33:56,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:33:56,309 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:33:56,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:56,315 INFO L225 Difference]: With dead ends: 5606 [2021-08-06 19:33:56,315 INFO L226 Difference]: Without dead ends: 5596 [2021-08-06 19:33:56,315 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:33:56,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5596 states. [2021-08-06 19:33:56,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5596 to 4835. [2021-08-06 19:33:56,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4835 states, 4834 states have (on average 1.6623913942904427) internal successors, (8036), 4834 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:56,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4835 states to 4835 states and 8036 transitions. [2021-08-06 19:33:56,363 INFO L78 Accepts]: Start accepts. Automaton has 4835 states and 8036 transitions. Word has length 47 [2021-08-06 19:33:56,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:56,363 INFO L470 AbstractCegarLoop]: Abstraction has 4835 states and 8036 transitions. [2021-08-06 19:33:56,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:56,364 INFO L276 IsEmpty]: Start isEmpty. Operand 4835 states and 8036 transitions. [2021-08-06 19:33:56,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:33:56,367 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:56,367 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:56,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2021-08-06 19:33:56,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:56,567 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:56,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:56,568 INFO L82 PathProgramCache]: Analyzing trace with hash -671385354, now seen corresponding path program 50 times [2021-08-06 19:33:56,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:56,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474377270] [2021-08-06 19:33:56,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:56,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 59 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:33:56,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:56,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474377270] [2021-08-06 19:33:56,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474377270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:56,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457368380] [2021-08-06 19:33:56,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:33:56,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:56,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:56,693 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:56,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2021-08-06 19:34:00,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:34:00,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:00,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:34:00,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:00,622 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:34:00,623 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:34:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:00,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457368380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:00,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:00,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 19:34:00,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083334128] [2021-08-06 19:34:00,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:34:00,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:00,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:34:00,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:34:00,642 INFO L87 Difference]: Start difference. First operand 4835 states and 8036 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:00,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:00,849 INFO L93 Difference]: Finished difference Result 6664 states and 10742 transitions. [2021-08-06 19:34:00,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:34:00,849 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:34:00,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:00,859 INFO L225 Difference]: With dead ends: 6664 [2021-08-06 19:34:00,859 INFO L226 Difference]: Without dead ends: 6664 [2021-08-06 19:34:00,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:34:00,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6664 states. [2021-08-06 19:34:00,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6664 to 4903. [2021-08-06 19:34:00,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4903 states, 4902 states have (on average 1.6660546715626274) internal successors, (8167), 4902 states have internal predecessors, (8167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:00,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4903 states to 4903 states and 8167 transitions. [2021-08-06 19:34:00,926 INFO L78 Accepts]: Start accepts. Automaton has 4903 states and 8167 transitions. Word has length 47 [2021-08-06 19:34:00,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:00,927 INFO L470 AbstractCegarLoop]: Abstraction has 4903 states and 8167 transitions. [2021-08-06 19:34:00,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:00,927 INFO L276 IsEmpty]: Start isEmpty. Operand 4903 states and 8167 transitions. [2021-08-06 19:34:00,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:34:00,930 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:00,930 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:00,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2021-08-06 19:34:01,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:01,131 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:01,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:01,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1316464246, now seen corresponding path program 51 times [2021-08-06 19:34:01,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:01,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990839954] [2021-08-06 19:34:01,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:01,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 51 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:01,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:01,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990839954] [2021-08-06 19:34:01,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990839954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:01,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709469659] [2021-08-06 19:34:01,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:34:01,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:01,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:01,269 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:01,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2021-08-06 19:34:04,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-06 19:34:04,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:04,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:34:04,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:05,222 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:34:05,223 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:34:05,239 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 51 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:05,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709469659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:05,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:05,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 19:34:05,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080535489] [2021-08-06 19:34:05,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:34:05,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:05,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:34:05,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:34:05,240 INFO L87 Difference]: Start difference. First operand 4903 states and 8167 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:05,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:05,431 INFO L93 Difference]: Finished difference Result 6155 states and 9952 transitions. [2021-08-06 19:34:05,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:34:05,431 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:34:05,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:05,438 INFO L225 Difference]: With dead ends: 6155 [2021-08-06 19:34:05,438 INFO L226 Difference]: Without dead ends: 6155 [2021-08-06 19:34:05,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:34:05,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6155 states. [2021-08-06 19:34:05,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6155 to 4732. [2021-08-06 19:34:05,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4732 states, 4731 states have (on average 1.6590572817586133) internal successors, (7849), 4731 states have internal predecessors, (7849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:05,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4732 states to 4732 states and 7849 transitions. [2021-08-06 19:34:05,490 INFO L78 Accepts]: Start accepts. Automaton has 4732 states and 7849 transitions. Word has length 47 [2021-08-06 19:34:05,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:05,490 INFO L470 AbstractCegarLoop]: Abstraction has 4732 states and 7849 transitions. [2021-08-06 19:34:05,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:05,490 INFO L276 IsEmpty]: Start isEmpty. Operand 4732 states and 7849 transitions. [2021-08-06 19:34:05,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:34:05,493 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:05,494 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:05,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2021-08-06 19:34:05,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:05,697 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:05,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:05,697 INFO L82 PathProgramCache]: Analyzing trace with hash -231559650, now seen corresponding path program 110 times [2021-08-06 19:34:05,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:05,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437450160] [2021-08-06 19:34:05,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:05,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:05,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:05,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437450160] [2021-08-06 19:34:05,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437450160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:05,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989244523] [2021-08-06 19:34:05,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:34:05,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:05,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:05,816 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:05,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2021-08-06 19:34:09,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:34:09,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:09,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:34:09,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:09,709 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:34:09,711 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:34:09,795 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:34:09,795 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:34:09,823 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:09,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989244523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:09,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:09,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:34:09,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38296378] [2021-08-06 19:34:09,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:34:09,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:09,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:34:09,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:34:09,824 INFO L87 Difference]: Start difference. First operand 4732 states and 7849 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:09,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:09,971 INFO L93 Difference]: Finished difference Result 5115 states and 8356 transitions. [2021-08-06 19:34:09,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:34:09,971 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:34:09,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:09,977 INFO L225 Difference]: With dead ends: 5115 [2021-08-06 19:34:09,977 INFO L226 Difference]: Without dead ends: 5103 [2021-08-06 19:34:09,977 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:34:09,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5103 states. [2021-08-06 19:34:10,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5103 to 4726. [2021-08-06 19:34:10,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4726 states, 4725 states have (on average 1.6594708994708995) internal successors, (7841), 4725 states have internal predecessors, (7841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:10,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4726 states to 4726 states and 7841 transitions. [2021-08-06 19:34:10,029 INFO L78 Accepts]: Start accepts. Automaton has 4726 states and 7841 transitions. Word has length 47 [2021-08-06 19:34:10,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:10,029 INFO L470 AbstractCegarLoop]: Abstraction has 4726 states and 7841 transitions. [2021-08-06 19:34:10,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:10,029 INFO L276 IsEmpty]: Start isEmpty. Operand 4726 states and 7841 transitions. [2021-08-06 19:34:10,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:34:10,033 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:10,033 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:10,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:10,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-08-06 19:34:10,233 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:10,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:10,233 INFO L82 PathProgramCache]: Analyzing trace with hash -458571178, now seen corresponding path program 111 times [2021-08-06 19:34:10,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:10,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301530176] [2021-08-06 19:34:10,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:10,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 21 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:10,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:10,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301530176] [2021-08-06 19:34:10,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301530176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:10,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766134828] [2021-08-06 19:34:10,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:34:10,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:10,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:10,345 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:10,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2021-08-06 19:34:14,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-08-06 19:34:14,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:14,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:34:14,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:14,288 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:34:14,289 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:34:14,339 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:34:14,339 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:34:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:14,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766134828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:14,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:14,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:34:14,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241204240] [2021-08-06 19:34:14,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:34:14,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:14,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:34:14,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:34:14,365 INFO L87 Difference]: Start difference. First operand 4726 states and 7841 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:14,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:14,494 INFO L93 Difference]: Finished difference Result 5304 states and 8600 transitions. [2021-08-06 19:34:14,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:34:14,494 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:34:14,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:14,500 INFO L225 Difference]: With dead ends: 5304 [2021-08-06 19:34:14,500 INFO L226 Difference]: Without dead ends: 5298 [2021-08-06 19:34:14,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:34:14,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5298 states. [2021-08-06 19:34:14,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5298 to 4726. [2021-08-06 19:34:14,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4726 states, 4725 states have (on average 1.6584126984126983) internal successors, (7836), 4725 states have internal predecessors, (7836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:14,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4726 states to 4726 states and 7836 transitions. [2021-08-06 19:34:14,552 INFO L78 Accepts]: Start accepts. Automaton has 4726 states and 7836 transitions. Word has length 47 [2021-08-06 19:34:14,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:14,552 INFO L470 AbstractCegarLoop]: Abstraction has 4726 states and 7836 transitions. [2021-08-06 19:34:14,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:14,553 INFO L276 IsEmpty]: Start isEmpty. Operand 4726 states and 7836 transitions. [2021-08-06 19:34:14,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:34:14,557 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:14,557 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:14,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2021-08-06 19:34:14,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:14,757 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:14,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:14,758 INFO L82 PathProgramCache]: Analyzing trace with hash 243168687, now seen corresponding path program 112 times [2021-08-06 19:34:14,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:14,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84939863] [2021-08-06 19:34:14,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:14,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:34:14,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:14,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84939863] [2021-08-06 19:34:14,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84939863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:14,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229884968] [2021-08-06 19:34:14,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:34:14,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:14,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:14,873 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:14,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2021-08-06 19:34:18,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:34:18,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:18,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:34:18,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:34:18,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229884968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:18,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:18,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:34:18,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636242767] [2021-08-06 19:34:18,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:34:18,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:18,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:34:18,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:34:18,935 INFO L87 Difference]: Start difference. First operand 4726 states and 7836 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:19,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:19,233 INFO L93 Difference]: Finished difference Result 5973 states and 9709 transitions. [2021-08-06 19:34:19,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:34:19,233 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:34:19,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:19,240 INFO L225 Difference]: With dead ends: 5973 [2021-08-06 19:34:19,240 INFO L226 Difference]: Without dead ends: 5938 [2021-08-06 19:34:19,240 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:34:19,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5938 states. [2021-08-06 19:34:19,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5938 to 4760. [2021-08-06 19:34:19,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4760 states, 4759 states have (on average 1.660853120403446) internal successors, (7904), 4759 states have internal predecessors, (7904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:19,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4760 states to 4760 states and 7904 transitions. [2021-08-06 19:34:19,294 INFO L78 Accepts]: Start accepts. Automaton has 4760 states and 7904 transitions. Word has length 47 [2021-08-06 19:34:19,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:19,294 INFO L470 AbstractCegarLoop]: Abstraction has 4760 states and 7904 transitions. [2021-08-06 19:34:19,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:19,294 INFO L276 IsEmpty]: Start isEmpty. Operand 4760 states and 7904 transitions. [2021-08-06 19:34:19,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:34:19,298 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:19,298 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:19,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2021-08-06 19:34:19,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:19,498 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:19,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:19,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1519625904, now seen corresponding path program 113 times [2021-08-06 19:34:19,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:19,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122559855] [2021-08-06 19:34:19,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:19,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 21 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:19,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:19,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122559855] [2021-08-06 19:34:19,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122559855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:19,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870966014] [2021-08-06 19:34:19,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:34:19,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:19,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:19,619 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:19,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2021-08-06 19:34:23,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-08-06 19:34:23,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:23,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:34:23,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:23,594 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:34:23,596 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:34:23,676 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:34:23,677 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:34:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:23,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870966014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:23,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:23,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 15 [2021-08-06 19:34:23,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484247490] [2021-08-06 19:34:23,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:34:23,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:23,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:34:23,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:34:23,703 INFO L87 Difference]: Start difference. First operand 4760 states and 7904 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:23,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:23,960 INFO L93 Difference]: Finished difference Result 5481 states and 8866 transitions. [2021-08-06 19:34:23,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:34:23,961 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:34:23,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:23,967 INFO L225 Difference]: With dead ends: 5481 [2021-08-06 19:34:23,967 INFO L226 Difference]: Without dead ends: 5465 [2021-08-06 19:34:23,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:34:23,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5465 states. [2021-08-06 19:34:24,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5465 to 4448. [2021-08-06 19:34:24,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4448 states, 4447 states have (on average 1.6557229592984035) internal successors, (7363), 4447 states have internal predecessors, (7363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:24,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4448 states to 4448 states and 7363 transitions. [2021-08-06 19:34:24,019 INFO L78 Accepts]: Start accepts. Automaton has 4448 states and 7363 transitions. Word has length 47 [2021-08-06 19:34:24,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:24,019 INFO L470 AbstractCegarLoop]: Abstraction has 4448 states and 7363 transitions. [2021-08-06 19:34:24,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:24,019 INFO L276 IsEmpty]: Start isEmpty. Operand 4448 states and 7363 transitions. [2021-08-06 19:34:24,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:34:24,022 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:24,022 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:24,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2021-08-06 19:34:24,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-08-06 19:34:24,223 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:24,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:24,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1911699235, now seen corresponding path program 114 times [2021-08-06 19:34:24,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:24,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100299277] [2021-08-06 19:34:24,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:24,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:24,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:24,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100299277] [2021-08-06 19:34:24,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100299277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:24,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319884129] [2021-08-06 19:34:24,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:34:24,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:24,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:24,348 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:24,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2021-08-06 19:34:28,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-06 19:34:28,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:28,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:34:28,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:28,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319884129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:28,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:28,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:34:28,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709857091] [2021-08-06 19:34:28,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:34:28,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:28,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:34:28,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:34:28,433 INFO L87 Difference]: Start difference. First operand 4448 states and 7363 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:28,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:28,737 INFO L93 Difference]: Finished difference Result 5795 states and 9311 transitions. [2021-08-06 19:34:28,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:34:28,738 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:34:28,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:28,744 INFO L225 Difference]: With dead ends: 5795 [2021-08-06 19:34:28,744 INFO L226 Difference]: Without dead ends: 5750 [2021-08-06 19:34:28,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:34:28,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5750 states. [2021-08-06 19:34:28,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5750 to 4454. [2021-08-06 19:34:28,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4454 states, 4453 states have (on average 1.6490006737031215) internal successors, (7343), 4453 states have internal predecessors, (7343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:28,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4454 states to 4454 states and 7343 transitions. [2021-08-06 19:34:28,791 INFO L78 Accepts]: Start accepts. Automaton has 4454 states and 7343 transitions. Word has length 47 [2021-08-06 19:34:28,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:28,791 INFO L470 AbstractCegarLoop]: Abstraction has 4454 states and 7343 transitions. [2021-08-06 19:34:28,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:28,791 INFO L276 IsEmpty]: Start isEmpty. Operand 4454 states and 7343 transitions. [2021-08-06 19:34:28,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:34:28,794 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:28,794 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:28,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:28,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:28,995 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:28,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:28,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1075067722, now seen