/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 16:13:22,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 16:13:22,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 16:13:22,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 16:13:22,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 16:13:22,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 16:13:22,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 16:13:22,291 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-15 16:13:22,305 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 16:13:22,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 16:13:22,306 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 16:13:22,306 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 16:13:22,306 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 16:13:22,307 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 16:13:22,307 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 16:13:22,307 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 16:13:22,307 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 16:13:22,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 16:13:22,307 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 16:13:22,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 16:13:22,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 16:13:22,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 16:13:22,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 16:13:22,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 16:13:22,308 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 16:13:22,308 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 16:13:22,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 16:13:22,308 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 16:13:22,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 16:13:22,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 16:13:22,308 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 16:13:22,308 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 16:13:22,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 16:13:22,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:13:22,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 16:13:22,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 16:13:22,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 16:13:22,309 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 16:13:22,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 16:13:22,309 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 16:13:22,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 16:13:22,309 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 16:13:22,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 16:13:22,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 16:13:22,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 16:13:22,489 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 16:13:22,490 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 16:13:22,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl [2022-03-15 16:13:22,491 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl' [2022-03-15 16:13:22,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 16:13:22,514 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 16:13:22,515 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 16:13:22,515 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 16:13:22,515 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 16:13:22,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:13:22" (1/1) ... [2022-03-15 16:13:22,533 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:13:22" (1/1) ... [2022-03-15 16:13:22,538 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 16:13:22,539 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 16:13:22,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 16:13:22,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 16:13:22,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 16:13:22,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:13:22" (1/1) ... [2022-03-15 16:13:22,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:13:22" (1/1) ... [2022-03-15 16:13:22,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:13:22" (1/1) ... [2022-03-15 16:13:22,545 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:13:22" (1/1) ... [2022-03-15 16:13:22,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:13:22" (1/1) ... [2022-03-15 16:13:22,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:13:22" (1/1) ... [2022-03-15 16:13:22,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:13:22" (1/1) ... [2022-03-15 16:13:22,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 16:13:22,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 16:13:22,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 16:13:22,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 16:13:22,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:13:22" (1/1) ... [2022-03-15 16:13:22,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:13:22,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:22,579 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) [2022-03-15 16:13:22,593 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 [2022-03-15 16:13:22,611 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 16:13:22,611 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 16:13:22,611 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 16:13:22,611 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 16:13:22,611 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 16:13:22,611 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 16:13:22,611 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 16:13:22,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 16:13:22,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 16:13:22,612 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 16:13:22,642 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 16:13:22,643 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 16:13:22,702 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 16:13:22,712 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 16:13:22,713 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 16:13:22,714 INFO L202 PluginConnector]: Adding new model figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:13:22 BoogieIcfgContainer [2022-03-15 16:13:22,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 16:13:22,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 16:13:22,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 16:13:22,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 16:13:22,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:13:22" (1/2) ... [2022-03-15 16:13:22,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@385306a4 and model type figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 04:13:22, skipping insertion in model container [2022-03-15 16:13:22,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:13:22" (2/2) ... [2022-03-15 16:13:22,719 INFO L111 eAbstractionObserver]: Analyzing ICFG figure1.wvr.bpl [2022-03-15 16:13:22,723 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 16:13:22,723 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 16:13:22,723 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 16:13:22,723 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 16:13:22,744 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 16:13:22,772 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 16:13:22,777 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, 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, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 16:13:22,777 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 16:13:22,785 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2022-03-15 16:13:22,803 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-03-15 16:13:22,805 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-03-15 16:13:22,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 16:13:22,810 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:22,810 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:22,811 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:22,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:22,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1212787643, now seen corresponding path program 1 times [2022-03-15 16:13:22,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:22,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178378302] [2022-03-15 16:13:22,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:22,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:22,956 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:22,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178378302] [2022-03-15 16:13:22,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178378302] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:13:22,956 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:13:22,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:13:22,958 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496222530] [2022-03-15 16:13:22,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:13:22,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:13:22,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:23,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:13:23,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:13:23,039 INFO L87 Difference]: Start difference. First operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) Second operand has 3 states, 3 states have (on average 4.666666666666667) 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) [2022-03-15 16:13:23,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:23,077 INFO L93 Difference]: Finished difference Result 57 states and 100 transitions. [2022-03-15 16:13:23,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:13:23,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) 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 [2022-03-15 16:13:23,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:23,088 INFO L225 Difference]: With dead ends: 57 [2022-03-15 16:13:23,088 INFO L226 Difference]: Without dead ends: 42 [2022-03-15 16:13:23,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:13:23,092 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:23,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:13:23,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-15 16:13:23,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-03-15 16:13:23,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 39 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) [2022-03-15 16:13:23,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 71 transitions. [2022-03-15 16:13:23,118 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 71 transitions. Word has length 14 [2022-03-15 16:13:23,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:23,118 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 71 transitions. [2022-03-15 16:13:23,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) 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) [2022-03-15 16:13:23,118 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 71 transitions. [2022-03-15 16:13:23,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 16:13:23,119 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:23,119 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:23,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 16:13:23,119 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:23,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:23,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1488322375, now seen corresponding path program 1 times [2022-03-15 16:13:23,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:23,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240816870] [2022-03-15 16:13:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:23,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:23,235 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:23,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240816870] [2022-03-15 16:13:23,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240816870] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:23,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752700210] [2022-03-15 16:13:23,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:23,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:23,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:23,239 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) [2022-03-15 16:13:23,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 16:13:23,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:23,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:13:23,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:23,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:23,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752700210] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:23,526 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 16:13:23,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2022-03-15 16:13:23,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405876341] [2022-03-15 16:13:23,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:13:23,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:13:23,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:23,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:13:23,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:13:23,532 INFO L87 Difference]: Start difference. First operand 40 states and 71 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:23,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:23,623 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2022-03-15 16:13:23,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 16:13:23,623 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 16:13:23,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:23,624 INFO L225 Difference]: With dead ends: 75 [2022-03-15 16:13:23,624 INFO L226 Difference]: Without dead ends: 75 [2022-03-15 16:13:23,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:13:23,626 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 60 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:23,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 28 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:13:23,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-15 16:13:23,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2022-03-15 16:13:23,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 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) [2022-03-15 16:13:23,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 80 transitions. [2022-03-15 16:13:23,631 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 80 transitions. Word has length 16 [2022-03-15 16:13:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:23,632 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 80 transitions. [2022-03-15 16:13:23,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:23,632 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 80 transitions. [2022-03-15 16:13:23,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 16:13:23,632 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:23,632 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:23,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-15 16:13:23,847 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 [2022-03-15 16:13:23,848 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:23,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:23,848 INFO L85 PathProgramCache]: Analyzing trace with hash -841147161, now seen corresponding path program 2 times [2022-03-15 16:13:23,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:23,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654466131] [2022-03-15 16:13:23,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:23,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:23,894 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:23,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654466131] [2022-03-15 16:13:23,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654466131] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:13:23,894 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:13:23,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 16:13:23,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043710070] [2022-03-15 16:13:23,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:13:23,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:13:23,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:23,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:13:23,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:13:23,901 INFO L87 Difference]: Start difference. First operand 45 states and 80 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:23,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:23,986 INFO L93 Difference]: Finished difference Result 50 states and 88 transitions. [2022-03-15 16:13:23,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:13:23,987 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 16:13:23,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:23,991 INFO L225 Difference]: With dead ends: 50 [2022-03-15 16:13:23,991 INFO L226 Difference]: Without dead ends: 48 [2022-03-15 16:13:23,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:13:23,994 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:23,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 19 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:13:23,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-15 16:13:23,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2022-03-15 16:13:23,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:23,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 76 transitions. [2022-03-15 16:13:23,998 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 76 transitions. Word has length 16 [2022-03-15 16:13:23,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:23,998 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 76 transitions. [2022-03-15 16:13:23,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:23,999 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 76 transitions. [2022-03-15 16:13:23,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:13:23,999 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:23,999 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:23,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 16:13:23,999 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:24,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:24,000 INFO L85 PathProgramCache]: Analyzing trace with hash -976918153, now seen corresponding path program 1 times [2022-03-15 16:13:24,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:24,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759634555] [2022-03-15 16:13:24,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:24,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:24,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:24,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759634555] [2022-03-15 16:13:24,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759634555] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:24,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199045791] [2022-03-15 16:13:24,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:24,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:24,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:24,057 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) [2022-03-15 16:13:24,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 16:13:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:24,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:13:24,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:24,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:24,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199045791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:24,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:24,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-03-15 16:13:24,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873068489] [2022-03-15 16:13:24,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:24,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:13:24,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:24,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:13:24,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:13:24,223 INFO L87 Difference]: Start difference. First operand 43 states and 76 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:24,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:24,249 INFO L93 Difference]: Finished difference Result 96 states and 173 transitions. [2022-03-15 16:13:24,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:13:24,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:13:24,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:24,250 INFO L225 Difference]: With dead ends: 96 [2022-03-15 16:13:24,250 INFO L226 Difference]: Without dead ends: 75 [2022-03-15 16:13:24,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:13:24,251 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:24,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:13:24,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-15 16:13:24,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2022-03-15 16:13:24,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:24,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 109 transitions. [2022-03-15 16:13:24,256 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 109 transitions. Word has length 18 [2022-03-15 16:13:24,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:24,256 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 109 transitions. [2022-03-15 16:13:24,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:24,256 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 109 transitions. [2022-03-15 16:13:24,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:13:24,257 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:24,257 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:24,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-15 16:13:24,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-15 16:13:24,464 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:24,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:24,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1383534453, now seen corresponding path program 2 times [2022-03-15 16:13:24,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:24,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507938834] [2022-03-15 16:13:24,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:24,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:24,545 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:24,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507938834] [2022-03-15 16:13:24,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507938834] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:24,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326054226] [2022-03-15 16:13:24,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:13:24,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:24,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:24,547 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) [2022-03-15 16:13:24,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 16:13:24,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:13:24,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:24,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:13:24,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:24,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:24,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:24,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326054226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:24,786 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:24,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-03-15 16:13:24,786 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247260911] [2022-03-15 16:13:24,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:24,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:13:24,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:24,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:13:24,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:13:24,795 INFO L87 Difference]: Start difference. First operand 58 states and 109 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2022-03-15 16:13:25,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:25,164 INFO L93 Difference]: Finished difference Result 183 states and 329 transitions. [2022-03-15 16:13:25,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:13:25,165 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 20 [2022-03-15 16:13:25,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:25,166 INFO L225 Difference]: With dead ends: 183 [2022-03-15 16:13:25,166 INFO L226 Difference]: Without dead ends: 177 [2022-03-15 16:13:25,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:13:25,168 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 125 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:25,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 109 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:13:25,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-15 16:13:25,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 67. [2022-03-15 16:13:25,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:25,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 129 transitions. [2022-03-15 16:13:25,188 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 129 transitions. Word has length 20 [2022-03-15 16:13:25,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:25,188 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 129 transitions. [2022-03-15 16:13:25,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2022-03-15 16:13:25,189 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 129 transitions. [2022-03-15 16:13:25,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:13:25,189 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:25,189 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:25,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:25,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:25,390 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:25,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:25,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1633346791, now seen corresponding path program 3 times [2022-03-15 16:13:25,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:25,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401875160] [2022-03-15 16:13:25,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:25,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:25,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:25,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:25,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:25,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401875160] [2022-03-15 16:13:25,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401875160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:25,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870192669] [2022-03-15 16:13:25,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:13:25,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:25,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:25,444 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) [2022-03-15 16:13:25,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 16:13:25,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:13:25,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:25,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:13:25,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:25,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:25,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870192669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:25,652 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:25,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-03-15 16:13:25,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996059793] [2022-03-15 16:13:25,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:25,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:13:25,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:25,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:13:25,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:13:25,654 INFO L87 Difference]: Start difference. First operand 67 states and 129 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:25,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:25,888 INFO L93 Difference]: Finished difference Result 145 states and 267 transitions. [2022-03-15 16:13:25,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:13:25,888 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:13:25,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:25,889 INFO L225 Difference]: With dead ends: 145 [2022-03-15 16:13:25,889 INFO L226 Difference]: Without dead ends: 141 [2022-03-15 16:13:25,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:13:25,890 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 108 