corresponding path program 52 times [2021-08-06 19:34:28,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:28,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905198289] [2021-08-06 19:34:28,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:28,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:29,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:29,104 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:29,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:29,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905198289] [2021-08-06 19:34:29,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905198289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:29,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445585278] [2021-08-06 19:34:29,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:34:29,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:29,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:29,105 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:29,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2021-08-06 19:34:32,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:34:32,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:32,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:34:32,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:33,305 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:34:33,306 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:34:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:33,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445585278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:33,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:33,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 19:34:33,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199424837] [2021-08-06 19:34:33,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:34:33,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:33,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:34:33,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:34:33,323 INFO L87 Difference]: Start difference. First operand 4454 states and 7343 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:33,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:33,502 INFO L93 Difference]: Finished difference Result 6729 states and 10790 transitions. [2021-08-06 19:34:33,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:34:33,503 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:34:33,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:33,509 INFO L225 Difference]: With dead ends: 6729 [2021-08-06 19:34:33,509 INFO L226 Difference]: Without dead ends: 6729 [2021-08-06 19:34:33,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:34:33,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6729 states. [2021-08-06 19:34:33,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6729 to 4650. [2021-08-06 19:34:33,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4650 states, 4649 states have (on average 1.6586362658636267) internal successors, (7711), 4649 states have internal predecessors, (7711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:33,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4650 states to 4650 states and 7711 transitions. [2021-08-06 19:34:33,561 INFO L78 Accepts]: Start accepts. Automaton has 4650 states and 7711 transitions. Word has length 47 [2021-08-06 19:34:33,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:33,561 INFO L470 AbstractCegarLoop]: Abstraction has 4650 states and 7711 transitions. [2021-08-06 19:34:33,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:33,561 INFO L276 IsEmpty]: Start isEmpty. Operand 4650 states and 7711 transitions. [2021-08-06 19:34:33,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:34:33,564 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:33,564 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:33,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2021-08-06 19:34:33,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:33,767 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:33,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:33,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1720146614, now seen corresponding path program 53 times [2021-08-06 19:34:33,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:33,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883116940] [2021-08-06 19:34:33,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:33,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:33,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:33,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883116940] [2021-08-06 19:34:33,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883116940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:33,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773496240] [2021-08-06 19:34:33,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:34:33,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:33,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:33,909 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:33,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2021-08-06 19:34:37,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-06 19:34:37,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:37,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:34:37,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:38,051 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:34:38,051 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:34:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 59 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:38,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773496240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:38,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:38,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 14 [2021-08-06 19:34:38,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427489411] [2021-08-06 19:34:38,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:34:38,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:38,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:34:38,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:34:38,075 INFO L87 Difference]: Start difference. First operand 4650 states and 7711 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:38,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:38,300 INFO L93 Difference]: Finished difference Result 6747 states and 10821 transitions. [2021-08-06 19:34:38,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:34:38,301 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:34:38,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:38,307 INFO L225 Difference]: With dead ends: 6747 [2021-08-06 19:34:38,307 INFO L226 Difference]: Without dead ends: 6747 [2021-08-06 19:34:38,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:34:38,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6747 states. [2021-08-06 19:34:38,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6747 to 4663. [2021-08-06 19:34:38,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 1.6585156585156584) internal successors, (7732), 4662 states have internal predecessors, (7732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:38,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 7732 transitions. [2021-08-06 19:34:38,362 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 7732 transitions. Word has length 47 [2021-08-06 19:34:38,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:38,362 INFO L470 AbstractCegarLoop]: Abstraction has 4663 states and 7732 transitions. [2021-08-06 19:34:38,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:38,362 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 7732 transitions. [2021-08-06 19:34:38,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:34:38,367 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:38,367 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:38,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:38,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:38,589 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:38,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:38,589 INFO L82 PathProgramCache]: Analyzing trace with hash 713231414, now seen corresponding path program 54 times [2021-08-06 19:34:38,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:38,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280303245] [2021-08-06 19:34:38,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:38,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 51 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:38,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:38,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280303245] [2021-08-06 19:34:38,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280303245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:38,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442702980] [2021-08-06 19:34:38,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:34:38,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:38,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:38,719 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:38,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2021-08-06 19:34:42,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-06 19:34:42,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:42,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:34:42,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:42,981 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 95.5 percent of original size [2021-08-06 19:34:42,982 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 95.5 percent of original size [2021-08-06 19:34:43,015 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 82 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:43,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442702980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:43,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:43,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-08-06 19:34:43,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511775271] [2021-08-06 19:34:43,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:34:43,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:43,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:34:43,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:34:43,016 INFO L87 Difference]: Start difference. First operand 4663 states and 7732 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:43,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:43,319 INFO L93 Difference]: Finished difference Result 5822 states and 9384 transitions. [2021-08-06 19:34:43,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:34:43,320 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:34:43,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:43,326 INFO L225 Difference]: With dead ends: 5822 [2021-08-06 19:34:43,326 INFO L226 Difference]: Without dead ends: 5822 [2021-08-06 19:34:43,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:34:43,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5822 states. [2021-08-06 19:34:43,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5822 to 4389. [2021-08-06 19:34:43,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4389 states, 4388 states have (on average 1.65154968094804) internal successors, (7247), 4388 states have internal predecessors, (7247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:43,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4389 states to 4389 states and 7247 transitions. [2021-08-06 19:34:43,376 INFO L78 Accepts]: Start accepts. Automaton has 4389 states and 7247 transitions. Word has length 47 [2021-08-06 19:34:43,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:43,376 INFO L470 AbstractCegarLoop]: Abstraction has 4389 states and 7247 transitions. [2021-08-06 19:34:43,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:43,376 INFO L276 IsEmpty]: Start isEmpty. Operand 4389 states and 7247 transitions. [2021-08-06 19:34:43,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:34:43,379 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:43,379 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:43,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2021-08-06 19:34:43,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:43,580 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:43,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:43,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1552339946, now seen corresponding path program 115 times [2021-08-06 19:34:43,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:43,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509209832] [2021-08-06 19:34:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:43,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:43,713 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:43,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:43,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509209832] [2021-08-06 19:34:43,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509209832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:43,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14146782] [2021-08-06 19:34:43,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:34:43,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:43,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:43,714 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:43,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2021-08-06 19:34:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:47,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:34:47,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:47,892 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:34:47,893 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:34:48,003 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:34:48,003 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:34:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 34 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:48,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14146782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:48,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:48,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:34:48,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431502236] [2021-08-06 19:34:48,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:34:48,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:48,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:34:48,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:34:48,030 INFO L87 Difference]: Start difference. First operand 4389 states and 7247 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:48,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:48,212 INFO L93 Difference]: Finished difference Result 4899 states and 7919 transitions. [2021-08-06 19:34:48,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:34:48,212 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:34:48,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:48,218 INFO L225 Difference]: With dead ends: 4899 [2021-08-06 19:34:48,218 INFO L226 Difference]: Without dead ends: 4881 [2021-08-06 19:34:48,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:34:48,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4881 states. [2021-08-06 19:34:48,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4881 to 4383. [2021-08-06 19:34:48,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4383 states, 4382 states have (on average 1.6519853947968963) internal successors, (7239), 4382 states have internal predecessors, (7239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:48,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4383 states to 4383 states and 7239 transitions. [2021-08-06 19:34:48,267 INFO L78 Accepts]: Start accepts. Automaton has 4383 states and 7239 transitions. Word has length 47 [2021-08-06 19:34:48,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:48,267 INFO L470 AbstractCegarLoop]: Abstraction has 4383 states and 7239 transitions. [2021-08-06 19:34:48,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:48,268 INFO L276 IsEmpty]: Start isEmpty. Operand 4383 states and 7239 transitions. [2021-08-06 19:34:48,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:34:48,271 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:48,271 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:48,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2021-08-06 19:34:48,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:48,471 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:48,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:48,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1155736611, now seen corresponding path program 116 times [2021-08-06 19:34:48,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:48,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348767703] [2021-08-06 19:34:48,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:48,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:48,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:34:48,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:48,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348767703] [2021-08-06 19:34:48,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348767703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:48,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450185315] [2021-08-06 19:34:48,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:34:48,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:48,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:48,586 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:48,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2021-08-06 19:34:52,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:34:52,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:52,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:34:52,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:52,798 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:34:52,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450185315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:52,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:52,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:34:52,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017396496] [2021-08-06 19:34:52,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:34:52,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:52,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:34:52,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:34:52,799 INFO L87 Difference]: Start difference. First operand 4383 states and 7239 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:53,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:53,140 INFO L93 Difference]: Finished difference Result 5862 states and 9459 transitions. [2021-08-06 19:34:53,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:34:53,140 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:34:53,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:53,146 INFO L225 Difference]: With dead ends: 5862 [2021-08-06 19:34:53,147 INFO L226 Difference]: Without dead ends: 5817 [2021-08-06 19:34:53,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 163.7ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:34:53,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5817 states. [2021-08-06 19:34:53,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5817 to 4440. [2021-08-06 19:34:53,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4440 states, 4439 states have (on average 1.6573552601937374) internal successors, (7357), 4439 states have internal predecessors, (7357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:53,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4440 states to 4440 states and 7357 transitions. [2021-08-06 19:34:53,197 INFO L78 Accepts]: Start accepts. Automaton has 4440 states and 7357 transitions. Word has length 47 [2021-08-06 19:34:53,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:53,198 INFO L470 AbstractCegarLoop]: Abstraction has 4440 states and 7357 transitions. [2021-08-06 19:34:53,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:53,198 INFO L276 IsEmpty]: Start isEmpty. Operand 4440 states and 7357 transitions. [2021-08-06 19:34:53,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:34:53,201 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:53,201 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:53,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2021-08-06 19:34:53,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:53,402 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:53,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:53,402 INFO L82 PathProgramCache]: Analyzing trace with hash 120720606, now seen corresponding path program 117 times [2021-08-06 19:34:53,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:53,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515854356] [2021-08-06 19:34:53,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:53,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:53,544 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 22 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:53,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:53,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515854356] [2021-08-06 19:34:53,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515854356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:53,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566778268] [2021-08-06 19:34:53,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:34:53,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:53,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:53,545 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:53,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2021-08-06 19:34:57,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-06 19:34:57,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:57,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:34:57,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:57,743 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:34:57,744 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:34:57,824 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:34:57,824 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:34:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 25 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:57,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566778268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:57,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:57,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:34:57,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827027649] [2021-08-06 19:34:57,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:34:57,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:57,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:34:57,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:34:57,851 INFO L87 Difference]: Start difference. First operand 4440 states and 7357 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:58,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:58,003 INFO L93 Difference]: Finished difference Result 5129 states and 8267 transitions. [2021-08-06 19:34:58,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:34:58,003 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:34:58,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:58,008 INFO L225 Difference]: With dead ends: 5129 [2021-08-06 19:34:58,008 INFO L226 Difference]: Without dead ends: 5117 [2021-08-06 19:34:58,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:34:58,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-08-06 19:34:58,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4440. [2021-08-06 19:34:58,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4440 states, 4439 states have (on average 1.6571299842306826) internal successors, (7356), 4439 states have internal predecessors, (7356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:58,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4440 states to 4440 states and 7356 transitions. [2021-08-06 19:34:58,048 INFO L78 Accepts]: Start accepts. Automaton has 4440 states and 7356 transitions. Word has length 47 [2021-08-06 19:34:58,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:58,048 INFO L470 AbstractCegarLoop]: Abstraction has 4440 states and 7356 transitions. [2021-08-06 19:34:58,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:58,048 INFO L276 IsEmpty]: Start isEmpty. Operand 4440 states and 7356 transitions. [2021-08-06 19:34:58,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:34:58,051 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:58,051 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:58,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2021-08-06 19:34:58,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2021-08-06 19:34:58,251 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:58,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:58,252 INFO L82 PathProgramCache]: Analyzing trace with hash 984362763, now seen corresponding path program 118 times [2021-08-06 19:34:58,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:58,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927786603] [2021-08-06 19:34:58,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:58,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:58,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:34:58,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:58,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927786603] [2021-08-06 19:34:58,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927786603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:58,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226421370] [2021-08-06 19:34:58,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:34:58,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:58,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:58,440 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:58,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2021-08-06 19:35:02,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:35:02,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:02,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:35:02,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:02,841 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:35:02,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226421370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:02,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:02,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:35:02,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283537052] [2021-08-06 19:35:02,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:35:02,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:02,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:35:02,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:35:02,842 INFO L87 Difference]: Start difference. First operand 4440 states and 7356 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:03,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:03,331 INFO L93 Difference]: Finished difference Result 7292 states and 11666 transitions. [2021-08-06 19:35:03,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 19:35:03,331 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:35:03,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:03,338 INFO L225 Difference]: With dead ends: 7292 [2021-08-06 19:35:03,338 INFO L226 Difference]: Without dead ends: 7197 [2021-08-06 19:35:03,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 285.2ms TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:35:03,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7197 states. [2021-08-06 19:35:03,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7197 to 4598. [2021-08-06 19:35:03,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4597 states have (on average 1.663693713291277) internal successors, (7648), 4597 states have internal predecessors, (7648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:03,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 7648 transitions. [2021-08-06 19:35:03,387 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 7648 transitions. Word has length 47 [2021-08-06 19:35:03,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:03,387 INFO L470 AbstractCegarLoop]: Abstraction has 4598 states and 7648 transitions. [2021-08-06 19:35:03,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:03,387 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 7648 transitions. [2021-08-06 19:35:03,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:35:03,390 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:03,390 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:03,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2021-08-06 19:35:03,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:03,590 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:03,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:03,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1343722052, now seen corresponding path program 119 times [2021-08-06 19:35:03,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:03,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331663119] [2021-08-06 19:35:03,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:03,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:03,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 25 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:03,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:03,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331663119] [2021-08-06 19:35:03,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331663119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:03,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034832085] [2021-08-06 19:35:03,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:35:03,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:03,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:03,723 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:03,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2021-08-06 19:35:07,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-08-06 19:35:07,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:07,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:35:07,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:07,901 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:35:07,902 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:35:08,014 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:35:08,015 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:35:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:08,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034832085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:08,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:08,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-08-06 19:35:08,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146173800] [2021-08-06 19:35:08,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:35:08,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:08,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:35:08,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:35:08,041 INFO L87 Difference]: Start difference. First operand 4598 states and 7648 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:08,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:08,257 INFO L93 Difference]: Finished difference Result 5423 states and 8752 transitions. [2021-08-06 19:35:08,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:35:08,258 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:35:08,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:08,264 INFO L225 Difference]: With dead ends: 5423 [2021-08-06 19:35:08,264 INFO L226 Difference]: Without dead ends: 5405 [2021-08-06 19:35:08,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:35:08,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5405 states. [2021-08-06 19:35:08,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5405 to 4598. [2021-08-06 19:35:08,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4597 states have (on average 1.663476180117468) internal successors, (7647), 4597 states have internal predecessors, (7647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:08,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 7647 transitions. [2021-08-06 19:35:08,306 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 7647 transitions. Word has length 47 [2021-08-06 19:35:08,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:08,306 INFO L470 AbstractCegarLoop]: Abstraction has 4598 states and 7647 transitions. [2021-08-06 19:35:08,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:08,306 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 7647 transitions. [2021-08-06 19:35:08,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:35:08,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:08,309 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:08,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2021-08-06 19:35:08,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-08-06 19:35:08,510 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:08,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:08,510 INFO L82 PathProgramCache]: Analyzing trace with hash -2104695523, now seen corresponding path program 120 times [2021-08-06 19:35:08,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:08,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716066863] [2021-08-06 19:35:08,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:08,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:08,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:08,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:08,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716066863] [2021-08-06 19:35:08,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716066863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:08,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332199826] [2021-08-06 19:35:08,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:35:08,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:08,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:08,648 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:08,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2021-08-06 19:35:12,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-06 19:35:12,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:12,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:35:12,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:13,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332199826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:13,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:13,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:35:13,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588866073] [2021-08-06 19:35:13,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:35:13,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:13,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:35:13,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:35:13,115 INFO L87 Difference]: Start difference. First operand 4598 states and 7647 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:13,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:13,470 INFO L93 Difference]: Finished difference Result 6155 states and 9811 transitions. [2021-08-06 19:35:13,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:35:13,470 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:35:13,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:13,475 INFO L225 Difference]: With dead ends: 6155 [2021-08-06 19:35:13,475 INFO L226 Difference]: Without dead ends: 6025 [2021-08-06 19:35:13,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 195.9ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:35:13,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6025 states. [2021-08-06 19:35:13,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6025 to 4423. [2021-08-06 19:35:13,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 4422 states have (on average 1.647670737222976) internal successors, (7286), 4422 states have internal predecessors, (7286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:13,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 7286 transitions. [2021-08-06 19:35:13,517 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 7286 transitions. Word has length 47 [2021-08-06 19:35:13,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:13,517 INFO L470 AbstractCegarLoop]: Abstraction has 4423 states and 7286 transitions. [2021-08-06 19:35:13,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:13,517 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 7286 transitions. [2021-08-06 19:35:13,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:35:13,520 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:13,520 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:13,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2021-08-06 19:35:13,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-08-06 19:35:13,721 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:13,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:13,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1268064010, now seen corresponding path program 55 times [2021-08-06 19:35:13,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:13,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978479663] [2021-08-06 19:35:13,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:13,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:13,834 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 57 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:13,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:13,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978479663] [2021-08-06 19:35:13,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978479663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:13,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682828471] [2021-08-06 19:35:13,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:35:13,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:13,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:13,835 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:13,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2021-08-06 19:35:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:17,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:35:17,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:18,223 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:35:18,223 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:35:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 66 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:18,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682828471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:18,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:18,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 19:35:18,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249391911] [2021-08-06 19:35:18,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:35:18,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:18,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:35:18,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:35:18,240 INFO L87 Difference]: Start difference. First operand 4423 states and 7286 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:18,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:18,445 INFO L93 Difference]: Finished difference Result 6771 states and 10840 transitions. [2021-08-06 19:35:18,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:35:18,445 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:35:18,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:18,452 INFO L225 Difference]: With dead ends: 6771 [2021-08-06 19:35:18,453 INFO L226 Difference]: Without dead ends: 6771 [2021-08-06 19:35:18,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:35:18,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6771 states. [2021-08-06 19:35:18,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6771 to 4699. [2021-08-06 19:35:18,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4699 states, 4698 states have (on average 1.6562366964665816) internal successors, (7781), 4698 states have internal predecessors, (7781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:18,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4699 states to 4699 states and 7781 transitions. [2021-08-06 19:35:18,507 INFO L78 Accepts]: Start accepts. Automaton has 4699 states and 7781 transitions. Word has length 47 [2021-08-06 19:35:18,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:18,507 INFO L470 AbstractCegarLoop]: Abstraction has 4699 states and 7781 transitions. [2021-08-06 19:35:18,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:18,508 INFO L276 IsEmpty]: Start isEmpty. Operand 4699 states and 7781 transitions. [2021-08-06 19:35:18,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:35:18,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:18,511 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:18,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2021-08-06 19:35:18,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:18,713 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:18,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:18,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1913142902, now seen corresponding path program 56 times [2021-08-06 19:35:18,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:18,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992147793] [2021-08-06 19:35:18,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:18,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:18,840 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 55 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:18,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:18,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992147793] [2021-08-06 19:35:18,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992147793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:18,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648252501] [2021-08-06 19:35:18,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:35:18,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:18,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:18,841 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:18,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2021-08-06 19:35:22,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:35:22,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:22,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:35:22,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:23,316 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:35:23,316 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:35:23,333 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:23,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648252501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:23,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:23,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 19:35:23,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954462903] [2021-08-06 19:35:23,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:35:23,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:23,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:35:23,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:35:23,334 INFO L87 Difference]: Start difference. First operand 4699 states and 7781 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:23,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:23,575 INFO L93 Difference]: Finished difference Result 7185 states and 11499 transitions. [2021-08-06 19:35:23,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:35:23,575 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:35:23,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:23,583 INFO L225 Difference]: With dead ends: 7185 [2021-08-06 19:35:23,583 INFO L226 Difference]: Without dead ends: 7185 [2021-08-06 19:35:23,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 118.2ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:35:23,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7185 states. [2021-08-06 19:35:23,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7185 to 4721. [2021-08-06 19:35:23,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4721 states, 4720 states have (on average 1.6574152542372882) internal successors, (7823), 4720 states have internal predecessors, (7823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:23,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4721 states to 4721 states and 7823 transitions. [2021-08-06 19:35:23,638 INFO L78 Accepts]: Start accepts. Automaton has 4721 states and 7823 transitions. Word has length 47 [2021-08-06 19:35:23,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:23,638 INFO L470 AbstractCegarLoop]: Abstraction has 4721 states and 7823 transitions. [2021-08-06 19:35:23,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:23,638 INFO L276 IsEmpty]: Start isEmpty. Operand 4721 states and 7823 transitions. [2021-08-06 19:35:23,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:35:23,642 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:23,642 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:23,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2021-08-06 19:35:23,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:23,842 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:23,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:23,843 INFO L82 PathProgramCache]: Analyzing trace with hash 520235126, now seen corresponding path program 57 times [2021-08-06 19:35:23,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:23,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521699915] [2021-08-06 19:35:23,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:23,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:23,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:23,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:23,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521699915] [2021-08-06 19:35:23,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521699915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:23,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970035674] [2021-08-06 19:35:23,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:35:23,979 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:23,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:23,980 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:23,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2021-08-06 19:35:28,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-06 19:35:28,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:28,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:35:28,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:28,477 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:35:28,477 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:35:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:28,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970035674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:28,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:28,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:35:28,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688645269] [2021-08-06 19:35:28,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:35:28,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:28,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:35:28,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:35:28,495 INFO L87 Difference]: Start difference. First operand 4721 states and 7823 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:28,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:28,801 INFO L93 Difference]: Finished difference Result 6736 states and 10805 transitions. [2021-08-06 19:35:28,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:35:28,802 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:35:28,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:28,810 INFO L225 Difference]: With dead ends: 6736 [2021-08-06 19:35:28,810 INFO L226 Difference]: Without dead ends: 6736 [2021-08-06 19:35:28,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:35:28,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6736 states. [2021-08-06 19:35:28,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6736 to 4735. [2021-08-06 19:35:28,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4735 states, 4734 states have (on average 1.6571609632446134) internal successors, (7845), 4734 states have internal predecessors, (7845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:28,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4735 states to 4735 states and 7845 transitions. [2021-08-06 19:35:28,868 INFO L78 Accepts]: Start accepts. Automaton has 4735 states and 7845 transitions. Word has length 47 [2021-08-06 19:35:28,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:28,869 INFO L470 AbstractCegarLoop]: Abstraction has 4735 states and 7845 transitions. [2021-08-06 19:35:28,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:28,869 INFO L276 IsEmpty]: Start isEmpty. Operand 4735 states and 7845 transitions. [2021-08-06 19:35:28,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:35:28,872 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:28,872 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:28,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2021-08-06 19:35:29,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-08-06 19:35:29,080 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:29,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:29,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1467921910, now seen corresponding path program 58 times [2021-08-06 19:35:29,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:29,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753681489] [2021-08-06 19:35:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:29,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 51 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:29,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:29,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753681489] [2021-08-06 19:35:29,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753681489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:29,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688009516] [2021-08-06 19:35:29,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:35:29,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:29,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:29,278 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:29,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2021-08-06 19:35:33,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:35:33,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:33,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:35:33,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:33,814 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:35:33,814 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:35:33,831 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 51 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:33,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688009516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:33,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:33,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:35:33,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222588833] [2021-08-06 19:35:33,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:35:33,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:33,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:35:33,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:35:33,832 INFO L87 Difference]: Start difference. First operand 4735 states and 7845 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:34,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:34,113 INFO L93 Difference]: Finished difference Result 5839 states and 9409 transitions. [2021-08-06 19:35:34,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:35:34,113 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:35:34,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:34,119 INFO L225 Difference]: With dead ends: 5839 [2021-08-06 19:35:34,120 INFO L226 Difference]: Without dead ends: 5839 [2021-08-06 19:35:34,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:35:34,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5839 states. [2021-08-06 19:35:34,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5839 to 4610. [2021-08-06 19:35:34,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 1.656107615534823) internal successors, (7633), 4609 states have internal predecessors, (7633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:34,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 7633 transitions. [2021-08-06 19:35:34,177 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 7633 transitions. Word has length 47 [2021-08-06 19:35:34,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:34,178 INFO L470 AbstractCegarLoop]: Abstraction has 4610 states and 7633 transitions. [2021-08-06 19:35:34,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:34,178 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 7633 transitions. [2021-08-06 19:35:34,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:35:34,181 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:34,181 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:34,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2021-08-06 19:35:34,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:34,382 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:34,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:34,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1572227870, now seen corresponding path program 121 times [2021-08-06 19:35:34,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:34,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974979044] [2021-08-06 19:35:34,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:34,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 35 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:34,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:34,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974979044] [2021-08-06 19:35:34,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974979044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:34,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077182687] [2021-08-06 19:35:34,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:35:34,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:34,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:34,532 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:34,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2021-08-06 19:35:38,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:38,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:35:38,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:38,963 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:35:38,964 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:35:39,103 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:35:39,103 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:35:39,129 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 38 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:39,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077182687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:39,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:39,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:35:39,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024384826] [2021-08-06 19:35:39,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:35:39,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:39,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:35:39,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:35:39,130 INFO L87 Difference]: Start difference. First operand 4610 states and 7633 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:39,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:39,310 INFO L93 Difference]: Finished difference Result 5224 states and 8442 transitions. [2021-08-06 19:35:39,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:35:39,311 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:35:39,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:39,316 INFO L225 Difference]: With dead ends: 5224 [2021-08-06 19:35:39,317 INFO L226 Difference]: Without dead ends: 5200 [2021-08-06 19:35:39,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:35:39,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5200 states. [2021-08-06 19:35:39,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5200 to 4604. [2021-08-06 19:35:39,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4604 states, 4603 states have (on average 1.6565283510753857) internal successors, (7625), 4603 states have internal predecessors, (7625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:39,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4604 states to 4604 states and 7625 transitions. [2021-08-06 19:35:39,370 INFO L78 Accepts]: Start accepts. Automaton has 4604 states and 7625 transitions. Word has length 47 [2021-08-06 19:35:39,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:39,370 INFO L470 AbstractCegarLoop]: Abstraction has 4604 states and 7625 transitions. [2021-08-06 19:35:39,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:39,370 INFO L276 IsEmpty]: Start isEmpty. Operand 4604 states and 7625 transitions. [2021-08-06 19:35:39,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:35:39,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:39,373 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:39,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2021-08-06 19:35:39,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:39,574 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:39,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:39,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1875796241, now seen corresponding path program 122 times [2021-08-06 19:35:39,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:39,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704974964] [2021-08-06 19:35:39,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:39,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:39,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:35:39,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:39,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704974964] [2021-08-06 19:35:39,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704974964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:39,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404432506] [2021-08-06 19:35:39,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:35:39,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:39,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:39,701 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:39,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2021-08-06 19:35:43,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:35:43,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:43,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:35:43,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:44,208 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:35:44,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404432506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:44,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:44,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:35:44,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456736386] [2021-08-06 19:35:44,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:35:44,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:44,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:35:44,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:35:44,208 INFO L87 Difference]: Start difference. First operand 4604 states and 7625 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:44,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:44,622 INFO L93 Difference]: Finished difference Result 5917 states and 9602 transitions. [2021-08-06 19:35:44,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:35:44,622 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:35:44,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:44,629 INFO L225 Difference]: With dead ends: 5917 [2021-08-06 19:35:44,629 INFO L226 Difference]: Without dead ends: 5872 [2021-08-06 19:35:44,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 177.6ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:35:44,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5872 states. [2021-08-06 19:35:44,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5872 to 4673. [2021-08-06 19:35:44,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4673 states, 4672 states have (on average 1.6630993150684932) internal successors, (7770), 4672 states have internal