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:25,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 51 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:13:25,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-15 16:13:25,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 66. [2022-03-15 16:13:25,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 65 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:25,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 126 transitions. [2022-03-15 16:13:25,893 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 126 transitions. Word has length 20 [2022-03-15 16:13:25,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:25,893 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 126 transitions. [2022-03-15 16:13:25,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:25,894 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 126 transitions. [2022-03-15 16:13:25,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:13:25,894 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:25,894 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:25,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:26,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:26,103 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:26,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:26,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1508489523, now seen corresponding path program 4 times [2022-03-15 16:13:26,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:26,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216814934] [2022-03-15 16:13:26,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:26,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:26,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:26,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216814934] [2022-03-15 16:13:26,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216814934] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:26,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947656440] [2022-03-15 16:13:26,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:13:26,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:26,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:26,164 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) [2022-03-15 16:13:26,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 16:13:26,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:13:26,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:26,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:13:26,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:26,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:26,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:26,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947656440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:26,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:26,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-03-15 16:13:26,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271326181] [2022-03-15 16:13:26,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:26,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:13:26,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:26,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:13:26,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:13:26,314 INFO L87 Difference]: Start difference. First operand 66 states and 126 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:26,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:26,342 INFO L93 Difference]: Finished difference Result 162 states and 309 transitions. [2022-03-15 16:13:26,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:13:26,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:13:26,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:26,343 INFO L225 Difference]: With dead ends: 162 [2022-03-15 16:13:26,343 INFO L226 Difference]: Without dead ends: 135 [2022-03-15 16:13:26,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:13:26,344 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:26,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 80 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:13:26,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-15 16:13:26,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2022-03-15 16:13:26,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.048076923076923) internal successors, (213), 104 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:26,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 213 transitions. [2022-03-15 16:13:26,348 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 213 transitions. Word has length 22 [2022-03-15 16:13:26,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:26,348 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 213 transitions. [2022-03-15 16:13:26,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:26,348 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 213 transitions. [2022-03-15 16:13:26,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:13:26,349 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:26,349 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:26,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:26,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:26,563 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:26,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:26,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1228681265, now seen corresponding path program 5 times [2022-03-15 16:13:26,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:26,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893770371] [2022-03-15 16:13:26,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:26,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:26,640 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:26,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893770371] [2022-03-15 16:13:26,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893770371] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:26,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971670947] [2022-03-15 16:13:26,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:13:26,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:26,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:26,642 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) [2022-03-15 16:13:26,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 16:13:26,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:13:26,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:26,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 16:13:26,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:26,816 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:26,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:26,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971670947] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:26,908 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:26,908 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-03-15 16:13:26,908 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582376152] [2022-03-15 16:13:26,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:26,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:13:26,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:26,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:13:26,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:13:26,910 INFO L87 Difference]: Start difference. First operand 105 states and 213 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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) [2022-03-15 16:13:27,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:27,454 INFO L93 Difference]: Finished difference Result 383 states and 726 transitions. [2022-03-15 16:13:27,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 16:13:27,454 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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 24 [2022-03-15 16:13:27,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:27,456 INFO L225 Difference]: With dead ends: 383 [2022-03-15 16:13:27,456 INFO L226 Difference]: Without dead ends: 347 [2022-03-15 16:13:27,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=652, Invalid=1798, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:13:27,458 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 225 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:27,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 116 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:13:27,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-03-15 16:13:27,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 92. [2022-03-15 16:13:27,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.967032967032967) internal successors, (179), 91 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:27,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 179 transitions. [2022-03-15 16:13:27,463 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 179 transitions. Word has length 24 [2022-03-15 16:13:27,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:27,464 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 179 transitions. [2022-03-15 16:13:27,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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) [2022-03-15 16:13:27,464 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 179 transitions. [2022-03-15 16:13:27,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:13:27,465 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:27,465 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:27,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:27,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:27,684 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:27,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:27,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1864859111, now seen corresponding path program 6 times [2022-03-15 16:13:27,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:27,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719448276] [2022-03-15 16:13:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:27,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:27,740 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:27,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719448276] [2022-03-15 16:13:27,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719448276] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:27,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753506395] [2022-03-15 16:13:27,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:13:27,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:27,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:27,742 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) [2022-03-15 16:13:27,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 16:13:27,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:13:27,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:27,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 16:13:27,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:27,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:28,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:28,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753506395] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:28,041 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:28,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-03-15 16:13:28,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899160778] [2022-03-15 16:13:28,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:28,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:13:28,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:28,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:13:28,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:13:28,042 INFO L87 Difference]: Start difference. First operand 92 states and 179 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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) [2022-03-15 16:13:28,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:28,485 INFO L93 Difference]: Finished difference Result 239 states and 453 transitions. [2022-03-15 16:13:28,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:13:28,486 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 24 [2022-03-15 16:13:28,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:28,487 INFO L225 Difference]: With dead ends: 239 [2022-03-15 16:13:28,487 INFO L226 Difference]: Without dead ends: 235 [2022-03-15 16:13:28,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:13:28,489 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 177 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:28,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 71 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:13:28,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-03-15 16:13:28,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 84. [2022-03-15 16:13:28,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.9759036144578312) internal successors, (164), 83 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:28,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 164 transitions. [2022-03-15 16:13:28,493 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 164 transitions. Word has length 24 [2022-03-15 16:13:28,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:28,493 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 164 transitions. [2022-03-15 16:13:28,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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) [2022-03-15 16:13:28,493 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 164 transitions. [2022-03-15 16:13:28,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:13:28,494 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:28,494 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:28,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:28,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:28,719 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:28,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:28,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1276536081, now seen corresponding path program 7 times [2022-03-15 16:13:28,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:28,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456538274] [2022-03-15 16:13:28,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:28,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:28,768 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:28,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456538274] [2022-03-15 16:13:28,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456538274] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:28,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764607393] [2022-03-15 16:13:28,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:13:28,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:28,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:28,776 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) [2022-03-15 16:13:28,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 16:13:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:28,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 16:13:28,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:28,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:28,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764607393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:28,955 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:28,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-03-15 16:13:28,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214429668] [2022-03-15 16:13:28,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:28,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:13:28,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:28,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:13:28,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:13:28,956 INFO L87 Difference]: Start difference. First operand 84 states and 164 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) 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) [2022-03-15 16:13:28,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:28,991 INFO L93 Difference]: Finished difference Result 221 states and 426 transitions. [2022-03-15 16:13:28,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:13:28,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) 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 26 [2022-03-15 16:13:28,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:28,992 INFO L225 Difference]: With dead ends: 221 [2022-03-15 16:13:28,992 INFO L226 Difference]: Without dead ends: 188 [2022-03-15 16:13:28,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:13:28,993 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 29 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:28,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 132 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:13:28,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-15 16:13:28,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 145. [2022-03-15 16:13:28,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.0833333333333335) internal successors, (300), 144 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:28,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 300 transitions. [2022-03-15 16:13:28,996 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 300 transitions. Word has length 26 [2022-03-15 16:13:28,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:28,996 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 300 transitions. [2022-03-15 16:13:28,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) 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) [2022-03-15 16:13:28,996 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 300 transitions. [2022-03-15 16:13:28,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:13:28,997 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:28,997 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:29,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:29,207 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,SelfDestructingSolverStorable9 [2022-03-15 16:13:29,207 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:29,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:29,208 INFO L85 PathProgramCache]: Analyzing trace with hash 923558637, now seen corresponding path program 8 times [2022-03-15 16:13:29,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:29,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740811389] [2022-03-15 16:13:29,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:29,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:29,311 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:29,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740811389] [2022-03-15 16:13:29,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740811389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:29,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210612515] [2022-03-15 16:13:29,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:13:29,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:29,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:29,312 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) [2022-03-15 16:13:29,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 16:13:29,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:13:29,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:29,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:13:29,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:29,527 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:29,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:29,650 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:29,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210612515] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:29,651 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:29,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-03-15 16:13:29,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473372986] [2022-03-15 16:13:29,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:29,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:13:29,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:29,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:13:29,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:13:29,652 INFO L87 Difference]: Start difference. First operand 145 states and 300 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 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) [2022-03-15 16:13:30,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:30,544 INFO L93 Difference]: Finished difference Result 613 states and 1172 transitions. [2022-03-15 16:13:30,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 16:13:30,544 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 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 28 [2022-03-15 16:13:30,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:30,546 INFO L225 Difference]: With dead ends: 613 [2022-03-15 16:13:30,546 INFO L226 Difference]: Without dead ends: 520 [2022-03-15 16:13:30,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1238, Invalid=3592, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 16:13:30,548 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 385 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:30,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 137 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:13:30,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-03-15 16:13:30,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 114. [2022-03-15 16:13:30,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.991150442477876) internal successors, (225), 113 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:30,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 225 transitions. [2022-03-15 16:13:30,552 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 225 transitions. Word has length 28 [2022-03-15 16:13:30,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:30,553 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 225 transitions. [2022-03-15 16:13:30,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 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) [2022-03-15 16:13:30,553 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 225 transitions. [2022-03-15 16:13:30,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:13:30,553 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:30,553 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:30,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:30,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:30,772 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:30,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:30,772 INFO L85 PathProgramCache]: Analyzing trace with hash -805165081, now seen corresponding path program 9 times [2022-03-15 16:13:30,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:30,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254747086] [2022-03-15 16:13:30,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:30,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:30,839 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:30,840 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:30,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254747086] [2022-03-15 16:13:30,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254747086] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:30,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862459315] [2022-03-15 16:13:30,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:13:30,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:30,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:30,841 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) [2022-03-15 16:13:30,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 16:13:30,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 16:13:30,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:30,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:13:30,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:31,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:31,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862459315] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:31,207 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:31,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-03-15 16:13:31,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34957939] [2022-03-15 16:13:31,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:31,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:13:31,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:31,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:13:31,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:13:31,208 INFO L87 Difference]: Start difference. First operand 114 states and 225 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 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) [2022-03-15 16:13:31,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:31,810 INFO L93 Difference]: Finished difference Result 351 states and 677 transitions. [2022-03-15 16:13:31,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:13:31,811 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 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 28 [2022-03-15 16:13:31,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:31,812 INFO L225 Difference]: With dead ends: 351 [2022-03-15 16:13:31,812 INFO L226 Difference]: Without dead ends: 347 [2022-03-15 16:13:31,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=981, Invalid=2441, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 16:13:31,813 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 268 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:31,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 59 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:13:31,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-03-15 16:13:31,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 102. [2022-03-15 16:13:31,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:31,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2022-03-15 16:13:31,816 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 28 [2022-03-15 16:13:31,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:31,816 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2022-03-15 16:13:31,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 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) [2022-03-15 16:13:31,816 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2022-03-15 16:13:31,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:13:31,817 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:31,817 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:31,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:32,017 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,SelfDestructingSolverStorable11 [2022-03-15 16:13:32,017 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:32,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:32,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1853361835, now seen corresponding path program 10 times [2022-03-15 16:13:32,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:32,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160799658] [2022-03-15 16:13:32,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:32,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:32,075 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:32,075 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:32,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160799658] [2022-03-15 16:13:32,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160799658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:32,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077547169] [2022-03-15 16:13:32,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:13:32,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:32,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:32,076 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) [2022-03-15 16:13:32,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 16:13:32,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:13:32,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:32,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:13:32,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:32,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:32,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077547169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:32,275 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:32,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-03-15 16:13:32,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953606827] [2022-03-15 16:13:32,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:32,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 16:13:32,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:32,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 16:13:32,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:13:32,276 INFO L87 Difference]: Start difference. First operand 102 states and 202 