predecessors, (7770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:44,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4673 states to 4673 states and 7770 transitions. [2021-08-06 19:35:44,723 INFO L78 Accepts]: Start accepts. Automaton has 4673 states and 7770 transitions. Word has length 47 [2021-08-06 19:35:44,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:44,723 INFO L470 AbstractCegarLoop]: Abstraction has 4673 states and 7770 transitions. [2021-08-06 19:35:44,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:44,723 INFO L276 IsEmpty]: Start isEmpty. Operand 4673 states and 7770 transitions. [2021-08-06 19:35:44,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:35:44,727 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:44,727 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:44,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2021-08-06 19:35:44,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:44,927 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:44,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:44,928 INFO L82 PathProgramCache]: Analyzing trace with hash 264303133, now seen corresponding path program 123 times [2021-08-06 19:35:44,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:44,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763781071] [2021-08-06 19:35:44,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:44,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:35:45,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:45,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763781071] [2021-08-06 19:35:45,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763781071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:45,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422684571] [2021-08-06 19:35:45,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:35:45,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:45,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:45,059 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:45,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2021-08-06 19:35:49,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-06 19:35:49,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:49,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:35:49,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:35:49,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422684571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:49,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:49,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:35:49,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960325937] [2021-08-06 19:35:49,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:35:49,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:49,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:35:49,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:35:49,603 INFO L87 Difference]: Start difference. First operand 4673 states and 7770 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:50,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:50,231 INFO L93 Difference]: Finished difference Result 7977 states and 12804 transitions. [2021-08-06 19:35:50,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 19:35:50,231 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:35:50,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:50,241 INFO L225 Difference]: With dead ends: 7977 [2021-08-06 19:35:50,241 INFO L226 Difference]: Without dead ends: 7827 [2021-08-06 19:35:50,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 334.0ms TimeCoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 19:35:50,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7827 states. [2021-08-06 19:35:50,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7827 to 4873. [2021-08-06 19:35:50,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4873 states, 4872 states have (on average 1.6713875205254516) internal successors, (8143), 4872 states have internal predecessors, (8143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:50,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4873 states to 4873 states and 8143 transitions. [2021-08-06 19:35:50,359 INFO L78 Accepts]: Start accepts. Automaton has 4873 states and 8143 transitions. Word has length 47 [2021-08-06 19:35:50,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:50,360 INFO L470 AbstractCegarLoop]: Abstraction has 4873 states and 8143 transitions. [2021-08-06 19:35:50,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:50,360 INFO L276 IsEmpty]: Start isEmpty. Operand 4873 states and 8143 transitions. [2021-08-06 19:35:50,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:35:50,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:50,363 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:50,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2021-08-06 19:35:50,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:50,564 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:50,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:50,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1470212143, now seen corresponding path program 124 times [2021-08-06 19:35:50,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:50,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057379001] [2021-08-06 19:35:50,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:50,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:50,699 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:35:50,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:50,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057379001] [2021-08-06 19:35:50,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057379001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:50,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865542151] [2021-08-06 19:35:50,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:35:50,700 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:50,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:50,701 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:50,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2021-08-06 19:35:54,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:35:54,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:54,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:35:54,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:35:55,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865542151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:55,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:55,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:35:55,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422141899] [2021-08-06 19:35:55,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:35:55,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:55,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:35:55,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:35:55,184 INFO L87 Difference]: Start difference. First operand 4873 states and 8143 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:56,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:56,141 INFO L93 Difference]: Finished difference Result 9652 states and 15485 transitions. [2021-08-06 19:35:56,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-06 19:35:56,141 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:35:56,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:56,151 INFO L225 Difference]: With dead ends: 9652 [2021-08-06 19:35:56,151 INFO L226 Difference]: Without dead ends: 9422 [2021-08-06 19:35:56,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 611.3ms TimeCoverageRelationStatistics Valid=489, Invalid=3671, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 19:35:56,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9422 states. [2021-08-06 19:35:56,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9422 to 5264. [2021-08-06 19:35:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5264 states, 5263 states have (on average 1.6815504465133955) internal successors, (8850), 5263 states have internal predecessors, (8850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:56,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5264 states to 5264 states and 8850 transitions. [2021-08-06 19:35:56,214 INFO L78 Accepts]: Start accepts. Automaton has 5264 states and 8850 transitions. Word has length 47 [2021-08-06 19:35:56,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:56,215 INFO L470 AbstractCegarLoop]: Abstraction has 5264 states and 8850 transitions. [2021-08-06 19:35:56,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:56,215 INFO L276 IsEmpty]: Start isEmpty. Operand 5264 states and 8850 transitions. [2021-08-06 19:35:56,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:35:56,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:56,218 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:56,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2021-08-06 19:35:56,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:56,419 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:56,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:56,419 INFO L82 PathProgramCache]: Analyzing trace with hash -695901987, now seen corresponding path program 125 times [2021-08-06 19:35:56,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:56,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076627080] [2021-08-06 19:35:56,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:56,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:56,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:56,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076627080] [2021-08-06 19:35:56,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076627080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:56,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107320000] [2021-08-06 19:35:56,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:35:56,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:56,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:56,559 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:56,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2021-08-06 19:36:00,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-06 19:36:00,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:00,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:36:00,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:01,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107320000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:01,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:01,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:36:01,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835317142] [2021-08-06 19:36:01,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:36:01,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:01,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:36:01,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:36:01,214 INFO L87 Difference]: Start difference. First operand 5264 states and 8850 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:01,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:01,672 INFO L93 Difference]: Finished difference Result 7364 states and 11678 transitions. [2021-08-06 19:36:01,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:36:01,673 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:36:01,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:01,680 INFO L225 Difference]: With dead ends: 7364 [2021-08-06 19:36:01,680 INFO L226 Difference]: Without dead ends: 7049 [2021-08-06 19:36:01,680 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 246.3ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:36:01,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7049 states. [2021-08-06 19:36:01,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7049 to 4540. [2021-08-06 19:36:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4540 states, 4539 states have (on average 1.6543291473892927) internal successors, (7509), 4539 states have internal predecessors, (7509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:01,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4540 states to 4540 states and 7509 transitions. [2021-08-06 19:36:01,731 INFO L78 Accepts]: Start accepts. Automaton has 4540 states and 7509 transitions. Word has length 47 [2021-08-06 19:36:01,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:01,731 INFO L470 AbstractCegarLoop]: Abstraction has 4540 states and 7509 transitions. [2021-08-06 19:36:01,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:01,732 INFO L276 IsEmpty]: Start isEmpty. Operand 4540 states and 7509 transitions. [2021-08-06 19:36:01,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-06 19:36:01,735 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:01,735 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:01,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2021-08-06 19:36:01,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:01,935 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:01,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:01,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1569228504, now seen corresponding path program 59 times [2021-08-06 19:36:01,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:01,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631855378] [2021-08-06 19:36:01,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:01,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:02,035 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:36:02,036 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:36:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:36:02,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:02,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631855378] [2021-08-06 19:36:02,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631855378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:02,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067978282] [2021-08-06 19:36:02,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:36:02,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:02,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:02,043 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:02,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2021-08-06 19:36:06,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 19:36:06,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:06,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 19:36:06,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:06,684 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:36:06,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067978282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:06,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:06,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-06 19:36:06,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839207839] [2021-08-06 19:36:06,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:36:06,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:06,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:36:06,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:36:06,685 INFO L87 Difference]: Start difference. First operand 4540 states and 7509 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:06,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:06,920 INFO L93 Difference]: Finished difference Result 5770 states and 9375 transitions. [2021-08-06 19:36:06,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:36:06,921 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-06 19:36:06,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:06,927 INFO L225 Difference]: With dead ends: 5770 [2021-08-06 19:36:06,927 INFO L226 Difference]: Without dead ends: 5751 [2021-08-06 19:36:06,927 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:36:06,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5751 states. [2021-08-06 19:36:06,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5751 to 5416. [2021-08-06 19:36:06,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5416 states, 5415 states have (on average 1.6454293628808865) internal successors, (8910), 5415 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:06,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5416 states to 5416 states and 8910 transitions. [2021-08-06 19:36:06,976 INFO L78 Accepts]: Start accepts. Automaton has 5416 states and 8910 transitions. Word has length 50 [2021-08-06 19:36:06,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:06,976 INFO L470 AbstractCegarLoop]: Abstraction has 5416 states and 8910 transitions. [2021-08-06 19:36:06,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:06,976 INFO L276 IsEmpty]: Start isEmpty. Operand 5416 states and 8910 transitions. [2021-08-06 19:36:06,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-06 19:36:06,980 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:06,980 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:07,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2021-08-06 19:36:07,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-08-06 19:36:07,181 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:07,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:07,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2086183647, now seen corresponding path program 126 times [2021-08-06 19:36:07,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:07,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761501492] [2021-08-06 19:36:07,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:07,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:07,283 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:36:07,284 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:36:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:36:07,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:07,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761501492] [2021-08-06 19:36:07,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761501492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:07,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687122554] [2021-08-06 19:36:07,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:36:07,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:07,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:07,291 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:07,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2021-08-06 19:36:11,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-06 19:36:11,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:11,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 19:36:11,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:12,010 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:36:12,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687122554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:12,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:12,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-06 19:36:12,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130916077] [2021-08-06 19:36:12,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:36:12,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:12,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:36:12,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:36:12,011 INFO L87 Difference]: Start difference. First operand 5416 states and 8910 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:12,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:12,246 INFO L93 Difference]: Finished difference Result 6279 states and 10173 transitions. [2021-08-06 19:36:12,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:36:12,246 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-06 19:36:12,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:12,252 INFO L225 Difference]: With dead ends: 6279 [2021-08-06 19:36:12,252 INFO L226 Difference]: Without dead ends: 6256 [2021-08-06 19:36:12,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:36:12,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6256 states. [2021-08-06 19:36:12,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6256 to 5657. [2021-08-06 19:36:12,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5657 states, 5656 states have (on average 1.6476308345120225) internal successors, (9319), 5656 states have internal predecessors, (9319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:12,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5657 states to 5657 states and 9319 transitions. [2021-08-06 19:36:12,303 INFO L78 Accepts]: Start accepts. Automaton has 5657 states and 9319 transitions. Word has length 50 [2021-08-06 19:36:12,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:12,303 INFO L470 AbstractCegarLoop]: Abstraction has 5657 states and 9319 transitions. [2021-08-06 19:36:12,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:12,303 INFO L276 IsEmpty]: Start isEmpty. Operand 5657 states and 9319 transitions. [2021-08-06 19:36:12,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-06 19:36:12,307 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:12,307 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:12,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2021-08-06 19:36:12,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-08-06 19:36:12,507 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:12,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:12,508 INFO L82 PathProgramCache]: Analyzing trace with hash 437625971, now seen corresponding path program 127 times [2021-08-06 19:36:12,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:12,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859321991] [2021-08-06 19:36:12,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:12,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:12,607 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:36:12,608 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:36:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:36:12,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:12,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859321991] [2021-08-06 19:36:12,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859321991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:12,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305272395] [2021-08-06 19:36:12,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:36:12,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:12,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:12,614 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:12,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2021-08-06 19:36:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:17,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 19:36:17,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:36:17,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305272395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:17,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:17,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-06 19:36:17,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295556391] [2021-08-06 19:36:17,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:36:17,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:17,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:36:17,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:36:17,378 INFO L87 Difference]: Start difference. First operand 5657 states and 9319 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:17,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:17,614 INFO L93 Difference]: Finished difference Result 6293 states and 10214 transitions. [2021-08-06 19:36:17,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:36:17,614 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-06 19:36:17,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:17,621 INFO L225 Difference]: With dead ends: 6293 [2021-08-06 19:36:17,621 INFO L226 Difference]: Without dead ends: 6274 [2021-08-06 19:36:17,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:36:17,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6274 states. [2021-08-06 19:36:17,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6274 to 5771. [2021-08-06 19:36:17,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5771 states, 5770 states have (on average 1.6454072790294627) internal successors, (9494), 5770 states have internal predecessors, (9494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:17,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5771 states to 5771 states and 9494 transitions. [2021-08-06 19:36:17,677 INFO L78 Accepts]: Start accepts. Automaton has 5771 states and 9494 transitions. Word has length 50 [2021-08-06 19:36:17,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:17,678 INFO L470 AbstractCegarLoop]: Abstraction has 5771 states and 9494 transitions. [2021-08-06 19:36:17,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:17,678 INFO L276 IsEmpty]: Start isEmpty. Operand 5771 states and 9494 transitions. [2021-08-06 19:36:17,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-06 19:36:17,683 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:17,683 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:17,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2021-08-06 19:36:17,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-08-06 19:36:17,883 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:17,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:17,883 INFO L82 PathProgramCache]: Analyzing trace with hash -447527967, now seen corresponding path program 128 times [2021-08-06 19:36:17,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:17,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226668637] [2021-08-06 19:36:17,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:17,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:17,983 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:36:17,984 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:36:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:36:17,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:17,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226668637] [2021-08-06 19:36:17,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226668637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:17,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562479656] [2021-08-06 19:36:17,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:36:17,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:17,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:17,991 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:17,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2021-08-06 19:36:22,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:36:22,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:22,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 19:36:22,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:36:22,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562479656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:22,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:22,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-06 19:36:22,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990571808] [2021-08-06 19:36:22,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:36:22,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:22,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:36:22,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:36:22,698 INFO L87 Difference]: Start difference. First operand 5771 states and 9494 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:22,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:22,942 INFO L93 Difference]: Finished difference Result 6351 states and 10319 transitions. [2021-08-06 19:36:22,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:36:22,942 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-06 19:36:22,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:22,949 INFO L225 Difference]: With dead ends: 6351 [2021-08-06 19:36:22,949 INFO L226 Difference]: Without dead ends: 6328 [2021-08-06 19:36:22,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:36:22,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6328 states. [2021-08-06 19:36:22,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6328 to 5821. [2021-08-06 19:36:22,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 1.6446735395189003) internal successors, (9572), 5820 states have internal predecessors, (9572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:23,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 9572 transitions. [2021-08-06 19:36:23,001 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 9572 transitions. Word has length 50 [2021-08-06 19:36:23,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:23,001 INFO L470 AbstractCegarLoop]: Abstraction has 5821 states and 9572 transitions. [2021-08-06 19:36:23,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:23,001 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 9572 transitions. [2021-08-06 19:36:23,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-06 19:36:23,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:23,005 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:23,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2021-08-06 19:36:23,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-08-06 19:36:23,205 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:23,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:23,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1030702515, now seen corresponding path program 129 times [2021-08-06 19:36:23,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:23,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344327985] [2021-08-06 19:36:23,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:23,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:23,306 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:36:23,307 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:36:23,312 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:36:23,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:23,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344327985] [2021-08-06 19:36:23,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344327985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:23,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297708077] [2021-08-06 19:36:23,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:36:23,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:23,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:23,313 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:23,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2021-08-06 19:36:27,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-08-06 19:36:27,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:27,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 19:36:27,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:36:28,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297708077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:28,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:28,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-06 19:36:28,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2579340] [2021-08-06 19:36:28,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:36:28,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:28,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:36:28,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:36:28,125 INFO L87 Difference]: Start difference. First operand 5821 states and 9572 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:28,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:28,368 INFO L93 Difference]: Finished difference Result 6396 states and 10400 transitions. [2021-08-06 19:36:28,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:36:28,368 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-06 19:36:28,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:28,375 INFO L225 Difference]: With dead ends: 6396 [2021-08-06 19:36:28,375 INFO L226 Difference]: Without dead ends: 6373 [2021-08-06 19:36:28,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:36:28,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6373 states. [2021-08-06 19:36:28,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6373 to 5896. [2021-08-06 19:36:28,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5896 states, 5895 states have (on average 1.6439355385920271) internal successors, (9691), 5895 states have internal predecessors, (9691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:28,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5896 states to 5896 states and 9691 transitions. [2021-08-06 19:36:28,432 INFO L78 Accepts]: Start accepts. Automaton has 5896 states and 9691 transitions. Word has length 50 [2021-08-06 19:36:28,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:28,433 INFO L470 AbstractCegarLoop]: Abstraction has 5896 states and 9691 transitions. [2021-08-06 19:36:28,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:28,433 INFO L276 IsEmpty]: Start isEmpty. Operand 5896 states and 9691 transitions. [2021-08-06 19:36:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-06 19:36:28,437 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:28,437 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:28,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2021-08-06 19:36:28,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:28,638 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:28,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:28,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1599661407, now seen corresponding path program 130 times [2021-08-06 19:36:28,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:28,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843234246] [2021-08-06 19:36:28,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:28,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:28,768 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:36:28,769 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:36:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:36:28,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:28,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843234246] [2021-08-06 19:36:28,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843234246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:28,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462677435] [2021-08-06 19:36:28,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:36:28,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:28,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:28,775 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:28,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2021-08-06 19:36:33,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:36:33,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:33,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:36:33,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:33,806 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:36:33,807 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:36:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 58 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:33,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462677435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:33,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:33,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 21 [2021-08-06 19:36:33,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586160839] [2021-08-06 19:36:33,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:36:33,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:33,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:36:33,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:36:33,830 INFO L87 Difference]: Start difference. First operand 5896 states and 9691 transitions. Second operand has 22 states, 22 states have (on average 4.5) internal successors, (99), 21 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:34,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:34,942 INFO L93 Difference]: Finished difference Result 7203 states and 11565 transitions. [2021-08-06 19:36:34,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 19:36:34,942 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.5) internal successors, (99), 21 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-06 19:36:34,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:34,951 INFO L225 Difference]: With dead ends: 7203 [2021-08-06 19:36:34,951 INFO L226 Difference]: Without dead ends: 7172 [2021-08-06 19:36:34,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 579.1ms TimeCoverageRelationStatistics Valid=535, Invalid=2117, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 19:36:34,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7172 states. [2021-08-06 19:36:35,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7172 to 5997. [2021-08-06 19:36:35,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5997 states, 5996 states have (on average 1.6469312875250166) internal successors, (9875), 5996 states have internal predecessors, (9875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:35,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5997 states to 5997 states and 9875 transitions. [2021-08-06 19:36:35,023 INFO L78 Accepts]: Start accepts. Automaton has 5997 states and 9875 transitions. Word has length 50 [2021-08-06 19:36:35,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:35,023 INFO L470 AbstractCegarLoop]: Abstraction has 5997 states and 9875 transitions. [2021-08-06 19:36:35,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.5) internal successors, (99), 21 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:35,023 INFO L276 IsEmpty]: Start isEmpty. Operand 5997 states and 9875 transitions. [2021-08-06 19:36:35,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-06 19:36:35,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:35,028 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:35,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2021-08-06 19:36:35,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-08-06 19:36:35,228 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:35,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:35,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1092946189, now seen corresponding path program 131 times [2021-08-06 19:36:35,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:35,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339101357] [2021-08-06 19:36:35,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:35,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:35,365 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:36:35,366 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:36:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:36:35,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:35,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339101357] [2021-08-06 19:36:35,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339101357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:35,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656591050] [2021-08-06 19:36:35,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:36:35,372 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:35,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:35,373 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:35,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2021-08-06 19:36:39,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 19:36:39,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:39,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:36:39,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:40,362 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:36:40,362 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 5.9 percent of original size [2021-08-06 19:36:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 58 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:40,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656591050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:40,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:40,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 16] total 23 [2021-08-06 19:36:40,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33146259] [2021-08-06 19:36:40,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:36:40,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:40,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:36:40,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:36:40,386 INFO L87 Difference]: Start difference. First operand 5997 states and 9875 transitions. Second operand has 24 states, 24 states have (on average 4.125) internal successors, (99), 23 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:41,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:41,669 INFO L93 Difference]: Finished difference Result 7748 states and 12566 transitions. [2021-08-06 19:36:41,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 19:36:41,669 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 23 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-06 19:36:41,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:41,677 INFO L225 Difference]: With dead ends: 7748 [2021-08-06 19:36:41,678 INFO L226 Difference]: Without dead ends: 7729 [2021-08-06 19:36:41,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 776.4ms TimeCoverageRelationStatistics Valid=855, Invalid=3435, Unknown=0, NotChecked=0, Total=4290 [2021-08-06 19:36:41,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7729 states. [2021-08-06 19:36:41,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7729 to 6468. [2021-08-06 19:36:41,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6468 states, 6467 states have (on average 1.6502242152466369) internal successors, (10672), 6467 states have internal predecessors, (10672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:41,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6468 states to 6468 states and 10672 transitions. [2021-08-06 19:36:41,756 INFO L78 Accepts]: Start accepts. Automaton has 6468 states and 10672 transitions. Word has length 50 [2021-08-06 19:36:41,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:41,756 INFO L470 AbstractCegarLoop]: Abstraction has 6468 states and 10672 transitions. [2021-08-06 19:36:41,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 23 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:41,756 INFO L276 IsEmpty]: Start isEmpty. Operand 6468 states and 10672 transitions. [2021-08-06 19:36:41,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:36:41,760 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:41,760 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:41,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2021-08-06 19:36:41,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-08-06 19:36:41,961 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:41,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:41,961 INFO L82 PathProgramCache]: Analyzing trace with hash -85524355, now seen corresponding path program 60 times [2021-08-06 19:36:41,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:41,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990554575] [2021-08-06 19:36:41,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:41,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:42,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:42,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990554575] [2021-08-06 19:36:42,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990554575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:42,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708492312] [2021-08-06 19:36:42,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:36:42,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:42,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:42,207 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:42,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2021-08-06 19:36:46,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-06 19:36:46,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:46,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:36:46,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:47,204 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:36:47,205 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:36:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 70 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:47,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708492312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:47,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:47,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-08-06 19:36:47,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270189191] [2021-08-06 19:36:47,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 19:36:47,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:47,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 19:36:47,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:36:47,224 INFO L87 Difference]: Start difference. First operand 6468 states and 10672 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:48,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:48,125 INFO L93 Difference]: Finished difference Result 8276 states and 13373 transitions. [2021-08-06 19:36:48,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 19:36:48,125 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 19:36:48,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:48,136 INFO L225 Difference]: With dead ends: 8276 [2021-08-06 19:36:48,136 INFO L226 Difference]: Without dead ends: 8276 [2021-08-06 19:36:48,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 627.3ms TimeCoverageRelationStatistics Valid=755, Invalid=2215, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 19:36:48,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8276 states. [2021-08-06 19:36:48,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8276 to 6527. [2021-08-06 19:36:48,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6527 states, 6526 states have (on average 1.6472571253447748) internal successors, (10750), 6526 states have internal predecessors, (10750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:48,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6527 states to 6527 states and 10750 transitions. [2021-08-06 19:36:48,203 INFO L78 Accepts]: Start accepts. Automaton has 6527 states and 10750 transitions. Word has length 53 [2021-08-06 19:36:48,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:48,204 INFO L470 AbstractCegarLoop]: Abstraction has 6527 states and 10750 transitions. [2021-08-06 19:36:48,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:48,204 INFO L276 IsEmpty]: Start isEmpty. Operand 6527 states and 10750 transitions. [2021-08-06 19:36:48,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:36:48,209 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:48,209 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:48,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2021-08-06 19:36:48,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:48,409 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:48,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:48,409 INFO L82 PathProgramCache]: Analyzing trace with hash -402023800, now seen corresponding path program 132 times [2021-08-06 19:36:48,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:48,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045446640] [2021-08-06 19:36:48,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:48,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:48,606 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:48,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:48,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045446640] [2021-08-06 19:36:48,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045446640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:48,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206965362] [2021-08-06 19:36:48,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:36:48,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:48,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:48,608 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:48,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2021-08-06 19:36:53,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 19:36:53,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:53,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 19:36:53,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:53,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206965362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:53,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:53,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-08-06 19:36:53,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525923944] [2021-08-06 19:36:53,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:36:53,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:53,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:36:53,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:36:53,505 INFO L87 Difference]: Start difference. First operand 6527 states and 10750 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:54,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:54,780 INFO L93 Difference]: Finished difference Result 9143 states and 14372 transitions. [2021-08-06 19:36:54,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 19:36:54,781 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 19:36:54,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:54,792 INFO L225 Difference]: With dead ends: 9143 [2021-08-06 19:36:54,792 INFO L226 Difference]: Without dead ends: 9086 [2021-08-06 19:36:54,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 796.5ms TimeCoverageRelationStatistics Valid=424, Invalid=2882, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 19:36:54,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9086 states. [2021-08-06 19:36:54,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9086 to 6536. [2021-08-06 19:36:54,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6536 states, 6535 states have (on average 1.6433052792654934) internal successors, (10739), 6535 states have internal predecessors, (10739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:54,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 10739 transitions. [2021-08-06 19:36:54,870 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 10739 transitions. Word has length 53 [2021-08-06 19:36:54,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:54,870 INFO L470 AbstractCegarLoop]: Abstraction has 6536 states and 10739 transitions. [2021-08-06 19:36:54,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:54,871 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 10739 transitions. [2021-08-06 19:36:54,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:36:54,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:54,875 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:54,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2021-08-06 19:36:55,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:55,076 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:55,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:55,076 INFO L82 PathProgramCache]: Analyzing trace with hash -57359736, now seen corresponding path program 61 times [2021-08-06 19:36:55,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:55,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479906160] [2021-08-06 19:36:55,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:55,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:55,282 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:36:55,285 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:36:55,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:36:55,312 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:36:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:55,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:55,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479906160] [2021-08-06 19:36:55,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479906160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:55,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4460754] [2021-08-06 19:36:55,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:36:55,317 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:55,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:55,318 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:55,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2021-08-06 19:36:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:59,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 19:36:59,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:00,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4460754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:00,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:00,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2021-08-06 19:37:00,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323432901] [2021-08-06 19:37:00,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:37:00,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:00,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:37:00,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=791, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:37:00,353 INFO L87 Difference]: Start difference. First operand 6536 states and 10739 transitions. Second operand has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 29 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:01,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:01,245 INFO L93 Difference]: Finished difference Result 6872 states and 11166 transitions. [2021-08-06 19:37:01,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:37:01,245 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 29 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 19:37:01,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:01,253 INFO L225 Difference]: With dead ends: 6872 [2021-08-06 19:37:01,253 INFO L226 Difference]: Without dead ends: 6682 [2021-08-06 19:37:01,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 360.2ms TimeCoverageRelationStatistics Valid=84, Invalid=846, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:37:01,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6682 states. [2021-08-06 19:37:01,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6682 to 6518. [2021-08-06 19:37:01,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6518 states, 6517 states have (on average 1.6403253030535523) internal successors, (10690), 6517 states have internal predecessors, (10690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:01,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6518 states to 6518 states and 10690 transitions. [2021-08-06 19:37:01,313 INFO L78 Accepts]: Start accepts. Automaton has 6518 states and 10690 transitions. Word has length 53 [2021-08-06 19:37:01,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:01,313 INFO L470 AbstractCegarLoop]: Abstraction has 6518 states and 10690 transitions. [2021-08-06 19:37:01,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 29 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:01,313 INFO L276 IsEmpty]: Start isEmpty. Operand 6518 states and 10690 transitions. [2021-08-06 19:37:01,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:37:01,318 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:01,318 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:01,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2021-08-06 19:37:01,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-08-06 19:37:01,518 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:01,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:01,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1016208605, now seen corresponding path program 133 times [2021-08-06 19:37:01,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:01,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333058407] [2021-08-06 19:37:01,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:01,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:01,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:01,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333058407] [2021-08-06 19:37:01,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333058407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:01,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74525420] [2021-08-06 19:37:01,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:37:01,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:01,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:01,649 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:01,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2021-08-06 19:37:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:06,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:37:06,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:06,615 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:37:06,615 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:37:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:06,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74525420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:06,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:06,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:37:06,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548297216] [2021-08-06 19:37:06,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:37:06,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:06,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:37:06,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:37:06,639 INFO L87 Difference]: Start difference. First operand 6518 states and 10690 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:06,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:06,795 INFO L93 Difference]: Finished difference Result 8889 states and 14231 transitions. [2021-08-06 19:37:06,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:37:06,795 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 19:37:06,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:06,804 INFO L225 Difference]: With dead ends: 8889 [2021-08-06 19:37:06,804 INFO L226 Difference]: Without dead ends: 8889 [2021-08-06 19:37:06,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:37:06,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8889 states. [2021-08-06 19:37:06,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8889 to 7133. [2021-08-06 19:37:06,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7133 states, 7132 states have (on average 1.6545148625911386) internal successors, (11800), 7132 states have internal predecessors, (11800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:06,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7133 states to 7133 states and 11800 transitions. [2021-08-06 19:37:06,879 INFO L78 Accepts]: Start accepts. Automaton has 7133 states and 11800 transitions. Word has length 53 [2021-08-06 19:37:06,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:06,879 INFO L470 AbstractCegarLoop]: Abstraction has 7133 states and 11800 transitions. [2021-08-06 19:37:06,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:06,879 INFO L276 IsEmpty]: Start isEmpty. Operand 7133 states and 11800 transitions. [2021-08-06 19:37:06,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:37:06,884 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:06,884 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:06,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2021-08-06 19:37:07,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-08-06 19:37:07,085 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:07,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:07,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1852840118, now seen corresponding path program 62 times [2021-08-06 19:37:07,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:07,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872942579] [2021-08-06 19:37:07,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:07,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:07,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:07,268 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:37:07,269 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:37:07,287 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:37:07,289 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:37:07,326 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:07,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:07,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872942579] [2021-08-06 19:37:07,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872942579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:07,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700128751] [2021-08-06 19:37:07,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:37:07,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:07,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:07,328 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:07,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2021-08-06 19:37:11,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:37:11,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:11,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 