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) 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) [2022-03-15 16:13:32,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:32,339 INFO L93 Difference]: Finished difference Result 280 states and 543 transitions. [2022-03-15 16:13:32,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:13:32,339 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) 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 30 [2022-03-15 16:13:32,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:32,340 INFO L225 Difference]: With dead ends: 280 [2022-03-15 16:13:32,341 INFO L226 Difference]: Without dead ends: 241 [2022-03-15 16:13:32,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:13:32,341 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 38 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:32,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 198 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:13:32,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-03-15 16:13:32,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 185. [2022-03-15 16:13:32,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.1032608695652173) internal successors, (387), 184 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:32,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 387 transitions. [2022-03-15 16:13:32,346 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 387 transitions. Word has length 30 [2022-03-15 16:13:32,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:32,346 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 387 transitions. [2022-03-15 16:13:32,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) 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) [2022-03-15 16:13:32,346 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 387 transitions. [2022-03-15 16:13:32,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:13:32,347 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:32,347 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:32,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:32,555 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,SelfDestructingSolverStorable12 [2022-03-15 16:13:32,555 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:32,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:32,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1831163991, now seen corresponding path program 11 times [2022-03-15 16:13:32,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:32,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204724975] [2022-03-15 16:13:32,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:32,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:32,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:32,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:32,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204724975] [2022-03-15 16:13:32,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204724975] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:32,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676755962] [2022-03-15 16:13:32,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:13:32,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:32,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:32,663 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) [2022-03-15 16:13:32,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 16:13:32,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:13:32,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:32,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:13:32,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:32,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:33,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676755962] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:33,080 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:33,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-15 16:13:33,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290596005] [2022-03-15 16:13:33,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:33,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:13:33,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:33,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:13:33,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:13:33,081 INFO L87 Difference]: Start difference. First operand 185 states and 387 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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) [2022-03-15 16:13:34,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:34,390 INFO L93 Difference]: Finished difference Result 889 states and 1704 transitions. [2022-03-15 16:13:34,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-15 16:13:34,393 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 32 [2022-03-15 16:13:34,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:34,395 INFO L225 Difference]: With dead ends: 889 [2022-03-15 16:13:34,395 INFO L226 Difference]: Without dead ends: 724 [2022-03-15 16:13:34,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2535 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2144, Invalid=6412, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 16:13:34,397 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 372 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:34,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 160 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:13:34,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-03-15 16:13:34,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 136. [2022-03-15 16:13:34,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.0074074074074075) internal successors, (271), 135 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:34,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 271 transitions. [2022-03-15 16:13:34,402 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 271 transitions. Word has length 32 [2022-03-15 16:13:34,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:34,403 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 271 transitions. [2022-03-15 16:13:34,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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) [2022-03-15 16:13:34,403 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 271 transitions. [2022-03-15 16:13:34,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:13:34,403 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:34,403 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:34,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:34,619 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,SelfDestructingSolverStorable13 [2022-03-15 16:13:34,619 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:34,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:34,620 INFO L85 PathProgramCache]: Analyzing trace with hash 102376167, now seen corresponding path program 12 times [2022-03-15 16:13:34,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:34,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650644822] [2022-03-15 16:13:34,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:34,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:34,692 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:34,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650644822] [2022-03-15 16:13:34,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650644822] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:34,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631196357] [2022-03-15 16:13:34,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:13:34,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:34,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:34,694 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) [2022-03-15 16:13:34,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 16:13:34,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 16:13:34,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:34,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:13:34,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:34,933 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:34,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:35,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631196357] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:35,128 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:35,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 29 [2022-03-15 16:13:35,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687656537] [2022-03-15 16:13:35,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:35,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:13:35,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:35,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:13:35,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:13:35,129 INFO L87 Difference]: Start difference. First operand 136 states and 271 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:36,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:36,056 INFO L93 Difference]: Finished difference Result 485 states and 945 transitions. [2022-03-15 16:13:36,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 16:13:36,057 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:13:36,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:36,058 INFO L225 Difference]: With dead ends: 485 [2022-03-15 16:13:36,058 INFO L226 Difference]: Without dead ends: 481 [2022-03-15 16:13:36,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1634, Invalid=4218, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 16:13:36,060 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 356 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:36,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 85 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:13:36,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-03-15 16:13:36,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 120. [2022-03-15 16:13:36,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0168067226890756) internal successors, (240), 119 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:36,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 240 transitions. [2022-03-15 16:13:36,064 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 240 transitions. Word has length 32 [2022-03-15 16:13:36,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:36,064 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 240 transitions. [2022-03-15 16:13:36,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:36,064 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 240 transitions. [2022-03-15 16:13:36,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:13:36,064 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:36,064 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:36,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:36,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-15 16:13:36,275 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:36,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:36,276 INFO L85 PathProgramCache]: Analyzing trace with hash 264770663, now seen corresponding path program 13 times [2022-03-15 16:13:36,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:36,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285141638] [2022-03-15 16:13:36,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:36,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:36,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:36,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285141638] [2022-03-15 16:13:36,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285141638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:36,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727766407] [2022-03-15 16:13:36,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:13:36,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:36,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:36,337 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) [2022-03-15 16:13:36,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 16:13:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:36,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:13:36,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:36,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:36,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727766407] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:36,562 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:36,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-03-15 16:13:36,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956983059] [2022-03-15 16:13:36,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:36,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 16:13:36,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:36,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 16:13:36,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:13:36,565 INFO L87 Difference]: Start difference. First operand 120 states and 240 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:36,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:36,646 INFO L93 Difference]: Finished difference Result 339 states and 660 transitions. [2022-03-15 16:13:36,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 16:13:36,646 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:13:36,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:36,648 INFO L225 Difference]: With dead ends: 339 [2022-03-15 16:13:36,648 INFO L226 Difference]: Without dead ends: 294 [2022-03-15 16:13:36,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:13:36,648 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 47 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:36,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 278 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:13:36,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-03-15 16:13:36,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 225. [2022-03-15 16:13:36,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.1160714285714284) internal successors, (474), 224 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:36,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 474 transitions. [2022-03-15 16:13:36,652 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 474 transitions. Word has length 34 [2022-03-15 16:13:36,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:36,652 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 474 transitions. [2022-03-15 16:13:36,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:36,652 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 474 transitions. [2022-03-15 16:13:36,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:13:36,653 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:36,653 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:36,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-15 16:13:36,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:36,867 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:36,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:36,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1625686427, now seen corresponding path program 14 times [2022-03-15 16:13:36,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:36,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695295583] [2022-03-15 16:13:36,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:36,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:37,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:37,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695295583] [2022-03-15 16:13:37,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695295583] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:37,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914630931] [2022-03-15 16:13:37,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:13:37,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:37,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:37,012 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) [2022-03-15 16:13:37,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 16:13:37,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:13:37,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:37,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 16:13:37,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:37,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:37,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914630931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:37,507 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:37,507 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 35 [2022-03-15 16:13:37,507 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528776642] [2022-03-15 16:13:37,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:37,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:13:37,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:37,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:13:37,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:13:37,508 INFO L87 Difference]: Start difference. First operand 225 states and 474 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:39,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:39,377 INFO L93 Difference]: Finished difference Result 1205 states and 2312 transitions. [2022-03-15 16:13:39,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-15 16:13:39,378 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:13:39,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:39,380 INFO L225 Difference]: With dead ends: 1205 [2022-03-15 16:13:39,381 INFO L226 Difference]: Without dead ends: 956 [2022-03-15 16:13:39,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4408 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3470, Invalid=10572, Unknown=0, NotChecked=0, Total=14042 [2022-03-15 16:13:39,384 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 455 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:39,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 197 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:13:39,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-03-15 16:13:39,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 158. [2022-03-15 16:13:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.0191082802547773) internal successors, (317), 157 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:39,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 317 transitions. [2022-03-15 16:13:39,390 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 317 transitions. Word has length 36 [2022-03-15 16:13:39,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:39,390 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 317 transitions. [2022-03-15 16:13:39,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:39,391 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 317 transitions. [2022-03-15 16:13:39,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:13:39,391 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:39,391 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:39,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:39,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-15 16:13:39,607 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:39,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:39,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2129744153, now seen corresponding path program 15 times [2022-03-15 16:13:39,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:39,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250560451] [2022-03-15 16:13:39,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:39,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:39,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:39,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250560451] [2022-03-15 16:13:39,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250560451] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:39,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131643373] [2022-03-15 16:13:39,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:13:39,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:39,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:39,705 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) [2022-03-15 16:13:39,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 16:13:39,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 16:13:39,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:39,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 16:13:39,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:40,019 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:40,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:40,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131643373] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:40,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:40,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 34 [2022-03-15 16:13:40,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73822557] [2022-03-15 16:13:40,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:40,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:13:40,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:40,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:13:40,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:13:40,237 INFO L87 Difference]: Start difference. First operand 158 states and 317 transitions. Second operand has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:41,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:41,514 INFO L93 Difference]: Finished difference Result 641 states and 1257 transitions. [2022-03-15 16:13:41,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-15 16:13:41,514 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:13:41,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:41,516 INFO L225 Difference]: With dead ends: 641 [2022-03-15 16:13:41,516 INFO L226 Difference]: Without dead ends: 637 [2022-03-15 16:13:41,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2833 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2553, Invalid=6759, Unknown=0, NotChecked=0, Total=9312 [2022-03-15 16:13:41,519 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 432 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:41,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 85 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:13:41,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-03-15 16:13:41,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 138. [2022-03-15 16:13:41,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0291970802919708) internal successors, (278), 137 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:41,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 278 transitions. [2022-03-15 16:13:41,524 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 278 transitions. Word has length 36 [2022-03-15 16:13:41,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:41,524 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 278 transitions. [2022-03-15 16:13:41,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:41,524 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 278 transitions. [2022-03-15 16:13:41,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-15 16:13:41,524 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:41,524 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:41,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-15 16:13:41,740 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,SelfDestructingSolverStorable17 [2022-03-15 16:13:41,740 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:41,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:41,741 INFO L85 PathProgramCache]: Analyzing trace with hash 160214051, now seen corresponding path program 16 times [2022-03-15 16:13:41,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:41,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086326997] [2022-03-15 16:13:41,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:41,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:41,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:41,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086326997] [2022-03-15 16:13:41,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086326997] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:41,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832306072] [2022-03-15 16:13:41,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:13:41,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:41,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:41,832 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) [2022-03-15 16:13:41,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 16:13:41,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:13:41,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:41,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:13:41,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:41,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:42,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832306072] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:42,071 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:42,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2022-03-15 16:13:42,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283295370] [2022-03-15 16:13:42,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:42,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:13:42,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:42,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:13:42,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:13:42,073 INFO L87 Difference]: Start difference. First operand 138 states and 278 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:42,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:42,201 INFO L93 Difference]: Finished difference Result 398 states and 777 transitions. [2022-03-15 16:13:42,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:13:42,201 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:13:42,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:42,202 INFO L225 Difference]: With dead ends: 398 [2022-03-15 16:13:42,202 INFO L226 Difference]: Without dead ends: 347 [2022-03-15 16:13:42,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:13:42,204 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 56 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:42,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 372 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:13:42,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-03-15 16:13:42,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 265. [2022-03-15 16:13:42,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.125) internal successors, (561), 264 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:42,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 561 transitions. [2022-03-15 16:13:42,211 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 561 transitions. Word has length 38 [2022-03-15 16:13:42,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:42,212 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 561 transitions. [2022-03-15 16:13:42,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:42,212 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 561 transitions. [2022-03-15 16:13:42,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-15 16:13:42,212 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:42,213 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:42,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:42,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:42,443 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:42,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:42,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1774020385, now seen corresponding path program 17 times [2022-03-15 16:13:42,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:42,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816275275] [2022-03-15 16:13:42,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:42,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:42,615 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:42,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816275275] [2022-03-15 16:13:42,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816275275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:42,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848797311] [2022-03-15 16:13:42,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:13:42,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:42,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:42,618 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) [2022-03-15 16:13:42,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 16:13:42,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 16:13:42,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:42,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 16:13:42,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:42,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:43,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848797311] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:43,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:43,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 40 [2022-03-15 16:13:43,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031200839] [2022-03-15 16:13:43,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:43,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:13:43,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:43,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:13:43,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:13:43,193 INFO L87 Difference]: Start difference. First operand 265 states and 561 transitions. Second operand has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:45,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:45,671 INFO L93 Difference]: Finished difference Result 1561 states and 2996 transitions. [2022-03-15 16:13:45,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-15 16:13:45,671 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-15 16:13:45,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:45,674 INFO L225 Difference]: With dead ends: 1561 [2022-03-15 16:13:45,674 INFO L226 Difference]: Without dead ends: 1216 [2022-03-15 16:13:45,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7201 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5330, Invalid=16426, Unknown=0, NotChecked=0, Total=21756 [2022-03-15 16:13:45,677 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 540 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:45,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 218 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:13:45,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2022-03-15 16:13:45,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 180. [2022-03-15 16:13:45,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.0279329608938546) internal successors, (363), 179 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:45,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 363 transitions. [2022-03-15 16:13:45,684 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 363 transitions. Word has length 40 [2022-03-15 16:13:45,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:45,685 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 363 transitions. [2022-03-15 16:13:45,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:45,685 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 363 transitions. [2022-03-15 16:13:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-15 16:13:45,685 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:45,685 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:45,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:45,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:45,899 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:45,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:45,900 INFO L85 PathProgramCache]: Analyzing trace with hash -504427545, now seen corresponding path program 18 times [2022-03-15 16:13:45,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:45,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556892943] [2022-03-15 16:13:45,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:45,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:46,015 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:46,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:46,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556892943] [2022-03-15 16:13:46,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556892943] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:46,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516279006] [2022-03-15 16:13:46,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:13:46,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:46,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:46,017 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) [2022-03-15 16:13:46,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 16:13:46,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-15 16:13:46,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:46,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 16:13:46,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:46,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:46,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516279006] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:46,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:46,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 39 [2022-03-15 16:13:46,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175510428] [2022-03-15 16:13:46,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:46,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 16:13:46,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:46,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 16:13:46,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1156, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:13:46,631 INFO L87 Difference]: Start difference. First operand 180 states and 363 transitions. Second operand has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:48,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:48,221 INFO L93 Difference]: Finished difference Result 819 states and 1613 transitions. [2022-03-15 16:13:48,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-15 16:13:48,221 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-15 16:13:48,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:48,223 INFO L225 Difference]: With dead ends: 819 [2022-03-15 16:13:48,223 INFO L226 Difference]: Without dead ends: 815 [2022-03-15 16:13:48,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4486 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3799, Invalid=10243, Unknown=0, NotChecked=0, Total=14042 [2022-03-15 16:13:48,225 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 394 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:48,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 100 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:13:48,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-03-15 16:13:48,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 156. [2022-03-15 16:13:48,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.0387096774193547) internal successors, (316), 155 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:48,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 316 transitions. [2022-03-15 16:13:48,230 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 316 transitions. Word has length 40 [2022-03-15 16:13:48,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:48,230 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 316 transitions. [2022-03-15 16:13:48,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:48,230 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 316 transitions. [2022-03-15 16:13:48,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-15 16:13:48,230 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:48,230 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:48,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:48,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:48,441 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:48,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:48,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1191651873, now seen corresponding path program 19 times [2022-03-15 16:13:48,441 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:48,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971080157] [2022-03-15 16:13:48,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:48,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:48,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:48,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971080157] [2022-03-15 16:13:48,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971080157] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:48,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917074108] [2022-03-15 16:13:48,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:13:48,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:48,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:48,523 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) [2022-03-15 16:13:48,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 16:13:48,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:48,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:13:48,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:48,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:48,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917074108] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:48,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:48,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2022-03-15 16:13:48,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227534812] [2022-03-15 16:13:48,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:48,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:13:48,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:48,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:13:48,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:13:48,801 INFO L87 Difference]: Start difference. First operand 156 states and 316 transitions. Second operand has 10 states, 10 states have (on average 4.2) 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) [2022-03-15 16:13:48,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:48,924 INFO L93 Difference]: Finished difference Result 457 states and 894 transitions. [2022-03-15 16:13:48,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:13:48,925 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) 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 42 [2022-03-15 16:13:48,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:48,926 INFO L225 Difference]: With dead ends: 457 [2022-03-15 16:13:48,926 INFO L226 Difference]: Without dead ends: 400 [2022-03-15 16:13:48,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:13:48,926 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 65 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:48,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 480 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:13:48,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-03-15 16:13:48,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 305. [2022-03-15 16:13:48,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.1315789473684212) internal successors, (648), 304 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:48,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 648 transitions. [2022-03-15 16:13:48,931 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 648 transitions. Word has length 42 [2022-03-15 16:13:48,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:48,931 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 648 transitions. [2022-03-15 16:13:48,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) 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) [2022-03-15 16:13:48,931 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 648 transitions. [2022-03-15 16:13:48,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:13:48,932 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:48,932 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:48,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:49,148 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,SelfDestructingSolverStorable21 [2022-03-15 16:13:49,149 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:49,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:49,149 INFO L85 PathProgramCache]: Analyzing trace with hash -868752931, now seen corresponding path program 20 times [2022-03-15 16:13:49,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:49,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125473794] [2022-03-15 16:13:49,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:49,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:49,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:49,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125473794] [2022-03-15 16:13:49,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125473794] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:49,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97392681] [2022-03-15 16:13:49,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:13:49,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:49,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:49,333 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) [2022-03-15 16:13:49,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 16:13:49,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:13:49,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:49,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:13:49,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:49,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:49,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97392681] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:49,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:49,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 45 [2022-03-15 16:13:49,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489952391] [2022-03-15 16:13:49,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:49,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:13:49,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:49,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:13:49,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1667, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:13:49,963 INFO L87 Difference]: Start difference. First operand 305 states and 648 transitions. Second operand has 46 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 45 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:53,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:53,266 INFO L93 Difference]: Finished difference Result 1957 states and 3756 transitions. [2022-03-15 16:13:53,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-03-15 16:13:53,266 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 45 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:13:53,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:53,270 INFO L225 Difference]: With dead ends: 1957 [2022-03-15 16:13:53,270 INFO L226 Difference]: Without dead ends: 1504 [2022-03-15 16:13:53,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11183 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7852, Invalid=24368, Unknown=0, NotChecked=0, Total=32220 [2022-03-15 16:13:53,272 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 597 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:53,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 227 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:13:53,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2022-03-15 16:13:53,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 202. [2022-03-15 16:13:53,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.0348258706467663) internal successors, (409), 201 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:53,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 409 transitions. [2022-03-15 16:13:53,279 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 409 transitions. Word has length 44 [2022-03-15 16:13:53,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:53,280 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 409 transitions. [2022-03-15 16:13:53,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 45 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:53,280 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 409 transitions. [2022-03-15 16:13:53,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:13:53,280 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:53,280 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:53,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:53,483 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,SelfDestructingSolverStorable22 [2022-03-15 16:13:53,484 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:53,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:53,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1060796903, now seen corresponding path program 21 times [2022-03-15 16:13:53,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:53,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378371470] [2022-03-15 16:13:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:53,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:53,611 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:53,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378371470] [2022-03-15 16:13:53,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378371470] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:53,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083528450] [2022-03-15 16:13:53,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:13:53,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:53,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:53,612 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) [2022-03-15 16:13:53,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 16:13:53,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-15 16:13:53,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:53,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:13:53,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:54,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:54,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083528450] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:54,327 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:54,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19, 19] total 44 [2022-03-15 16:13:54,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632046566] [2022-03-15 16:13:54,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:54,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 16:13:54,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:54,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 16:13:54,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1475, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:13:54,329 INFO L87 Difference]: Start difference. First operand 202 states and 409 transitions. Second operand has 45 states, 45 states have (on average 2.4444444444444446) internal successors, (110), 44 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:56,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:56,434 INFO L93 Difference]: Finished difference Result 1019 states and 2013 transitions. [2022-03-15 16:13:56,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-15 16:13:56,434 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.4444444444444446) internal successors, (110), 44 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:13:56,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:56,437 INFO L225 Difference]: With dead ends: 1019 [2022-03-15 16:13:56,437 INFO L226 Difference]: Without dead ends: 1015 [2022-03-15 16:13:56,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6777 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5439, Invalid=14867, Unknown=0, NotChecked=0, Total=20306 [2022-03-15 16:13:56,438 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 761 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:56,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 105 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:13:56,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2022-03-15 16:13:56,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 174. [2022-03-15 16:13:56,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.046242774566474) internal successors, (354), 173 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:56,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 354 transitions. [2022-03-15 16:13:56,443 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 354 transitions. Word has length 44 [2022-03-15 16:13:56,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:56,443 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 354 transitions. [2022-03-15 16:13:56,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.4444444444444446) internal successors, (110), 44 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:56,443 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 354 transitions. [2022-03-15 16:13:56,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-15 16:13:56,444 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:56,444 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:56,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:56,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:56,659 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:56,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:56,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1723830683, now seen corresponding path program 22 times [2022-03-15 16:13:56,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:56,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551840115] [2022-03-15 16:13:56,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:56,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:56,763 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:56,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551840115] [2022-03-15 16:13:56,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551840115] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:56,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671570767] [2022-03-15 16:13:56,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:13:56,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:56,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:56,764 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) [2022-03-15 16:13:56,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 16:13:56,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:13:56,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:56,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:13:56,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:56,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:57,044 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:57,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671570767] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:57,044 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:57,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2022-03-15 16:13:57,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886578135] [2022-03-15 16:13:57,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:57,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 16:13:57,044 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:57,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 16:13:57,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:13:57,045 INFO L87 Difference]: Start difference. First operand 174 states and 354 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) 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) [2022-03-15 16:13:57,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:57,195 INFO L93 Difference]: Finished difference Result 516 states and 1011 transitions. [2022-03-15 16:13:57,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 16:13:57,196 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) 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 46 [2022-03-15 16:13:57,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:57,197 INFO L225 Difference]: With dead ends: 516 [2022-03-15 16:13:57,197 INFO L226 Difference]: Without dead ends: 453 [2022-03-15 16:13:57,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:13:57,198 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 74 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:57,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 602 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:13:57,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-03-15 16:13:57,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 345. [2022-03-15 16:13:57,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.136627906976744) internal successors, (735), 344 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:57,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 735 transitions. [2022-03-15 16:13:57,202 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 735 transitions. Word has length 46 [2022-03-15 16:13:57,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:57,202 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 735 transitions. [2022-03-15 16:13:57,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) 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) [2022-03-15 16:13:57,203 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 735 transitions. [2022-03-15 16:13:57,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-15 16:13:57,203 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:57,203 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:57,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-15 16:13:57,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:57,418 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:57,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:57,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1803316889, now seen corresponding path program 23 times [2022-03-15 16:13:57,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:57,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701538952] [2022-03-15 16:13:57,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:57,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:57,615 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:57,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701538952] [2022-03-15 16:13:57,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701538952] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:57,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666335530] [2022-03-15 16:13:57,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:13:57,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:57,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:57,617 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) [2022-03-15 16:13:57,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 16:13:57,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-15 16:13:57,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:57,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:13:57,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:58,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:58,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666335530] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:58,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:58,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 50 [2022-03-15 16:13:58,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226361715] [2022-03-15 16:13:58,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:58,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-15 16:13:58,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:58,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-15 16:13:58,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=2062, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:13:58,316 INFO L87 Difference]: Start difference. First operand 345 states and 735 transitions. Second operand has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 50 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:02,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:02,574 INFO L93 Difference]: Finished difference Result 2393 states and 4592 transitions. [2022-03-15 16:14:02,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-03-15 16:14:02,574 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 50 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-03-15 16:14:02,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:02,579 INFO L225 Difference]: With dead ends: 2393 [2022-03-15 16:14:02,579 INFO L226 Difference]: Without dead ends: 1820 [2022-03-15 16:14:02,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16669 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=11178, Invalid=34832, Unknown=0, NotChecked=0, Total=46010 [2022-03-15 16:14:02,582 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 744 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:02,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [744 Valid, 265 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1512 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:14:02,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2022-03-15 16:14:02,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 224. [2022-03-15 16:14:02,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.0403587443946187) internal successors, (455), 223 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) [2022-03-15 16:14:02,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 455 transitions. [2022-03-15 16:14:02,605 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 455 transitions. Word has length 48 [2022-03-15 16:14:02,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:02,605 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 455 transitions. [2022-03-15 16:14:02,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 50 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:02,605 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 455 transitions. [2022-03-15 16:14:02,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-15 16:14:02,605 