19:37:11,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:12,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700128751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:12,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:12,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 18 [2021-08-06 19:37:12,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922562604] [2021-08-06 19:37:12,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:37:12,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:12,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:37:12,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:37:12,410 INFO L87 Difference]: Start difference. First operand 7133 states and 11800 transitions. Second operand has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:13,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:13,208 INFO L93 Difference]: Finished difference Result 8674 states and 14046 transitions. [2021-08-06 19:37:13,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 19:37:13,208 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 19:37:13,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:13,219 INFO L225 Difference]: With dead ends: 8674 [2021-08-06 19:37:13,219 INFO L226 Difference]: Without dead ends: 8635 [2021-08-06 19:37:13,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 336.7ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:37:13,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8635 states. [2021-08-06 19:37:13,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8635 to 7704. [2021-08-06 19:37:13,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7704 states, 7703 states have (on average 1.6502661300791899) internal successors, (12712), 7703 states have internal predecessors, (12712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:13,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7704 states to 7704 states and 12712 transitions. [2021-08-06 19:37:13,309 INFO L78 Accepts]: Start accepts. Automaton has 7704 states and 12712 transitions. Word has length 53 [2021-08-06 19:37:13,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:13,309 INFO L470 AbstractCegarLoop]: Abstraction has 7704 states and 12712 transitions. [2021-08-06 19:37:13,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:13,309 INFO L276 IsEmpty]: Start isEmpty. Operand 7704 states and 12712 transitions. [2021-08-06 19:37:13,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:37:13,317 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:13,317 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:13,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2021-08-06 19:37:13,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:13,518 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:13,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:13,518 INFO L82 PathProgramCache]: Analyzing trace with hash 249910455, now seen corresponding path program 134 times [2021-08-06 19:37:13,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:13,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017776926] [2021-08-06 19:37:13,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:13,518 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 83 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:13,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:13,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017776926] [2021-08-06 19:37:13,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017776926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:13,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130774981] [2021-08-06 19:37:13,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:37:13,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:13,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:13,646 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:13,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2021-08-06 19:37:18,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:37:18,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:18,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:37:18,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:18,716 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:37:18,717 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:37:18,738 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:37:18,739 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:37:18,764 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:18,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130774981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:18,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:18,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:37:18,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918415610] [2021-08-06 19:37:18,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:37:18,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:18,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:37:18,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:37:18,765 INFO L87 Difference]: Start difference. First operand 7704 states and 12712 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:18,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:18,907 INFO L93 Difference]: Finished difference Result 9415 states and 15053 transitions. [2021-08-06 19:37:18,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:37:18,907 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 19:37:18,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:18,919 INFO L225 Difference]: With dead ends: 9415 [2021-08-06 19:37:18,919 INFO L226 Difference]: Without dead ends: 9413 [2021-08-06 19:37:18,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:37:18,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9413 states. [2021-08-06 19:37:18,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9413 to 7635. [2021-08-06 19:37:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7635 states, 7634 states have (on average 1.6478910138852503) internal successors, (12580), 7634 states have internal predecessors, (12580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:19,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7635 states to 7635 states and 12580 transitions. [2021-08-06 19:37:19,010 INFO L78 Accepts]: Start accepts. Automaton has 7635 states and 12580 transitions. Word has length 53 [2021-08-06 19:37:19,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:19,010 INFO L470 AbstractCegarLoop]: Abstraction has 7635 states and 12580 transitions. [2021-08-06 19:37:19,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:19,010 INFO L276 IsEmpty]: Start isEmpty. Operand 7635 states and 12580 transitions. [2021-08-06 19:37:19,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:37:19,016 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:19,016 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:19,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2021-08-06 19:37:19,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-08-06 19:37:19,217 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:19,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:19,217 INFO L82 PathProgramCache]: Analyzing trace with hash -2047942083, now seen corresponding path program 63 times [2021-08-06 19:37:19,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:19,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283685686] [2021-08-06 19:37:19,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:19,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 31 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:19,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:19,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283685686] [2021-08-06 19:37:19,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283685686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:19,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786550581] [2021-08-06 19:37:19,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:37:19,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:19,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:19,344 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:19,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2021-08-06 19:37:24,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-06 19:37:24,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:24,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 19:37:24,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:24,393 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 95.5 percent of original size [2021-08-06 19:37:24,395 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 95.5 percent of original size [2021-08-06 19:37:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 59 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:24,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786550581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:24,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:24,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-08-06 19:37:24,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734054810] [2021-08-06 19:37:24,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:37:24,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:24,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:37:24,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:37:24,430 INFO L87 Difference]: Start difference. First operand 7635 states and 12580 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:24,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:24,875 INFO L93 Difference]: Finished difference Result 8761 states and 14155 transitions. [2021-08-06 19:37:24,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 19:37:24,875 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 19:37:24,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:24,886 INFO L225 Difference]: With dead ends: 8761 [2021-08-06 19:37:24,886 INFO L226 Difference]: Without dead ends: 8751 [2021-08-06 19:37:24,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 213.8ms TimeCoverageRelationStatistics Valid=282, Invalid=530, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:37:24,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8751 states. [2021-08-06 19:37:24,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8751 to 7627. [2021-08-06 19:37:24,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7627 states, 7626 states have (on average 1.6472593758195646) internal successors, (12562), 7626 states have internal predecessors, (12562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:24,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7627 states to 7627 states and 12562 transitions. [2021-08-06 19:37:24,973 INFO L78 Accepts]: Start accepts. Automaton has 7627 states and 12562 transitions. Word has length 53 [2021-08-06 19:37:24,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:24,973 INFO L470 AbstractCegarLoop]: Abstraction has 7627 states and 12562 transitions. [2021-08-06 19:37:24,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:24,974 INFO L276 IsEmpty]: Start isEmpty. Operand 7627 states and 12562 transitions. [2021-08-06 19:37:24,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:37:24,980 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:24,980 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:25,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2021-08-06 19:37:25,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-08-06 19:37:25,180 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:25,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:25,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1042046621, now seen corresponding path program 135 times [2021-08-06 19:37:25,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:25,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971026744] [2021-08-06 19:37:25,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:25,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:25,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:25,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971026744] [2021-08-06 19:37:25,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971026744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:25,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482087410] [2021-08-06 19:37:25,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:37:25,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:25,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:25,324 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:25,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2021-08-06 19:37:30,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 19:37:30,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:30,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:37:30,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:30,365 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:37:30,366 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 92.9 percent of original size [2021-08-06 19:37:30,420 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:37:30,420 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:37:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:30,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482087410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:30,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:30,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:37:30,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912802478] [2021-08-06 19:37:30,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:37:30,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:30,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:37:30,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:37:30,449 INFO L87 Difference]: Start difference. First operand 7627 states and 12562 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:30,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:30,619 INFO L93 Difference]: Finished difference Result 9446 states and 15076 transitions. [2021-08-06 19:37:30,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:37:30,619 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 19:37:30,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:30,632 INFO L225 Difference]: With dead ends: 9446 [2021-08-06 19:37:30,632 INFO L226 Difference]: Without dead ends: 9444 [2021-08-06 19:37:30,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:37:30,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9444 states. [2021-08-06 19:37:30,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9444 to 7627. [2021-08-06 19:37:30,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7627 states, 7626 states have (on average 1.6471282454760032) internal successors, (12561), 7626 states have internal predecessors, (12561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:30,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7627 states to 7627 states and 12561 transitions. [2021-08-06 19:37:30,722 INFO L78 Accepts]: Start accepts. Automaton has 7627 states and 12561 transitions. Word has length 53 [2021-08-06 19:37:30,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:30,722 INFO L470 AbstractCegarLoop]: Abstraction has 7627 states and 12561 transitions. [2021-08-06 19:37:30,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:30,722 INFO L276 IsEmpty]: Start isEmpty. Operand 7627 states and 12561 transitions. [2021-08-06 19:37:30,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:37:30,728 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:30,728 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:30,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2021-08-06 19:37:30,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-08-06 19:37:30,929 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:30,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:30,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1274723593, now seen corresponding path program 136 times [2021-08-06 19:37:30,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:30,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729720448] [2021-08-06 19:37:30,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:30,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:31,078 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 54 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:31,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:31,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729720448] [2021-08-06 19:37:31,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729720448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:31,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874497451] [2021-08-06 19:37:31,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:37:31,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:31,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:31,079 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:31,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2021-08-06 19:37:35,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:37:35,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:35,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:37:35,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:36,135 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:37:36,137 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:37:36,225 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:37:36,226 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:37:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 54 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:36,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874497451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:36,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:36,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 19:37:36,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598671748] [2021-08-06 19:37:36,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:37:36,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:36,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:37:36,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:37:36,254 INFO L87 Difference]: Start difference. First operand 7627 states and 12561 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:36,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:36,424 INFO L93 Difference]: Finished difference Result 9478 states and 15113 transitions. [2021-08-06 19:37:36,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:37:36,424 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 19:37:36,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:36,436 INFO L225 Difference]: With dead ends: 9478 [2021-08-06 19:37:36,436 INFO L226 Difference]: Without dead ends: 9462 [2021-08-06 19:37:36,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:37:36,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9462 states. [2021-08-06 19:37:36,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9462 to 7751. [2021-08-06 19:37:36,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7751 states, 7750 states have (on average 1.6503225806451614) internal successors, (12790), 7750 states have internal predecessors, (12790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:36,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7751 states to 7751 states and 12790 transitions. [2021-08-06 19:37:36,534 INFO L78 Accepts]: Start accepts. Automaton has 7751 states and 12790 transitions. Word has length 53 [2021-08-06 19:37:36,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:36,535 INFO L470 AbstractCegarLoop]: Abstraction has 7751 states and 12790 transitions. [2021-08-06 19:37:36,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:36,535 INFO L276 IsEmpty]: Start isEmpty. Operand 7751 states and 12790 transitions. [2021-08-06 19:37:36,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:37:36,542 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:36,542 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:36,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2021-08-06 19:37:36,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:36,743 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:36,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:36,743 INFO L82 PathProgramCache]: Analyzing trace with hash -51722147, now seen corresponding path program 137 times [2021-08-06 19:37:36,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:36,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233915556] [2021-08-06 19:37:36,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:36,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:36,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:36,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233915556] [2021-08-06 19:37:36,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233915556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:36,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185365641] [2021-08-06 19:37:36,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:37:36,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:36,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:36,886 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:36,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2021-08-06 19:37:41,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 19:37:41,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:41,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:37:41,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:41,976 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:37:41,978 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:37:42,087 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:37:42,087 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:37:42,112 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:42,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185365641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:42,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:42,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-08-06 19:37:42,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121900301] [2021-08-06 19:37:42,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:37:42,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:42,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:37:42,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:37:42,113 INFO L87 Difference]: Start difference. First operand 7751 states and 12790 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:42,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:42,344 INFO L93 Difference]: Finished difference Result 9664 states and 15375 transitions. [2021-08-06 19:37:42,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:37:42,344 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 19:37:42,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:42,355 INFO L225 Difference]: With dead ends: 9664 [2021-08-06 19:37:42,355 INFO L226 Difference]: Without dead ends: 9636 [2021-08-06 19:37:42,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:37:42,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9636 states. [2021-08-06 19:37:42,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9636 to 7751. [2021-08-06 19:37:42,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7751 states, 7750 states have (on average 1.6499354838709677) internal successors, (12787), 7750 states have internal predecessors, (12787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:42,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7751 states to 7751 states and 12787 transitions. [2021-08-06 19:37:42,444 INFO L78 Accepts]: Start accepts. Automaton has 7751 states and 12787 transitions. Word has length 53 [2021-08-06 19:37:42,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:42,444 INFO L470 AbstractCegarLoop]: Abstraction has 7751 states and 12787 transitions. [2021-08-06 19:37:42,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:42,444 INFO L276 IsEmpty]: Start isEmpty. Operand 7751 states and 12787 transitions. [2021-08-06 19:37:42,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:37:42,450 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:42,450 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:42,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2021-08-06 19:37:42,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-08-06 19:37:42,650 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:42,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:42,651 INFO L82 PathProgramCache]: Analyzing trace with hash 176783671, now seen corresponding path program 138 times [2021-08-06 19:37:42,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:42,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949115906] [2021-08-06 19:37:42,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:42,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:42,802 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:42,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:42,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949115906] [2021-08-06 19:37:42,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949115906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:42,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884069342] [2021-08-06 19:37:42,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:37:42,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:42,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:42,803 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:42,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2021-08-06 19:37:47,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:37:47,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:47,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:37:47,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:47,946 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:37:47,947 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:37:48,090 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:37:48,090 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:37:48,116 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:48,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884069342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:48,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:48,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:37:48,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139764992] [2021-08-06 19:37:48,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:37:48,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:48,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:37:48,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:37:48,117 INFO L87 Difference]: Start difference. First operand 7751 states and 12787 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:48,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:48,314 INFO L93 Difference]: Finished difference Result 9602 states and 15269 transitions. [2021-08-06 19:37:48,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:37:48,315 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 19:37:48,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:48,325 INFO L225 Difference]: With dead ends: 9602 [2021-08-06 19:37:48,325 INFO L226 Difference]: Without dead ends: 9562 [2021-08-06 19:37:48,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:37:48,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9562 states. [2021-08-06 19:37:48,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9562 to 7759. [2021-08-06 19:37:48,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7759 states, 7758 states have (on average 1.6491363753544728) internal successors, (12794), 7758 states have internal predecessors, (12794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:48,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7759 states to 7759 states and 12794 transitions. [2021-08-06 19:37:48,414 INFO L78 Accepts]: Start accepts. Automaton has 7759 states and 12794 transitions. Word has length 53 [2021-08-06 19:37:48,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:48,414 INFO L470 AbstractCegarLoop]: Abstraction has 7759 states and 12794 transitions. [2021-08-06 19:37:48,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:48,414 INFO L276 IsEmpty]: Start isEmpty. Operand 7759 states and 12794 transitions. [2021-08-06 19:37:48,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:37:48,421 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:48,421 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:48,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2021-08-06 19:37:48,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:48,621 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:48,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:48,622 INFO L82 PathProgramCache]: Analyzing trace with hash 70443549, now seen corresponding path program 139 times [2021-08-06 19:37:48,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:48,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205178384] [2021-08-06 19:37:48,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:48,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:48,787 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 54 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:48,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:48,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205178384] [2021-08-06 19:37:48,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205178384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:48,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375987367] [2021-08-06 19:37:48,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:37:48,788 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:48,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:48,789 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:48,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2021-08-06 19:37:53,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:53,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:37:53,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:53,844 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:37:53,845 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:37:54,017 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:37:54,018 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:37:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 54 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:54,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375987367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:54,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:54,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 19:37:54,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649960448] [2021-08-06 19:37:54,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:37:54,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:54,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:37:54,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:37:54,045 INFO L87 Difference]: Start difference. First operand 7759 states and 12794 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:54,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:54,281 INFO L93 Difference]: Finished difference Result 9716 states and 15417 transitions. [2021-08-06 19:37:54,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:37:54,281 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 19:37:54,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:54,292 INFO L225 Difference]: With dead ends: 9716 [2021-08-06 19:37:54,293 INFO L226 Difference]: Without dead ends: 9664 [2021-08-06 19:37:54,293 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 142.2ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:37:54,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9664 states. [2021-08-06 19:37:54,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9664 to 7783. [2021-08-06 19:37:54,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7783 states, 7782 states have (on average 1.6476484194294525) internal successors, (12822), 7782 states have internal predecessors, (12822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:54,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7783 states to 7783 states and 12822 transitions. [2021-08-06 19:37:54,391 INFO L78 Accepts]: Start accepts. Automaton has 7783 states and 12822 transitions. Word has length 53 [2021-08-06 19:37:54,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:54,391 INFO L470 AbstractCegarLoop]: Abstraction has 7783 states and 12822 transitions. [2021-08-06 19:37:54,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:54,391 INFO L276 IsEmpty]: Start isEmpty. Operand 7783 states and 12822 transitions. [2021-08-06 19:37:54,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:37:54,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:54,398 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:54,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2021-08-06 19:37:54,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-08-06 19:37:54,599 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:54,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:54,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1777733495, now seen corresponding path program 140 times [2021-08-06 19:37:54,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:54,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798830297] [2021-08-06 19:37:54,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:54,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:54,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:54,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798830297] [2021-08-06 19:37:54,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798830297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:54,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476256719] [2021-08-06 19:37:54,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:37:54,783 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:54,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:54,784 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:54,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2021-08-06 19:37:59,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:37:59,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:59,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:37:59,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:59,899 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:37:59,900 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:38:00,122 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:38:00,122 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:38:00,152 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:00,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476256719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:00,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:00,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 19:38:00,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027768370] [2021-08-06 19:38:00,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:38:00,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:00,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:38:00,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:38:00,153 INFO L87 Difference]: Start difference. First operand 7783 states and 12822 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:00,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:00,441 INFO L93 Difference]: Finished difference Result 9794 states and 15500 transitions. [2021-08-06 19:38:00,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:38:00,442 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 19:38:00,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:00,457 INFO L225 Difference]: With dead ends: 9794 [2021-08-06 19:38:00,457 INFO L226 Difference]: Without dead ends: 9730 [2021-08-06 19:38:00,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:38:00,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9730 states. [2021-08-06 19:38:00,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9730 to 7723. [2021-08-06 19:38:00,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7723 states, 7722 states have (on average 1.641932141932142) internal successors, (12679), 7722 states have internal predecessors, (12679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:00,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7723 states to 7723 states and 12679 transitions. [2021-08-06 19:38:00,574 INFO L78 Accepts]: Start accepts. Automaton has 7723 states and 12679 transitions. Word has length 53 [2021-08-06 19:38:00,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:00,574 INFO L470 AbstractCegarLoop]: Abstraction has 7723 states and 12679 transitions. [2021-08-06 19:38:00,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:00,574 INFO L276 IsEmpty]: Start isEmpty. Operand 7723 states and 12679 transitions. [2021-08-06 19:38:00,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:38:00,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:00,583 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:00,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2021-08-06 19:38:00,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-08-06 19:38:00,784 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:00,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:00,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1645171747, now seen corresponding path program 141 times [2021-08-06 19:38:00,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:00,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633104021] [2021-08-06 19:38:00,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:00,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 85 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:01,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:01,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633104021] [2021-08-06 19:38:01,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633104021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:01,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223226511] [2021-08-06 19:38:01,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:38:01,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:01,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:01,051 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:01,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2021-08-06 19:38:05,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-06 19:38:05,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:05,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:38:05,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:06,156 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:38:06,158 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:38:06,397 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:38:06,398 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:38:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 85 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:06,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223226511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:06,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:06,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-06 19:38:06,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228315679] [2021-08-06 19:38:06,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:38:06,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:06,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:38:06,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:38:06,433 INFO L87 Difference]: Start difference. First operand 7723 states and 12679 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:06,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:06,700 INFO L93 Difference]: Finished difference Result 9423 states and 14962 transitions. [2021-08-06 19:38:06,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:38:06,701 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 19:38:06,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:06,711 INFO L225 Difference]: With dead ends: 9423 [2021-08-06 19:38:06,711 INFO L226 Difference]: Without dead ends: 9347 [2021-08-06 19:38:06,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 248.7ms TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:38:06,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9347 states. [2021-08-06 19:38:06,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9347 to 7809. [2021-08-06 19:38:06,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7809 states, 7808 states have (on average 1.6378073770491803) internal successors, (12788), 7808 states have internal predecessors, (12788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:06,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7809 states to 7809 states and 12788 transitions. [2021-08-06 19:38:06,798 INFO L78 Accepts]: Start accepts. Automaton has 7809 states and 12788 transitions. Word has length 53 [2021-08-06 19:38:06,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:06,798 INFO L470 AbstractCegarLoop]: Abstraction has 7809 states and 12788 transitions. [2021-08-06 19:38:06,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:06,798 INFO L276 IsEmpty]: Start isEmpty. Operand 7809 states and 12788 transitions. [2021-08-06 19:38:06,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:38:06,804 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:06,804 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:06,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2021-08-06 19:38:07,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:07,005 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:07,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:07,005 INFO L82 PathProgramCache]: Analyzing trace with hash 365807105, now seen corresponding path program 142 times [2021-08-06 19:38:07,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:07,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827242509] [2021-08-06 19:38:07,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:07,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:07,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:07,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:07,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827242509] [2021-08-06 19:38:07,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827242509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:07,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640916076] [2021-08-06 19:38:07,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:38:07,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:07,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:07,198 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:07,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2021-08-06 19:38:12,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:38:12,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:12,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 19:38:12,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:12,616 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 95.5 percent of original size [2021-08-06 19:38:12,618 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 95.5 percent of original size [2021-08-06 19:38:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:12,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640916076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:12,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:12,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2021-08-06 19:38:12,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747810656] [2021-08-06 19:38:12,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:38:12,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:12,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:38:12,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:38:12,657 INFO L87 Difference]: Start difference. First operand 7809 states and 12788 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:12,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:12,907 INFO L93 Difference]: Finished difference Result 9531 states and 15266 transitions. [2021-08-06 19:38:12,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:38:12,907 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 19:38:12,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:12,919 INFO L225 Difference]: With dead ends: 9531 [2021-08-06 19:38:12,919 INFO L226 Difference]: Without dead ends: 9531 [2021-08-06 19:38:12,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=121, Invalid=185, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:38:12,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9531 states. [2021-08-06 19:38:13,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9531 to 7852. [2021-08-06 19:38:13,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7852 states, 7851 states have (on average 1.638644758629474) internal successors, (12865), 7851 states have internal predecessors, (12865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:13,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7852 states to 7852 states and 12865 transitions. [2021-08-06 19:38:13,050 INFO L78 Accepts]: Start accepts. Automaton has 7852 states and 12865 transitions. Word has length 53 [2021-08-06 19:38:13,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:13,050 INFO L470 AbstractCegarLoop]: Abstraction has 7852 states and 12865 transitions. [2021-08-06 19:38:13,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:13,050 INFO L276 IsEmpty]: Start isEmpty. Operand 7852 states and 12865 transitions. [2021-08-06 19:38:13,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:38:13,056 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:13,056 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:13,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2021-08-06 19:38:13,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:13,256 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:13,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:13,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1079655480, now seen corresponding path program 64 times [2021-08-06 19:38:13,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:13,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699500953] [2021-08-06 19:38:13,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:13,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:13,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:13,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699500953] [2021-08-06 19:38:13,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699500953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:13,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560023756] [2021-08-06 19:38:13,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:38:13,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:13,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:13,466 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:13,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2021-08-06 19:38:18,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:38:18,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:18,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 19:38:18,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:18,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 19:38:18,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-08-06 19:38:18,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 19:38:18,886 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 10 treesize of output 1 [2021-08-06 19:38:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:18,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560023756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:18,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:18,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-06 19:38:18,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877839840] [2021-08-06 19:38:18,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:38:18,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:18,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:38:18,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:38:18,935 INFO L87 Difference]: Start difference. First operand 7852 states and 12865 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:19,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:19,426 INFO L93 Difference]: Finished difference Result 9639 states and 15503 transitions. [2021-08-06 19:38:19,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:38:19,426 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 19:38:19,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:19,438 INFO L225 Difference]: With dead ends: 9639 [2021-08-06 19:38:19,438 INFO L226 Difference]: Without dead ends: 9598 [2021-08-06 19:38:19,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 231.5ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:38:19,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9598 states. [2021-08-06 19:38:19,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9598 to 8040. [2021-08-06 19:38:19,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8040 states, 8039 states have (on average 1.6400049757432515) internal successors, (13184), 8039 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:19,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8040 states to 8040 states and 13184 transitions. [2021-08-06 19:38:19,538 INFO L78 Accepts]: Start accepts. Automaton has 8040 states and 13184 transitions. Word has length 53 [2021-08-06 19:38:19,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:19,538 INFO L470 AbstractCegarLoop]: Abstraction has 8040 states and 13184 transitions. [2021-08-06 19:38:19,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:19,538 INFO L276 IsEmpty]: Start isEmpty. Operand 8040 states and 13184 transitions. [2021-08-06 19:38:19,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:38:19,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:19,546 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:19,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2021-08-06 19:38:19,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-08-06 19:38:19,746 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:19,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:19,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1612382153, now seen corresponding path program 143 times [2021-08-06 19:38:19,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:19,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146736288] [2021-08-06 19:38:19,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:19,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 94 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:19,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:19,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146736288] [2021-08-06 19:38:19,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146736288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:19,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111222795] [2021-08-06 19:38:19,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:38:19,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:19,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:19,875 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:19,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2021-08-06 19:38:24,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-06 19:38:24,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:24,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:38:24,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:25,256 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:38:25,257 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:38:25,278 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:38:25,279 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:38:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 98 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:25,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111222795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:25,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:25,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 14 [2021-08-06 19:38:25,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846477827] [2021-08-06 19:38:25,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:38:25,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:25,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:38:25,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:38:25,305 INFO L87 Difference]: Start difference. First operand 8040 states and 13184 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:25,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:25,486 INFO L93 Difference]: Finished difference Result 9754 states and 15556 transitions. [2021-08-06 19:38:25,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:38:25,487 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 19:38:25,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:25,496 INFO L225 Difference]: With dead ends: 9754 [2021-08-06 19:38:25,496 INFO L226 Difference]: Without dead ends: 9750 [2021-08-06 19:38:25,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:38:25,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9750 states. [2021-08-06 19:38:25,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9750 to 8011. [2021-08-06 19:38:25,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8011 states, 8010 states have (on average 1.6387016229712859) internal successors, (13126), 8010 states have internal predecessors, (13126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:25,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8011 states to 8011 states and 13126 transitions. [2021-08-06 19:38:25,579 INFO L78 Accepts]: Start accepts. Automaton has 8011 states and 13126 transitions. Word has length 53 [2021-08-06 19:38:25,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:25,579 INFO L470 AbstractCegarLoop]: Abstraction has 8011 states and 13126 transitions. [2021-08-06 19:38:25,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:25,579 INFO L276 IsEmpty]: Start isEmpty. Operand 8011 states and 13126 transitions. [2021-08-06 19:38:25,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:38:25,585 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:25,585 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:25,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2021-08-06 19:38:25,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-08-06 19:38:25,785 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:25,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:25,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1921330120, now seen corresponding path program 144 times [2021-08-06 19:38:25,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:25,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449200315] [2021-08-06 19:38:25,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:25,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:25,908 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:38:25,911 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:38:25,933 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:38:25,934 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:38:25,939 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 22 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:25,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:25,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449200315] [2021-08-06 19:38:25,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449200315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:25,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745434333] [2021-08-06 19:38:25,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:38:25,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:25,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:25,941 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:25,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2021-08-06 19:38:31,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-06 19:38:31,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:31,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 19:38:31,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:31,728 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:31,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745434333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:31,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:31,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-08-06 19:38:31,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654013725] [2021-08-06 19:38:31,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:38:31,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:31,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:38:31,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:38:31,729 INFO L87 Difference]: Start difference. First operand 8011 states and 13126 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:32,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:32,332 INFO L93 Difference]: Finished difference Result 8629 states and 13967 transitions. [2021-08-06 19:38:32,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:38:32,332 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 19:38:32,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:32,341 INFO L225 Difference]: With dead ends: 8629 [2021-08-06 19:38:32,341 INFO L226 Difference]: Without dead ends: 8530 [2021-08-06 19:38:32,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:38:32,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8530 states. [2021-08-06 19:38:32,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8530 to 8110. [2021-08-06 19:38:32,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8110 states, 8109 states have (on average 1.6394129979035639) internal successors, (13294), 8109 states have internal predecessors, (13294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:32,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8110 states to 8110 states and 13294 transitions. [2021-08-06 19:38:32,416 INFO L78 Accepts]: Start accepts. Automaton has 8110 states and 13294 transitions. Word has length 53 [2021-08-06 19:38:32,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:32,416 INFO L470 AbstractCegarLoop]: Abstraction has 8110 states and 13294 transitions. [2021-08-06 19:38:32,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:32,416 INFO L276 IsEmpty]: Start isEmpty. Operand 8110 states and 13294 transitions. [2021-08-06 19:38:32,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:38:32,422 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:32,422 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:32,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2021-08-06 19:38:32,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-08-06 19:38:32,623 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:32,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:32,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1188709112, now seen corresponding path program 145 times [2021-08-06 19:38:32,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:32,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137859789] [2021-08-06 19:38:32,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:32,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:32,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:32,728 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:38:32,729 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:38:32,735 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:38:32,738 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:38:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:38:32,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:32,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137859789] [2021-08-06 19:38:32,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137859789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:32,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065184965] [2021-08-06 19:38:32,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:38:32,773 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:32,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:32,773 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:32,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2021-08-06 19:38:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:37,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 19:38:37,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:38:38,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065184965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:38,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:38,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:38:38,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941541585] [2021-08-06 19:38:38,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:38:38,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:38,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:38:38,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:38:38,193 INFO L87 Difference]: Start difference. First operand 8110 states and 13294 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:38,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:38,543 