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:02,605 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:02,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 16:14:02,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-15 16:14:02,814 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:14:02,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:02,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1759525095, now seen corresponding path program 24 times [2022-03-15 16:14:02,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:02,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782092927] [2022-03-15 16:14:02,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:02,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:02,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:02,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782092927] [2022-03-15 16:14:02,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782092927] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:02,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440034513] [2022-03-15 16:14:02,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:14:02,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:02,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:02,949 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) [2022-03-15 16:14:02,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 16:14:02,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-15 16:14:02,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:02,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:14:02,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:03,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:03,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440034513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:03,735 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:03,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 21] total 49 [2022-03-15 16:14:03,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835188617] [2022-03-15 16:14:03,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:03,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-15 16:14:03,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:03,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-15 16:14:03,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=1833, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:14:03,737 INFO L87 Difference]: Start difference. First operand 224 states and 455 transitions. Second operand has 50 states, 50 states have (on average 2.44) internal successors, (122), 49 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:06,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:06,409 INFO L93 Difference]: Finished difference Result 1241 states and 2457 transitions. [2022-03-15 16:14:06,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-03-15 16:14:06,409 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.44) internal successors, (122), 49 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-03-15 16:14:06,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:06,412 INFO L225 Difference]: With dead ends: 1241 [2022-03-15 16:14:06,412 INFO L226 Difference]: Without dead ends: 1237 [2022-03-15 16:14:06,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9856 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7546, Invalid=20846, Unknown=0, NotChecked=0, Total=28392 [2022-03-15 16:14:06,413 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 602 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:06,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 110 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:14:06,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2022-03-15 16:14:06,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 192. [2022-03-15 16:14:06,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.0523560209424083) internal successors, (392), 191 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:06,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 392 transitions. [2022-03-15 16:14:06,419 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 392 transitions. Word has length 48 [2022-03-15 16:14:06,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:06,419 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 392 transitions. [2022-03-15 16:14:06,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.44) internal successors, (122), 49 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:06,419 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 392 transitions. [2022-03-15 16:14:06,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-15 16:14:06,420 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:06,420 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:06,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-15 16:14:06,631 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,SelfDestructingSolverStorable26 [2022-03-15 16:14:06,632 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:14:06,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:06,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1192484695, now seen corresponding path program 25 times [2022-03-15 16:14:06,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:06,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601990576] [2022-03-15 16:14:06,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:06,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:06,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:06,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601990576] [2022-03-15 16:14:06,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601990576] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:06,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722330360] [2022-03-15 16:14:06,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:14:06,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:06,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:06,767 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) [2022-03-15 16:14:06,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 16:14:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:06,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 16:14:06,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:06,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:07,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722330360] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:07,066 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:07,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 12 [2022-03-15 16:14:07,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812774165] [2022-03-15 16:14:07,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:07,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 16:14:07,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:07,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 16:14:07,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-03-15 16:14:07,067 INFO L87 Difference]: Start difference. First operand 192 states and 392 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 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) [2022-03-15 16:14:07,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:07,259 INFO L93 Difference]: Finished difference Result 575 states and 1128 transitions. [2022-03-15 16:14:07,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:14:07,259 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 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 [2022-03-15 16:14:07,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:07,261 INFO L225 Difference]: With dead ends: 575 [2022-03-15 16:14:07,261 INFO L226 Difference]: Without dead ends: 506 [2022-03-15 16:14:07,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-03-15 16:14:07,261 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 83 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:07,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 738 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:14:07,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-03-15 16:14:07,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 385. [2022-03-15 16:14:07,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.140625) internal successors, (822), 384 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:07,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 822 transitions. [2022-03-15 16:14:07,266 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 822 transitions. Word has length 50 [2022-03-15 16:14:07,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:07,266 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 822 transitions. [2022-03-15 16:14:07,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 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) [2022-03-15 16:14:07,267 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 822 transitions. [2022-03-15 16:14:07,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-15 16:14:07,267 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:07,267 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:07,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-15 16:14:07,471 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,SelfDestructingSolverStorable27 [2022-03-15 16:14:07,471 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:14:07,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:07,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1208087211, now seen corresponding path program 26 times [2022-03-15 16:14:07,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:07,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100013509] [2022-03-15 16:14:07,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:07,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:07,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:07,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:07,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100013509] [2022-03-15 16:14:07,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100013509] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:07,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820099888] [2022-03-15 16:14:07,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:14:07,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:07,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:07,696 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) [2022-03-15 16:14:07,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 16:14:07,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:14:07,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:07,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:14:07,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:08,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:08,492 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:08,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820099888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:08,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:08,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 55 [2022-03-15 16:14:08,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355129795] [2022-03-15 16:14:08,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:08,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-15 16:14:08,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:08,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-15 16:14:08,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=2499, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 16:14:08,494 INFO L87 Difference]: Start difference. First operand 385 states and 822 transitions. Second operand has 56 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 55 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:14,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:14,138 INFO L93 Difference]: Finished difference Result 2869 states and 5504 transitions. [2022-03-15 16:14:14,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-03-15 16:14:14,139 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 55 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-03-15 16:14:14,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:14,144 INFO L225 Difference]: With dead ends: 2869 [2022-03-15 16:14:14,144 INFO L226 Difference]: Without dead ends: 2164 [2022-03-15 16:14:14,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24003 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=15464, Invalid=48292, Unknown=0, NotChecked=0, Total=63756 [2022-03-15 16:14:14,147 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 746 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 1868 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:14,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 325 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1868 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:14:14,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2022-03-15 16:14:14,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 246. [2022-03-15 16:14:14,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0448979591836736) internal successors, (501), 245 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:14,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 501 transitions. [2022-03-15 16:14:14,156 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 501 transitions. Word has length 52 [2022-03-15 16:14:14,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:14,156 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 501 transitions. [2022-03-15 16:14:14,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 55 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:14,156 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 501 transitions. [2022-03-15 16:14:14,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-15 16:14:14,157 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:14,157 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:14,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-15 16:14:14,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-15 16:14:14,371 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:14:14,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:14,372 INFO L85 PathProgramCache]: Analyzing trace with hash 742361319, now seen corresponding path program 27 times [2022-03-15 16:14:14,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:14,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658320242] [2022-03-15 16:14:14,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:14,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:14,533 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:14,534 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:14,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658320242] [2022-03-15 16:14:14,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658320242] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:14,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557519160] [2022-03-15 16:14:14,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:14:14,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:14,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:14,535 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) [2022-03-15 16:14:14,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 16:14:14,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-03-15 16:14:14,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:14,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:14:14,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:15,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:15,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557519160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:15,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:15,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23, 23] total 54 [2022-03-15 16:14:15,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971266206] [2022-03-15 16:14:15,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:15,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-15 16:14:15,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:15,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-15 16:14:15,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=740, Invalid=2230, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:14:15,456 INFO L87 Difference]: Start difference. First operand 246 states and 501 transitions. Second operand has 55 states, 55 states have (on average 2.4363636363636365) internal successors, (134), 54 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:18,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:18,796 INFO L93 Difference]: Finished difference Result 1485 states and 2945 transitions. [2022-03-15 16:14:18,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-03-15 16:14:18,797 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.4363636363636365) internal successors, (134), 54 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-03-15 16:14:18,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:18,800 INFO L225 Difference]: With dead ends: 1485 [2022-03-15 16:14:18,800 INFO L226 Difference]: Without dead ends: 1481 [2022-03-15 16:14:18,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13889 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=10199, Invalid=28413, Unknown=0, NotChecked=0, Total=38612 [2022-03-15 16:14:18,803 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 690 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:18,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 121 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:14:18,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2022-03-15 16:14:18,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 210. [2022-03-15 16:14:18,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.0574162679425836) internal successors, (430), 209 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:18,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 430 transitions. [2022-03-15 16:14:18,809 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 430 transitions. Word has length 52 [2022-03-15 16:14:18,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:18,809 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 430 transitions. [2022-03-15 16:14:18,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.4363636363636365) internal successors, (134), 54 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:18,809 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 430 transitions. [2022-03-15 16:14:18,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-15 16:14:18,810 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:18,810 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:18,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-15 16:14:19,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:19,023 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:14:19,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:19,024 INFO L85 PathProgramCache]: Analyzing trace with hash 2041102099, now seen corresponding path program 28 times [2022-03-15 16:14:19,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:19,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605742843] [2022-03-15 16:14:19,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:19,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:19,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:19,154 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:19,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605742843] [2022-03-15 16:14:19,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605742843] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:19,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631407731] [2022-03-15 16:14:19,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:14:19,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:19,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:19,155 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) [2022-03-15 16:14:19,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 16:14:19,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:14:19,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:19,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-15 16:14:19,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:19,362 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:19,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:19,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631407731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:19,502 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:19,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2022-03-15 16:14:19,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612424720] [2022-03-15 16:14:19,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:19,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:14:19,502 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:19,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:14:19,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:14:19,503 INFO L87 Difference]: Start difference. First operand 210 states and 430 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 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) [2022-03-15 16:14:19,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:19,713 INFO L93 Difference]: Finished difference Result 634 states and 1245 transitions. [2022-03-15 16:14:19,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 16:14:19,713 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 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 54 [2022-03-15 16:14:19,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:19,715 INFO L225 Difference]: With dead ends: 634 [2022-03-15 16:14:19,715 INFO L226 Difference]: Without dead ends: 559 [2022-03-15 16:14:19,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:14:19,715 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 92 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:19,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 888 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:14:19,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-03-15 16:14:19,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 425. [2022-03-15 16:14:19,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.143867924528302) internal successors, (909), 424 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:19,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 909 transitions. [2022-03-15 16:14:19,720 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 909 transitions. Word has length 54 [2022-03-15 16:14:19,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:19,720 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 909 transitions. [2022-03-15 16:14:19,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 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) [2022-03-15 16:14:19,721 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 909 transitions. [2022-03-15 16:14:19,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-15 16:14:19,721 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:19,721 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:19,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-15 16:14:19,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:19,947 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:14:19,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:19,948 INFO L85 PathProgramCache]: Analyzing trace with hash -307249647, now seen corresponding path program 29 times [2022-03-15 16:14:19,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:19,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801789017] [2022-03-15 16:14:19,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:19,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:20,208 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:20,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801789017] [2022-03-15 16:14:20,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801789017] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:20,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151440583] [2022-03-15 16:14:20,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:14:20,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:20,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:20,210 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) [2022-03-15 16:14:20,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 16:14:20,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-15 16:14:20,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:20,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:14:20,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:20,777 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:20,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:21,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151440583] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:21,092 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:21,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 60 [2022-03-15 16:14:21,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233123629] [2022-03-15 16:14:21,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:21,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-15 16:14:21,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:21,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-15 16:14:21,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=682, Invalid=2978, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:14:21,093 INFO L87 Difference]: Start difference. First operand 425 states and 909 transitions. Second operand has 61 states, 61 states have (on average 2.1475409836065573) internal successors, (131), 60 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:28,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:28,119 INFO L93 Difference]: Finished difference Result 3385 states and 6492 transitions. [2022-03-15 16:14:28,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2022-03-15 16:14:28,119 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1475409836065573) internal successors, (131), 60 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-03-15 16:14:28,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:28,125 INFO L225 Difference]: With dead ends: 3385 [2022-03-15 16:14:28,126 INFO L226 Difference]: Without dead ends: 2536 [2022-03-15 16:14:28,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33575 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=20880, Invalid=65262, Unknown=0, NotChecked=0, Total=86142 [2022-03-15 16:14:28,129 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 861 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 2186 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 2372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 2186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:28,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 341 Invalid, 2372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 2186 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 16:14:28,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2536 states. [2022-03-15 16:14:28,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2536 to 268. [2022-03-15 16:14:28,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.048689138576779) internal successors, (547), 267 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:28,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 547 transitions. [2022-03-15 16:14:28,140 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 547 transitions. Word has length 56 [2022-03-15 16:14:28,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:28,140 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 547 transitions. [2022-03-15 16:14:28,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.1475409836065573) internal successors, (131), 60 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:28,140 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 547 transitions. [2022-03-15 16:14:28,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-15 16:14:28,140 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:28,141 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:28,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-15 16:14:28,356 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,SelfDestructingSolverStorable31 [2022-03-15 16:14:28,356 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:14:28,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:28,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1742231065, now seen corresponding path program 30 times [2022-03-15 16:14:28,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:28,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288055194] [2022-03-15 16:14:28,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:28,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:28,527 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:28,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288055194] [2022-03-15 16:14:28,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288055194] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:28,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774344777] [2022-03-15 16:14:28,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:14:28,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:28,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:28,529 