INFO L93 Difference]: Finished difference Result 8839 states and 14358 transitions. [2021-08-06 19:38:38,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:38:38,544 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 19:38:38,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:38,553 INFO L225 Difference]: With dead ends: 8839 [2021-08-06 19:38:38,553 INFO L226 Difference]: Without dead ends: 8829 [2021-08-06 19:38:38,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:38:38,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8829 states. [2021-08-06 19:38:38,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8829 to 8201. [2021-08-06 19:38:38,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8201 states, 8200 states have (on average 1.6392682926829267) internal successors, (13442), 8200 states have internal predecessors, (13442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:38,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8201 states to 8201 states and 13442 transitions. [2021-08-06 19:38:38,683 INFO L78 Accepts]: Start accepts. Automaton has 8201 states and 13442 transitions. Word has length 53 [2021-08-06 19:38:38,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:38,683 INFO L470 AbstractCegarLoop]: Abstraction has 8201 states and 13442 transitions. [2021-08-06 19:38:38,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:38,683 INFO L276 IsEmpty]: Start isEmpty. Operand 8201 states and 13442 transitions. [2021-08-06 19:38:38,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:38:38,690 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:38,690 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:38,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2021-08-06 19:38:38,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-08-06 19:38:38,890 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:38,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:38,890 INFO L82 PathProgramCache]: Analyzing trace with hash -352077599, now seen corresponding path program 65 times [2021-08-06 19:38:38,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:38,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245635492] [2021-08-06 19:38:38,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:38,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:39,019 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 23 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:39,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:39,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245635492] [2021-08-06 19:38:39,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245635492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:39,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24067739] [2021-08-06 19:38:39,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:38:39,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:39,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:39,021 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:39,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2021-08-06 19:38:44,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-06 19:38:44,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:44,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:38:44,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:44,518 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:38:44,518 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:38:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 40 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:44,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24067739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:44,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:44,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2021-08-06 19:38:44,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152359855] [2021-08-06 19:38:44,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:38:44,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:44,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:38:44,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:38:44,536 INFO L87 Difference]: Start difference. First operand 8201 states and 13442 transitions. Second operand has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:44,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:44,849 INFO L93 Difference]: Finished difference Result 12024 states and 19156 transitions. [2021-08-06 19:38:44,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:38:44,849 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 19:38:44,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:44,864 INFO L225 Difference]: With dead ends: 12024 [2021-08-06 19:38:44,865 INFO L226 Difference]: Without dead ends: 12019 [2021-08-06 19:38:44,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 129.3ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:38:44,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12019 states. [2021-08-06 19:38:44,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12019 to 8321. [2021-08-06 19:38:44,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8321 states, 8320 states have (on average 1.6431490384615384) internal successors, (13671), 8320 states have internal predecessors, (13671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:44,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8321 states to 8321 states and 13671 transitions. [2021-08-06 19:38:44,992 INFO L78 Accepts]: Start accepts. Automaton has 8321 states and 13671 transitions. Word has length 53 [2021-08-06 19:38:44,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:44,992 INFO L470 AbstractCegarLoop]: Abstraction has 8321 states and 13671 transitions. [2021-08-06 19:38:44,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:44,992 INFO L276 IsEmpty]: Start isEmpty. Operand 8321 states and 13671 transitions. [2021-08-06 19:38:44,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:38:44,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:44,999 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:45,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2021-08-06 19:38:45,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-08-06 19:38:45,200 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:45,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:45,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1147807139, now seen corresponding path program 146 times [2021-08-06 19:38:45,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:45,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907446052] [2021-08-06 19:38:45,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:45,200 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:45,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:45,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907446052] [2021-08-06 19:38:45,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907446052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:45,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204369150] [2021-08-06 19:38:45,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:38:45,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:45,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:45,369 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:45,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2021-08-06 19:38:50,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:38:50,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:50,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:38:50,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:51,055 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:38:51,056 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 4.8 percent of original size [2021-08-06 19:38:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:51,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204369150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:51,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:51,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:38:51,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195508926] [2021-08-06 19:38:51,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:38:51,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:51,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:38:51,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:38:51,079 INFO L87 Difference]: Start difference. First operand 8321 states and 13671 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:51,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:51,341 INFO L93 Difference]: Finished difference Result 9921 states and 15984 transitions. [2021-08-06 19:38:51,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:38:51,342 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 19:38:51,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:51,353 INFO L225 Difference]: With dead ends: 9921 [2021-08-06 19:38:51,353 INFO L226 Difference]: Without dead ends: 9921 [2021-08-06 19:38:51,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:38:51,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9921 states. [2021-08-06 19:38:51,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9921 to 8492. [2021-08-06 19:38:51,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8492 states, 8491 states have (on average 1.6480979861029326) internal successors, (13994), 8491 states have internal predecessors, (13994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:51,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8492 states to 8492 states and 13994 transitions. [2021-08-06 19:38:51,453 INFO L78 Accepts]: Start accepts. Automaton has 8492 states and 13994 transitions. Word has length 53 [2021-08-06 19:38:51,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:51,453 INFO L470 AbstractCegarLoop]: Abstraction has 8492 states and 13994 transitions. [2021-08-06 19:38:51,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:51,453 INFO L276 IsEmpty]: Start isEmpty. Operand 8492 states and 13994 transitions. [2021-08-06 19:38:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:38:51,460 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:51,460 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:51,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2021-08-06 19:38:51,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:51,661 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:51,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:51,661 INFO L82 PathProgramCache]: Analyzing trace with hash 873752438, now seen corresponding path program 66 times [2021-08-06 19:38:51,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:51,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47372038] [2021-08-06 19:38:51,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:51,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:51,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:51,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47372038] [2021-08-06 19:38:51,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47372038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:51,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424692331] [2021-08-06 19:38:51,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:38:51,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:51,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:51,812 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:51,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2021-08-06 19:38:57,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-06 19:38:57,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:57,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 19:38:57,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:57,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424692331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:57,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:57,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:38:57,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723926877] [2021-08-06 19:38:57,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:38:57,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:57,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:38:57,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:38:57,349 INFO L87 Difference]: Start difference. First operand 8492 states and 13994 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:57,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:57,883 INFO L93 Difference]: Finished difference Result 10012 states and 16219 transitions. [2021-08-06 19:38:57,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:38:57,883 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 19:38:57,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:57,893 INFO L225 Difference]: With dead ends: 10012 [2021-08-06 19:38:57,894 INFO L226 Difference]: Without dead ends: 10012 [2021-08-06 19:38:57,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 184.9ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:38:57,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10012 states. [2021-08-06 19:38:57,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10012 to 8523. [2021-08-06 19:38:58,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8523 states, 8522 states have (on average 1.6485566768364235) internal successors, (14049), 8522 states have internal predecessors, (14049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:58,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8523 states to 8523 states and 14049 transitions. [2021-08-06 19:38:58,059 INFO L78 Accepts]: Start accepts. Automaton has 8523 states and 14049 transitions. Word has length 53 [2021-08-06 19:38:58,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:58,059 INFO L470 AbstractCegarLoop]: Abstraction has 8523 states and 14049 transitions. [2021-08-06 19:38:58,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:58,059 INFO L276 IsEmpty]: Start isEmpty. Operand 8523 states and 14049 transitions. [2021-08-06 19:38:58,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:38:58,066 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:58,066 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:58,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Forceful destruction successful, exit code 0 [2021-08-06 19:38:58,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-08-06 19:38:58,266 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:58,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:58,266 INFO L82 PathProgramCache]: Analyzing trace with hash -729177225, now seen corresponding path program 147 times [2021-08-06 19:38:58,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:58,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512440638] [2021-08-06 19:38:58,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:58,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:58,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 99 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:58,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:58,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512440638] [2021-08-06 19:38:58,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512440638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:58,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352124182] [2021-08-06 19:38:58,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:38:58,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:58,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:58,395 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:58,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2021-08-06 19:39:03,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-06 19:39:03,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:03,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:39:03,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:03,970 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:39:03,972 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:39:03,994 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:39:03,994 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:39:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 106 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:04,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352124182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:04,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:04,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:39:04,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758911607] [2021-08-06 19:39:04,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:39:04,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:04,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:39:04,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:39:04,021 INFO L87 Difference]: Start difference. First operand 8523 states and 14049 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:04,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:04,184 INFO L93 Difference]: Finished difference Result 9838 states and 15842 transitions. [2021-08-06 19:39:04,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:39:04,184 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 19:39:04,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:04,196 INFO L225 Difference]: With dead ends: 9838 [2021-08-06 19:39:04,197 INFO L226 Difference]: Without dead ends: 9834 [2021-08-06 19:39:04,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:39:04,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9834 states. [2021-08-06 19:39:04,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9834 to 8481. [2021-08-06 19:39:04,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8481 states, 8480 states have (on average 1.6470518867924528) internal successors, (13967), 8480 states have internal predecessors, (13967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:04,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8481 states to 8481 states and 13967 transitions. [2021-08-06 19:39:04,303 INFO L78 Accepts]: Start accepts. Automaton has 8481 states and 13967 transitions. Word has length 53 [2021-08-06 19:39:04,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:04,303 INFO L470 AbstractCegarLoop]: Abstraction has 8481 states and 13967 transitions. [2021-08-06 19:39:04,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:04,303 INFO L276 IsEmpty]: Start isEmpty. Operand 8481 states and 13967 transitions. [2021-08-06 19:39:04,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:39:04,311 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:04,311 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:04,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2021-08-06 19:39:04,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-08-06 19:39:04,511 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:04,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:04,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1036176182, now seen corresponding path program 148 times [2021-08-06 19:39:04,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:04,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612431831] [2021-08-06 19:39:04,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:04,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:04,644 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:39:04,647 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:39:04,668 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:39:04,669 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:39:04,675 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 22 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:04,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:04,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612431831] [2021-08-06 19:39:04,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612431831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:04,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000577805] [2021-08-06 19:39:04,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:39:04,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:04,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:04,676 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:04,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2021-08-06 19:39:10,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:39:10,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:10,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 19:39:10,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:10,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000577805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:10,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:10,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-06 19:39:10,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884739060] [2021-08-06 19:39:10,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:39:10,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:10,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:39:10,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:39:10,485 INFO L87 Difference]: Start difference. First operand 8481 states and 13967 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:11,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:11,271 INFO L93 Difference]: Finished difference Result 8921 states and 14524 transitions. [2021-08-06 19:39:11,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:39:11,271 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 19:39:11,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:11,282 INFO L225 Difference]: With dead ends: 8921 [2021-08-06 19:39:11,282 INFO L226 Difference]: Without dead ends: 8828 [2021-08-06 19:39:11,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 164.3ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:39:11,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8828 states. [2021-08-06 19:39:11,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8828 to 8354. [2021-08-06 19:39:11,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8354 states, 8353 states have (on average 1.6474320603376034) internal successors, (13761), 8353 states have internal predecessors, (13761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:11,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8354 states to 8354 states and 13761 transitions. [2021-08-06 19:39:11,378 INFO L78 Accepts]: Start accepts. Automaton has 8354 states and 13761 transitions. Word has length 53 [2021-08-06 19:39:11,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:11,378 INFO L470 AbstractCegarLoop]: Abstraction has 8354 states and 13761 transitions. [2021-08-06 19:39:11,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:11,378 INFO L276 IsEmpty]: Start isEmpty. Operand 8354 states and 13761 transitions. [2021-08-06 19:39:11,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 19:39:11,385 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:11,386 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:11,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2021-08-06 19:39:11,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:11,586 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:11,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:11,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1390169116, now seen corresponding path program 149 times [2021-08-06 19:39:11,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:11,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355698954] [2021-08-06 19:39:11,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:11,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:11,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:11,692 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:39:11,694 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 19:39:11,700 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:39:11,702 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 77.8 percent of original size [2021-08-06 19:39:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:39:11,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:11,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355698954] [2021-08-06 19:39:11,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355698954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:11,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214471939] [2021-08-06 19:39:11,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:39:11,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:11,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:11,736 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:11,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process Received shutdown request... [2021-08-06 19:39:16,518 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 19:39:16,518 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 19:39:17,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-06 19:39:17,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:17,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 19:39:17,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:17,128 WARN L223 SmtUtils]: Removed 1 from assertion stack [2021-08-06 19:39:17,130 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 19:39:17,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2021-08-06 19:39:17,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:17,331 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 54 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. [2021-08-06 19:39:17,332 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 19:39:17,332 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 19:39:17,335 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 19:39:17,335 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 19:39:17,336 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 07:39:17 BasicIcfg [2021-08-06 19:39:17,336 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 19:39:17,337 INFO L168 Benchmark]: Toolchain (without parser) took 739073.04 ms. Allocated memory was 219.2 MB in the beginning and 2.7 GB in the end (delta: 2.4 GB). Free memory was 199.3 MB in the beginning and 615.1 MB in the end (delta: -415.8 MB). Peak memory consumption was 2.0 GB. Max. memory is 8.0 GB. [2021-08-06 19:39:17,337 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.37 ms. Allocated memory is still 219.2 MB. Free memory is still 200.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 19:39:17,337 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.10 ms. Allocated memory is still 219.2 MB. Free memory was 199.1 MB in the beginning and 197.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 19:39:17,337 INFO L168 Benchmark]: Boogie Preprocessor took 13.47 ms. Allocated memory is still 219.2 MB. Free memory was 197.7 MB in the beginning and 196.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 19:39:17,337 INFO L168 Benchmark]: RCFGBuilder took 216.56 ms. Allocated memory is still 219.2 MB. Free memory was 196.6 MB in the beginning and 184.7 MB in the end (delta: 12.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-08-06 19:39:17,337 INFO L168 Benchmark]: TraceAbstraction took 738817.92 ms. Allocated memory was 219.2 MB in the beginning and 2.7 GB in the end (delta: 2.4 GB). Free memory was 184.2 MB in the beginning and 615.1 MB in the end (delta: -430.8 MB). Peak memory consumption was 2.0 GB. Max. memory is 8.0 GB. [2021-08-06 19:39:17,337 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 0.37 ms. Allocated memory is still 219.2 MB. Free memory is still 200.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.10 ms. Allocated memory is still 219.2 MB. Free memory was 199.1 MB in the beginning and 197.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.47 ms. Allocated memory is still 219.2 MB. Free memory was 197.7 MB in the beginning and 196.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 216.56 ms. Allocated memory is still 219.2 MB. Free memory was 196.6 MB in the beginning and 184.7 MB in the end (delta: 12.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 738817.92 ms. Allocated memory was 219.2 MB in the beginning and 2.7 GB in the end (delta: 2.4 GB). Free memory was 184.2 MB in the beginning and 615.1 MB in the end (delta: -430.8 MB). Peak memory consumption was 2.0 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 79, positive: 63, positive conditional: 63, positive unconditional: 0, negative: 16, negative conditional: 16, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 63, positive: 63, positive conditional: 0, positive unconditional: 63, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 63, positive: 63, positive conditional: 0, positive unconditional: 63, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 63, positive: 63, positive conditional: 0, positive unconditional: 63, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 63, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 63, unknown conditional: 0, unknown unconditional: 63] , Statistics on independence cache: Total cache size (in pairs): 63, Positive cache size: 63, Positive conditional cache size: 0, Positive unconditional cache size: 63, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 16 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 54 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 54 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 54 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 738719.2ms, OverallIterations: 231, TraceHistogramMax: 8, EmptinessCheckTime: 654.0ms, AutomataDifference: 70786.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 66.2ms, PartialOrderReductionTime: 53.7ms, HoareTripleCheckerStatistics: 8782 SDtfs, 35522 SDslu, 54205 SDs, 0 SdLazy, 105457 SolverSat, 4041 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 37294.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12918 GetRequests, 8489 SyntacticMatches, 436 SemanticMatches, 3993 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26059 ImplicationChecksByTransitivity, 35269.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8523occurred in iteration=228, InterpolantAutomatonStates: 3718, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 8829.3ms AutomataMinimizationTime, 230 MinimizatonAttempts, 180266 StatesRemovedByMinimization, 230 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 618.6ms SsaConstructionTime, 3675.3ms SatisfiabilityAnalysisTime, 88469.3ms InterpolantComputationTime, 18008 NumberOfCodeBlocks, 18008 NumberOfCodeBlocksAsserted, 1218 NumberOfCheckSat, 17554 ConstructedInterpolants, 123 QuantifiedInterpolants, 128310 SizeOfPredicates, 355 NumberOfNonLiveVariables, 20551 ConjunctsInSsa, 3779 ConjunctsInUnsatCore, 454 InterpolantComputations, 6 PerfectInterpolantSequences, 10443/31144 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