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) [2022-03-15 16:14:28,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 16:14:28,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-03-15 16:14:28,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:28,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:14:28,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:29,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:29,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774344777] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:29,612 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:29,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25, 25] total 59 [2022-03-15 16:14:29,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957530034] [2022-03-15 16:14:29,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:29,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-15 16:14:29,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:29,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-15 16:14:29,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=874, Invalid=2666, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 16:14:29,613 INFO L87 Difference]: Start difference. First operand 268 states and 547 transitions. Second operand has 60 states, 60 states have (on average 2.433333333333333) internal successors, (146), 59 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:33,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:33,743 INFO L93 Difference]: Finished difference Result 1751 states and 3477 transitions. [2022-03-15 16:14:33,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-03-15 16:14:33,743 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.433333333333333) internal successors, (146), 59 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-03-15 16:14:33,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:33,747 INFO L225 Difference]: With dead ends: 1751 [2022-03-15 16:14:33,747 INFO L226 Difference]: Without dead ends: 1747 [2022-03-15 16:14:33,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19059 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=13483, Invalid=37819, Unknown=0, NotChecked=0, Total=51302 [2022-03-15 16:14:33,781 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 764 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:33,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 121 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1146 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:14:33,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2022-03-15 16:14:33,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 228. [2022-03-15 16:14:33,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.0616740088105727) internal successors, (468), 227 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:33,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 468 transitions. [2022-03-15 16:14:33,788 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 468 transitions. Word has length 56 [2022-03-15 16:14:33,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:33,788 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 468 transitions. [2022-03-15 16:14:33,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.433333333333333) internal successors, (146), 59 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:33,789 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 468 transitions. [2022-03-15 16:14:33,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-15 16:14:33,789 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:33,789 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:33,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-15 16:14:33,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:33,990 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:14:33,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:33,990 INFO L85 PathProgramCache]: Analyzing trace with hash 162607311, now seen corresponding path program 31 times [2022-03-15 16:14:33,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:33,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706930518] [2022-03-15 16:14:33,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:33,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:34,135 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:34,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706930518] [2022-03-15 16:14:34,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706930518] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:34,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231152821] [2022-03-15 16:14:34,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:14:34,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:34,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:34,137 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) [2022-03-15 16:14:34,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 16:14:34,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:34,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 16:14:34,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:34,365 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:34,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:34,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231152821] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:34,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:34,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 14 [2022-03-15 16:14:34,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236031891] [2022-03-15 16:14:34,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:34,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:14:34,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:34,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:14:34,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:14:34,523 INFO L87 Difference]: Start difference. First operand 228 states and 468 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) 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) [2022-03-15 16:14:34,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:34,771 INFO L93 Difference]: Finished difference Result 693 states and 1362 transitions. [2022-03-15 16:14:34,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 16:14:34,771 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) 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 58 [2022-03-15 16:14:34,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:34,773 INFO L225 Difference]: With dead ends: 693 [2022-03-15 16:14:34,773 INFO L226 Difference]: Without dead ends: 612 [2022-03-15 16:14:34,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:14:34,773 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 101 mSDsluCounter, 1372 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:34,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 1052 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:14:34,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-03-15 16:14:34,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 465. [2022-03-15 16:14:34,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.146551724137931) internal successors, (996), 464 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:34,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 996 transitions. [2022-03-15 16:14:34,779 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 996 transitions. Word has length 58 [2022-03-15 16:14:34,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:34,779 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 996 transitions. [2022-03-15 16:14:34,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) 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) [2022-03-15 16:14:34,779 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 996 transitions. [2022-03-15 16:14:34,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-15 16:14:34,779 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:34,780 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:34,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-15 16:14:34,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:34,995 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:14:34,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:34,995 INFO L85 PathProgramCache]: Analyzing trace with hash 335839437, now seen corresponding path program 32 times [2022-03-15 16:14:34,995 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:34,995 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258654390] [2022-03-15 16:14:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:34,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:35,320 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:35,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258654390] [2022-03-15 16:14:35,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258654390] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:35,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011610458] [2022-03-15 16:14:35,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:14:35,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:35,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:35,321 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) [2022-03-15 16:14:35,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 16:14:35,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:14:35,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:35,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:14:35,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:35,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:36,333 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:36,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011610458] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:36,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:36,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 65 [2022-03-15 16:14:36,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224025659] [2022-03-15 16:14:36,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:36,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-15 16:14:36,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:36,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-15 16:14:36,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=3499, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 16:14:36,335 INFO L87 Difference]: Start difference. First operand 465 states and 996 transitions. Second operand has 66 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:45,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:45,330 INFO L93 Difference]: Finished difference Result 3941 states and 7556 transitions. [2022-03-15 16:14:45,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2022-03-15 16:14:45,331 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-03-15 16:14:45,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:45,335 INFO L225 Difference]: With dead ends: 3941 [2022-03-15 16:14:45,335 INFO L226 Difference]: Without dead ends: 2936 [2022-03-15 16:14:45,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45804 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=27610, Invalid=86296, Unknown=0, NotChecked=0, Total=113906 [2022-03-15 16:14:45,338 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1146 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 2778 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 3029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 2778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:45,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1146 Valid, 437 Invalid, 3029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 2778 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-15 16:14:45,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2936 states. [2022-03-15 16:14:45,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2936 to 290. [2022-03-15 16:14:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.0519031141868513) internal successors, (593), 289 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) [2022-03-15 16:14:45,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 593 transitions. [2022-03-15 16:14:45,349 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 593 transitions. Word has length 60 [2022-03-15 16:14:45,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:45,350 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 593 transitions. [2022-03-15 16:14:45,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:45,350 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 593 transitions. [2022-03-15 16:14:45,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-15 16:14:45,350 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:45,350 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:45,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-15 16:14:45,565 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,SelfDestructingSolverStorable34 [2022-03-15 16:14:45,566 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:14:45,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:45,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1087888359, now seen corresponding path program 33 times [2022-03-15 16:14:45,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:45,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752622158] [2022-03-15 16:14:45,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:45,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:45,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:45,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:45,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752622158] [2022-03-15 16:14:45,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752622158] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:45,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18722158] [2022-03-15 16:14:45,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:14:45,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:45,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:45,756 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) [2022-03-15 16:14:45,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 16:14:45,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-03-15 16:14:45,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:45,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:14:45,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:46,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:46,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18722158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:46,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:46,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27, 27] total 64 [2022-03-15 16:14:46,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918934474] [2022-03-15 16:14:46,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:46,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-15 16:14:46,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:46,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-15 16:14:46,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1019, Invalid=3141, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 16:14:46,948 INFO L87 Difference]: Start difference. First operand 290 states and 593 transitions. Second operand has 65 states, 65 states have (on average 2.4307692307692306) internal successors, (158), 64 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:52,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:52,168 INFO L93 Difference]: Finished difference Result 2039 states and 4053 transitions. [2022-03-15 16:14:52,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-03-15 16:14:52,168 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.4307692307692306) internal successors, (158), 64 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-03-15 16:14:52,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:52,171 INFO L225 Difference]: With dead ends: 2039 [2022-03-15 16:14:52,171 INFO L226 Difference]: Without dead ends: 2035 [2022-03-15 16:14:52,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25565 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=17489, Invalid=49333, Unknown=0, NotChecked=0, Total=66822 [2022-03-15 16:14:52,174 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 683 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:52,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [683 Valid, 166 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:14:52,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2022-03-15 16:14:52,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 246. [2022-03-15 16:14:52,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0653061224489795) internal successors, (506), 245 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:52,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 506 transitions. [2022-03-15 16:14:52,183 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 506 transitions. Word has length 60 [2022-03-15 16:14:52,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:52,183 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 506 transitions. [2022-03-15 16:14:52,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.4307692307692306) internal successors, (158), 64 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:52,183 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 506 transitions. [2022-03-15 16:14:52,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-15 16:14:52,184 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:52,184 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:52,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-15 16:14:52,392 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,SelfDestructingSolverStorable35 [2022-03-15 16:14:52,393 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:14:52,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:52,393 INFO L85 PathProgramCache]: Analyzing trace with hash -304073589, now seen corresponding path program 34 times [2022-03-15 16:14:52,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:52,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753587947] [2022-03-15 16:14:52,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:52,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:52,550 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:52,551 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:52,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753587947] [2022-03-15 16:14:52,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753587947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:52,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056644996] [2022-03-15 16:14:52,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:14:52,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:52,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:52,552 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) [2022-03-15 16:14:52,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 16:14:52,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:14:52,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:52,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:14:52,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:52,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:52,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056644996] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:52,906 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:52,906 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 15 [2022-03-15 16:14:52,906 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802967083] [2022-03-15 16:14:52,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:52,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:14:52,906 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:52,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:14:52,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:14:52,907 INFO L87 Difference]: Start difference. First operand 246 states and 506 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) 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) [2022-03-15 16:14:53,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:53,198 INFO L93 Difference]: Finished difference Result 752 states and 1479 transitions. [2022-03-15 16:14:53,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 16:14:53,198 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) 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 62 [2022-03-15 16:14:53,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:53,199 INFO L225 Difference]: With dead ends: 752 [2022-03-15 16:14:53,199 INFO L226 Difference]: Without dead ends: 665 [2022-03-15 16:14:53,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:14:53,200 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 110 mSDsluCounter, 1616 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:53,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1230 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:14:53,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-03-15 16:14:53,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 505. [2022-03-15 16:14:53,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1488095238095237) internal successors, (1083), 504 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:53,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1083 transitions. [2022-03-15 16:14:53,207 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1083 transitions. Word has length 62 [2022-03-15 16:14:53,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:53,207 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 1083 transitions. [2022-03-15 16:14:53,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) 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) [2022-03-15 16:14:53,207 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1083 transitions. [2022-03-15 16:14:53,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-15 16:14:53,207 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:53,208 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:53,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-15 16:14:53,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-15 16:14:53,423 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:14:53,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:53,423 INFO L85 PathProgramCache]: Analyzing trace with hash -34646647, now seen corresponding path program 35 times [2022-03-15 16:14:53,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:53,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244434784] [2022-03-15 16:14:53,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:53,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:53,751 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:53,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244434784] [2022-03-15 16:14:53,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244434784] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:53,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797005950] [2022-03-15 16:14:53,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:14:53,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:53,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:53,753 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) [2022-03-15 16:14:53,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 16:14:53,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-03-15 16:14:53,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:53,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:14:53,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:54,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:54,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797005950] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:54,965 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:54,965 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 70 [2022-03-15 16:14:54,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282765376] [2022-03-15 16:14:54,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:54,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-15 16:14:54,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:54,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-15 16:14:54,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=4062, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 16:14:54,967 INFO L87 Difference]: Start difference. First operand 505 states and 1083 transitions. Second operand has 71 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 70 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:05,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:05,925 INFO L93 Difference]: Finished difference Result 4537 states and 8696 transitions. [2022-03-15 16:15:05,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 318 states. [2022-03-15 16:15:05,925 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 70 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-03-15 16:15:05,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:05,930 INFO L225 Difference]: With dead ends: 4537 [2022-03-15 16:15:05,930 INFO L226 Difference]: Without dead ends: 3364 [2022-03-15 16:15:05,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61155 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=35852, Invalid=111988, Unknown=0, NotChecked=0, Total=147840 [2022-03-15 16:15:05,936 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 945 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 3111 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 3315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 3111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:05,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [945 Valid, 465 Invalid, 3315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 3111 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-15 16:15:05,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2022-03-15 16:15:05,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 312. [2022-03-15 16:15:05,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.054662379421222) internal successors, (639), 311 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 639 transitions. [2022-03-15 16:15:05,953 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 639 transitions. Word has length 64 [2022-03-15 16:15:05,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:05,953 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 639 transitions. [2022-03-15 16:15:05,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 70 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:05,953 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 639 transitions. [2022-03-15 16:15:05,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-15 16:15:05,954 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:05,954 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:05,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-15 16:15:06,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:06,169 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:15:06,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:06,170 INFO L85 PathProgramCache]: Analyzing trace with hash -2080416025, now seen corresponding path program 36 times [2022-03-15 16:15:06,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:06,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622868688] [2022-03-15 16:15:06,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:06,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:06,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:06,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622868688] [2022-03-15 16:15:06,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622868688] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:06,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847962896] [2022-03-15 16:15:06,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:15:06,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:06,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:06,366 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) [2022-03-15 16:15:06,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 16:15:06,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-15 16:15:06,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:06,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:15:06,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:07,087 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:07,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:07,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847962896] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:07,690 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:07,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29, 29] total 69 [2022-03-15 16:15:07,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875927747] [2022-03-15 16:15:07,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:07,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-15 16:15:07,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:07,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-15 16:15:07,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1175, Invalid=3655, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 16:15:07,692 INFO L87 Difference]: Start difference. First operand 312 states and 639 transitions. Second operand has 70 states, 70 states have (on average 2.4285714285714284) internal successors, (170), 69 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:14,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:14,138 INFO L93 Difference]: Finished difference Result 2349 states and 4673 transitions. [2022-03-15 16:15:14,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2022-03-15 16:15:14,139 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.4285714285714284) internal successors, (170), 69 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-03-15 16:15:14,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:14,142 INFO L225 Difference]: With dead ends: 2349 [2022-03-15 16:15:14,142 INFO L226 Difference]: Without dead ends: 2345 [2022-03-15 16:15:14,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33623 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=22314, Invalid=63242, Unknown=0, NotChecked=0, Total=85556 [2022-03-15 16:15:14,147 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 943 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:14,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [943 Valid, 153 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1528 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:15:14,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2022-03-15 16:15:14,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 264. [2022-03-15 16:15:14,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.068441064638783) internal successors, (544), 263 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:14,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 544 transitions. [2022-03-15 16:15:14,157 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 544 transitions. Word has length 64 [2022-03-15 16:15:14,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:14,157 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 544 transitions. [2022-03-15 16:15:14,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.4285714285714284) internal successors, (170), 69 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:14,157 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 544 transitions. [2022-03-15 16:15:14,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-15 16:15:14,158 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:14,158 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:14,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-15 16:15:14,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-15 16:15:14,371 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:15:14,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:14,372 INFO L85 PathProgramCache]: Analyzing trace with hash 141085255, now seen corresponding path program 37 times [2022-03-15 16:15:14,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:14,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509777867] [2022-03-15 16:15:14,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:14,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:14,539 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:14,539 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:14,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509777867] [2022-03-15 16:15:14,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509777867] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:14,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575090552] [2022-03-15 16:15:14,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:15:14,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:14,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:14,540 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) [2022-03-15 16:15:14,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 16:15:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:14,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-15 16:15:14,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:14,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:14,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575090552] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:14,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:14,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 16 [2022-03-15 16:15:14,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64559469] [2022-03-15 16:15:14,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:14,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:15:14,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:14,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:15:14,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:15:14,922 INFO L87 Difference]: Start difference. First operand 264 states and 544 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:15,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:15,281 INFO L93 Difference]: Finished difference Result 811 states and 1596 transitions. [2022-03-15 16:15:15,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:15:15,281 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-03-15 16:15:15,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:15,287 INFO L225 Difference]: With dead ends: 811 [2022-03-15 16:15:15,287 INFO L226 Difference]: Without dead ends: 718 [2022-03-15 16:15:15,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 142 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:15:15,288 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 119 mSDsluCounter, 1880 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:15,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 1422 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:15:15,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-03-15 16:15:15,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 545. [2022-03-15 16:15:15,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 2.150735294117647) internal successors, (1170), 544 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:15,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1170 transitions. [2022-03-15 16:15:15,294 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1170 transitions. Word has length 66 [2022-03-15 16:15:15,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:15,294 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 1170 transitions. [2022-03-15 16:15:15,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:15,294 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1170 transitions. [2022-03-15 16:15:15,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-15 16:15:15,295 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:15,295 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:15,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-15 16:15:15,511 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,SelfDestructingSolverStorable39 [2022-03-15 16:15:15,511 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:15:15,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:15,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1239628869, now seen corresponding path program 38 times [2022-03-15 16:15:15,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:15,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543750680] [2022-03-15 16:15:15,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:15,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:15,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:15,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543750680] [2022-03-15 16:15:15,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543750680] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:15,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265239421] [2022-03-15 16:15:15,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:15:15,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:15,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:15,988 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) [2022-03-15 16:15:16,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 16:15:16,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:15:16,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:16,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:15:16,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:16,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:17,266 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:17,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265239421] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:17,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:17,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 75 [2022-03-15 16:15:17,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115853631] [2022-03-15 16:15:17,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:17,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-15 16:15:17,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:17,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-15 16:15:17,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1033, Invalid=4667, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 16:15:17,269 INFO L87 Difference]: Start difference. First operand 545 states and 1170 transitions. Second operand has 76 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 75 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:31,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:31,291 INFO L93 Difference]: Finished difference Result 5173 states and 9912 transitions. [2022-03-15 16:15:31,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 363 states. [2022-03-15 16:15:31,291 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 75 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-03-15 16:15:31,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:31,296 INFO L225 Difference]: With dead ends: 5173 [2022-03-15 16:15:31,297 INFO L226 Difference]: Without dead ends: 3820 [2022-03-15 16:15:31,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 433 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80122 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=45818, Invalid=142972, Unknown=0, NotChecked=0, Total=188790 [2022-03-15 16:15:31,303 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1177 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 3172 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 3431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 3172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:31,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1177 Valid, 530 Invalid, 3431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 3172 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-15 16:15:31,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3820 states. [2022-03-15 16:15:31,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3820 to 334. [2022-03-15 16:15:31,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.057057057057057) internal successors, (685), 333 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:31,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 685 transitions. [2022-03-15 16:15:31,318 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 685 transitions. Word has length 68 [2022-03-15 16:15:31,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:31,319 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 685 transitions. [2022-03-15 16:15:31,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 75 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:31,319 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 685 transitions. [2022-03-15 16:15:31,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-15 16:15:31,319 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:31,319 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:31,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-15 16:15:31,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:31,536 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:15:31,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:31,536 INFO L85 PathProgramCache]: Analyzing trace with hash -859999513, now seen corresponding path program 39 times [2022-03-15 16:15:31,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:31,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089332358] [2022-03-15 16:15:31,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:31,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:31,767 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:31,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:31,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089332358] [2022-03-15 16:15:31,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089332358] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:31,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881900609] [2022-03-15 16:15:31,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:15:31,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:31,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:31,768 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) [2022-03-15 16:15:31,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 16:15:31,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-03-15 16:15:31,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:31,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:15:31,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:32,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:33,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881900609] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:33,300 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:33,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31, 31] total 74 [2022-03-15 16:15:33,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858538185] [2022-03-15 16:15:33,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:33,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-15 16:15:33,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:33,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-15 16:15:33,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1342, Invalid=4208, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 16:15:33,302 INFO L87 Difference]: Start difference. First operand 334 states and 685 transitions. Second operand has 75 states, 75 states have (on average 2.4266666666666667) internal successors, (182), 74 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) [2022-03-15 16:15:41,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:41,050 INFO L93 Difference]: Finished difference Result 2681 states and 5337 transitions. [2022-03-15 16:15:41,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2022-03-15 16:15:41,050 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.4266666666666667) internal successors, (182), 74 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) Word has length 68 [2022-03-15 16:15:41,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:41,054 INFO L225 Difference]: With dead ends: 2681 [2022-03-15 16:15:41,054 INFO L226 Difference]: Without dead ends: 2677 [2022-03-15 16:15:41,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43465 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=28061, Invalid=79851, Unknown=0, NotChecked=0, Total=107912 [2022-03-15 16:15:41,060 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 864 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 1831 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 2097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:41,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [864 Valid, 194 Invalid, 2097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1831 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 16:15:41,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2022-03-15 16:15:41,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 282. [2022-03-15 16:15:41,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.0711743772241995) internal successors, (582), 281 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:41,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 582 transitions. [2022-03-15 16:15:41,073 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 582 transitions. Word has length 68 [2022-03-15 16:15:41,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:41,073 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 582 transitions. [2022-03-15 16:15:41,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.4266666666666667) internal successors, (182), 74 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) [2022-03-15 16:15:41,073 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 582 transitions. [2022-03-15 16:15:41,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-15 16:15:41,074 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:41,074 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:41,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-15 16:15:41,274 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,SelfDestructingSolverStorable41 [2022-03-15 16:15:41,274 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:15:41,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:41,275 INFO L85 PathProgramCache]: Analyzing trace with hash 654176771, now seen corresponding path program 40 times [2022-03-15 16:15:41,275 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:41,275 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957208373] [2022-03-15 16:15:41,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:41,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:41,518 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:41,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957208373] [2022-03-15 16:15:41,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957208373] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:41,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653861115] [2022-03-15 16:15:41,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:15:41,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:41,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:41,520 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) [2022-03-15 16:15:41,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 16:15:41,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:15:41,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:41,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 16:15:41,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:41,764 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:41,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:41,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653861115] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:41,968 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:41,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 17 [2022-03-15 16:15:41,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876938286] [2022-03-15 16:15:41,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:41,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:15:41,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:41,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:15:41,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:15:41,968 INFO L87 Difference]: Start difference. First operand 282 states and 582 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 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) [2022-03-15 16:15:42,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:42,371 INFO L93 Difference]: Finished difference Result 870 states and 1713 transitions. [2022-03-15 16:15:42,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:15:42,373 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 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 70 [2022-03-15 16:15:42,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:42,375 INFO L225 Difference]: With dead ends: 870 [2022-03-15 16:15:42,375 INFO L226 Difference]: Without dead ends: 771 [2022-03-15 16:15:42,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:15:42,375 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 128 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:42,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 1628 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:15:42,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-03-15 16:15:42,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 585. [2022-03-15 16:15:42,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.1523972602739727) internal successors, (1257), 584 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:42,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1257 transitions. [2022-03-15 16:15:42,382 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1257 transitions. Word has length 70 [2022-03-15 16:15:42,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:42,382 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 1257 transitions. [2022-03-15 16:15:42,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 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) [2022-03-15 16:15:42,382 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1257 transitions. [2022-03-15 16:15:42,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-15 16:15:42,383 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:42,383 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:42,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-15 16:15:42,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:42,599 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:15:42,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:42,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1641231617, now seen corresponding path program 41 times [2022-03-15 16:15:42,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:42,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155916615] [2022-03-15 16:15:42,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:42,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:43,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:43,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155916615] [2022-03-15 16:15:43,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155916615] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:43,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175017426] [2022-03-15 16:15:43,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:15:43,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:43,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:43,052 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) [2022-03-15 16:15:43,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 16:15:43,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-03-15 16:15:43,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:43,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:15:43,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:43,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:44,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175017426] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:44,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:44,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 80 [2022-03-15 16:15:44,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218462187] [2022-03-15 16:15:44,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:44,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-15 16:15:44,417 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:44,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-15 16:15:44,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1166, Invalid=5314, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 16:15:44,419 INFO L87 Difference]: Start difference. First operand 585 states and 1257 transitions. Second operand has 81 states, 81 states have (on average 2.111111111111111) internal successors, (171), 80 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:00,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:00,832 INFO L93 Difference]: Finished difference Result 5849 states and 11204 transitions. [2022-03-15 16:16:00,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 411 states. [2022-03-15 16:16:00,832 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.111111111111111) internal successors, (171), 80 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-03-15 16:16:00,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:00,837 INFO L225 Difference]: With dead ends: 5849 [2022-03-15 16:16:00,837 INFO L226 Difference]: Without dead ends: 4304 [2022-03-15 16:16:00,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 486 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103245 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=57734, Invalid=179922, Unknown=0, NotChecked=0, Total=237656 [2022-03-15 16:16:00,845 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1314 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 3750 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1314 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 4043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 3750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:00,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1314 Valid, 578 Invalid, 4043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 3750 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-15 16:16:00,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4304 states. [2022-03-15 16:16:00,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4304 to 356. [2022-03-15 16:16:00,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.0591549295774647) internal successors, (731), 355 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:00,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 731 transitions. [2022-03-15 16:16:00,863 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 731 transitions. Word has length 72 [2022-03-15 16:16:00,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:00,864 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 731 transitions. [2022-03-15 16:16:00,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.111111111111111) internal successors, (171), 80 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:00,864 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 731 transitions. [2022-03-15 16:16:00,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-15 16:16:00,864 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:00,864 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:16:00,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-15 16:16:01,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:01,071 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:16:01,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:01,072 INFO L85 PathProgramCache]: Analyzing trace with hash -677292057, now seen corresponding path program 42 times [2022-03-15 16:16:01,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:01,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077622680] [2022-03-15 16:16:01,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:01,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:01,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:01,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077622680] [2022-03-15 16:16:01,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077622680] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:01,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629805939] [2022-03-15 16:16:01,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:16:01,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:01,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:01,307 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) [2022-03-15 16:16:01,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 16:16:01,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-03-15 16:16:01,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:01,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:16:01,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:02,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:02,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629805939] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:02,945 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:02,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33, 33] total 79 [2022-03-15 16:16:02,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141512455] [2022-03-15 16:16:02,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:02,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-15 16:16:02,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:02,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-15 16:16:02,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1520, Invalid=4800, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 16:16:02,946 INFO L87 Difference]: Start difference. First operand 356 states and 731 transitions. Second operand has 80 states, 80 states have (on average 2.425) internal successors, (194), 79 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:12,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:12,136 INFO L93 Difference]: Finished difference Result 3035 states and 6045 transitions. [2022-03-15 16:16:12,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 291 states. [2022-03-15 16:16:12,136 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.425) internal successors, (194), 79 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-03-15 16:16:12,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:12,139 INFO L225 Difference]: With dead ends: 3035 [2022-03-15 16:16:12,139 INFO L226 Difference]: Without dead ends: 3031 [2022-03-15 16:16:12,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 365 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55340 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=34839, Invalid=99483, Unknown=0, NotChecked=0, Total=134322 [2022-03-15 16:16:12,144 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 697 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 2303 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 2487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 2303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:12,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 215 Invalid, 2487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 2303 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-15 16:16:12,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2022-03-15 16:16:12,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 300. [2022-03-15 16:16:12,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.0735785953177257) internal successors, (620), 299 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:12,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 620 transitions. [2022-03-15 16:16:12,157 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 620 transitions. Word has length 72 [2022-03-15 16:16:12,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:12,157 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 620 transitions. [2022-03-15 16:16:12,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.425) internal successors, (194), 79 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:12,157 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 620 transitions. [2022-03-15 16:16:12,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-15 16:16:12,157 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:12,157 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:16:12,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-15 16:16:12,361 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,SelfDestructingSolverStorable44 [2022-03-15 16:16:12,361 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:16:12,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:12,362 INFO L85 PathProgramCache]: Analyzing trace with hash 47360959, now seen corresponding path program 43 times [2022-03-15 16:16:12,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:12,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402192556] [2022-03-15 16:16:12,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:12,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:12,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:12,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402192556] [2022-03-15 16:16:12,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402192556] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:12,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409736836] [2022-03-15 16:16:12,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:16:12,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:12,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:12,556 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) [2022-03-15 16:16:12,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 16:16:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:12,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-15 16:16:12,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:12,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:13,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409736836] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:13,007 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:13,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 18 [2022-03-15 16:16:13,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321439842] [2022-03-15 16:16:13,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:13,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 16:16:13,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:13,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 16:16:13,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-03-15 16:16:13,008 INFO L87 Difference]: Start difference. First operand 300 states and 620 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:13,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:13,445 INFO L93 Difference]: Finished difference Result 929 states and 1830 transitions. [2022-03-15 16:16:13,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:16:13,445 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-03-15 16:16:13,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:13,446 INFO L225 Difference]: With dead ends: 929 [2022-03-15 16:16:13,446 INFO L226 Difference]: Without dead ends: 824 [2022-03-15 16:16:13,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-03-15 16:16:13,447 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 137 mSDsluCounter, 2468 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1848 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:13,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 1848 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:16:13,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-03-15 16:16:13,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 625. [2022-03-15 16:16:13,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.1538461538461537) internal successors, (1344), 624 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:13,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1344 transitions. [2022-03-15 16:16:13,454 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1344 transitions. Word has length 74 [2022-03-15 16:16:13,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:13,454 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1344 transitions. [2022-03-15 16:16:13,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:13,454 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1344 transitions. [2022-03-15 16:16:13,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-15 16:16:13,455 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:13,455 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:16:13,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-15 16:16:13,677 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,SelfDestructingSolverStorable45 [2022-03-15 16:16:13,678 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:16:13,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:13,678 INFO L85 PathProgramCache]: Analyzing trace with hash 2066890685, now seen corresponding path program 44 times [2022-03-15 16:16:13,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:13,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349316115] [2022-03-15 16:16:13,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:13,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:14,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:14,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349316115] [2022-03-15 16:16:14,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349316115] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:14,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988167217] [2022-03-15 16:16:14,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:16:14,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:14,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:14,129 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) [2022-03-15 16:16:14,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 16:16:14,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:16:14,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:14,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:16:14,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:15,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:15,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988167217] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:15,611 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:15,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 85 [2022-03-15 16:16:15,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821285842] [2022-03-15 16:16:15,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:15,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-15 16:16:15,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:15,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-15 16:16:15,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1307, Invalid=6003, Unknown=0, NotChecked=0, Total=7310 [2022-03-15 16:16:15,613 INFO L87 Difference]: Start difference. First operand 625 states and 1344 transitions. Second operand has 86 states, 86 states have (on average 2.104651162790698) internal successors, (181), 85 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:35,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:35,289 INFO L93 Difference]: Finished difference Result 6565 states and 12572 transitions. [2022-03-15 16:16:35,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 462 states. [2022-03-15 16:16:35,290 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.104651162790698) internal successors, (181), 85 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-03-15 16:16:35,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:35,295 INFO L225 Difference]: With dead ends: 6565 [2022-03-15 16:16:35,295 INFO L226 Difference]: Without dead ends: 4816 [2022-03-15 16:16:35,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 542 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131093 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=71840, Invalid=223552, Unknown=0, NotChecked=0, Total=295392 [2022-03-15 16:16:35,306 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1419 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 4278 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1419 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 4576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 4278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:35,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1419 Valid, 614 Invalid, 4576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 4278 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-15 16:16:35,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4816 states. [2022-03-15 16:16:35,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4816 to 378. [2022-03-15 16:16:35,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.061007957559682) internal successors, (777), 377 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:35,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 777 transitions. [2022-03-15 16:16:35,322 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 777 transitions. Word has length 76 [2022-03-15 16:16:35,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:35,322 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 777 transitions. [2022-03-15 16:16:35,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.104651162790698) internal successors, (181), 85 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:35,323 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 777 transitions. [2022-03-15 16:16:35,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-15 16:16:35,323 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:35,323 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:16:35,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-15 16:16:35,538 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,SelfDestructingSolverStorable46 [2022-03-15 16:16:35,539 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:16:35,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:35,539 INFO L85 PathProgramCache]: Analyzing trace with hash -156611097, now seen corresponding path program 45 times [2022-03-15 16:16:35,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:35,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106830171] [2022-03-15 16:16:35,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:35,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:35,831 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:35,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:35,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106830171] [2022-03-15 16:16:35,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106830171] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:35,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868797629] [2022-03-15 16:16:35,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:16:35,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:35,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:35,832 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) [2022-03-15 16:16:35,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 16:16:35,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-03-15 16:16:35,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:35,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:16:35,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:36,797 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:36,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:37,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868797629] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:37,626 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:37,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35, 35] total 84 [2022-03-15 16:16:37,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175468642] [2022-03-15 16:16:37,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:37,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-15 16:16:37,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:37,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-15 16:16:37,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1709, Invalid=5431, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 16:16:37,628 INFO L87 Difference]: Start difference. First operand 378 states and 777 transitions. Second operand has 85 states, 85 states have (on average 2.4235294117647057) internal successors, (206), 84 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:48,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:48,688 INFO L93 Difference]: Finished difference Result 3411 states and 6797 transitions. [2022-03-15 16:16:48,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 326 states. [2022-03-15 16:16:48,688 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.4235294117647057) internal successors, (206), 84 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-03-15 16:16:48,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:48,692 INFO L225 Difference]: With dead ends: 3411 [2022-03-15 16:16:48,692 INFO L226 Difference]: Without dead ends: 3407 [2022-03-15 16:16:48,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 405 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69513 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=42763, Invalid=122479, Unknown=0, NotChecked=0, Total=165242 [2022-03-15 16:16:48,699 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1264 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 2450 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1264 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 2801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 2450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:48,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1264 Valid, 236 Invalid, 2801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 2450 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 16:16:48,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2022-03-15 16:16:48,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 318. [2022-03-15 16:16:48,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.0757097791798107) internal successors, (658), 317 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:48,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 658 transitions. [2022-03-15 16:16:48,713 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 658 transitions. Word has length 76 [2022-03-15 16:16:48,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:48,713 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 658 transitions. [2022-03-15 16:16:48,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.4235294117647057) internal successors, (206), 84 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:48,714 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 658 transitions. [2022-03-15 16:16:48,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-15 16:16:48,714 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:48,714 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:16:48,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-15 16:16:48,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:48,931 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:16:48,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:48,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1083832187, now seen corresponding path program 46 times [2022-03-15 16:16:48,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:48,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144925638] [2022-03-15 16:16:48,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:48,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:49,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:49,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144925638] [2022-03-15 16:16:49,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144925638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:49,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109305792] [2022-03-15 16:16:49,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:16:49,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:49,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:49,130 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) [2022-03-15 16:16:49,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 16:16:49,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:16:49,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:49,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-15 16:16:49,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:49,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:49,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109305792] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:49,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:49,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 19 [2022-03-15 16:16:49,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567634455] [2022-03-15 16:16:49,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:49,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 16:16:49,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:49,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 16:16:49,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2022-03-15 16:16:49,587 INFO L87 Difference]: Start difference. First operand 318 states and 658 transitions. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 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) [2022-03-15 16:16:50,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:50,074 INFO L93 Difference]: Finished difference Result 988 states and 1947 transitions. [2022-03-15 16:16:50,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:16:50,075 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 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 78 [2022-03-15 16:16:50,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:50,076 INFO L225 Difference]: With dead ends: 988 [2022-03-15 16:16:50,076 INFO L226 Difference]: Without dead ends: 877 [2022-03-15 16:16:50,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 169 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2022-03-15 16:16:50,077 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 146 mSDsluCounter, 2792 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 1754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:50,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 2082 Invalid, 1754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1753 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:16:50,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-03-15 16:16:50,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 665. [2022-03-15 16:16:50,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.1551204819277108) internal successors, (1431), 664 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:50,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1431 transitions. [2022-03-15 16:16:50,084 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1431 transitions. Word has length 78 [2022-03-15 16:16:50,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:50,084 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1431 transitions. [2022-03-15 16:16:50,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 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) [2022-03-15 16:16:50,084 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1431 transitions. [2022-03-15 16:16:50,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-15 16:16:50,085 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:50,085 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:16:50,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-15 16:16:50,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-15 16:16:50,286 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:16:50,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:50,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1762435975, now seen corresponding path program 47 times [2022-03-15 16:16:50,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:50,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89969845] [2022-03-15 16:16:50,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:50,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:50,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:50,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89969845] [2022-03-15 16:16:50,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89969845] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:50,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93358537] [2022-03-15 16:16:50,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:16:50,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:50,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:50,794 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) [2022-03-15 16:16:50,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 16:16:50,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-03-15 16:16:50,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:50,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:16:50,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:51,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:52,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93358537] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:52,477 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:52,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 90 [2022-03-15 16:16:52,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190840765] [2022-03-15 16:16:52,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:52,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-15 16:16:52,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:52,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-15 16:16:52,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=6734, Unknown=0, NotChecked=0, Total=8190 [2022-03-15 16:16:52,478 INFO L87 Difference]: Start difference. First operand 665 states and 1431 transitions. Second operand has 91 states, 91 states have (on average 2.098901098901099) internal successors, (191), 90 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:16,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:16,061 INFO L93 Difference]: Finished difference Result 7321 states and 14016 transitions. [2022-03-15 16:17:16,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 516 states. [2022-03-15 16:17:16,061 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.098901098901099) internal successors, (191), 90 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-03-15 16:17:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:16,067 INFO L225 Difference]: With dead ends: 7321 [2022-03-15 16:17:16,067 INFO L226 Difference]: Without dead ends: 5356 [2022-03-15 16:17:16,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 601 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164281 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=88390, Invalid=274616, Unknown=0, NotChecked=0, Total=363006 [2022-03-15 16:17:16,081 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1387 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 4254 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1387 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 4557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 4254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:16,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1387 Valid, 642 Invalid, 4557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 4254 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-15 16:17:16,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5356 states. [2022-03-15 16:17:16,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5356 to 400. [2022-03-15 16:17:16,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.06265664160401) internal successors, (823), 399 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:16,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 823 transitions. [2022-03-15 16:17:16,102 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 823 transitions. Word has length 80 [2022-03-15 16:17:16,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:16,102 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 823 transitions. [2022-03-15 16:17:16,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.098901098901099) internal successors, (191), 90 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:16,102 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 823 transitions. [2022-03-15 16:17:16,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-15 16:17:16,103 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:16,103 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:16,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:16,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-15 16:17:16,313 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:17:16,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:16,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1430754535, now seen corresponding path program 48 times [2022-03-15 16:17:16,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:16,313 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208913636] [2022-03-15 16:17:16,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:16,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:16,583 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:16,584 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:16,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208913636] [2022-03-15 16:17:16,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208913636] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:16,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492408402] [2022-03-15 16:17:16,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:17:16,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:16,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:16,585 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) [2022-03-15 16:17:16,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 16:17:16,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2022-03-15 16:17:16,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:16,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:17:16,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:17,643 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:17,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:18,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492408402] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:18,559 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:18,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 37, 37] total 89 [2022-03-15 16:17:18,560 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220772116] [2022-03-15 16:17:18,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:18,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-15 16:17:18,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:18,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-15 16:17:18,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1909, Invalid=6101, Unknown=0, NotChecked=0, Total=8010 [2022-03-15 16:17:18,561 INFO L87 Difference]: Start difference. First operand 400 states and 823 transitions. Second operand has 90 states, 90 states have (on average 2.422222222222222) internal successors, (218), 89 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:31,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:31,832 INFO L93 Difference]: Finished difference Result 3809 states and 7593 transitions. [2022-03-15 16:17:31,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 363 states. [2022-03-15 16:17:31,833 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.422222222222222) internal successors, (218), 89 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-03-15 16:17:31,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:31,836 INFO L225 Difference]: With dead ends: 3809 [2022-03-15 16:17:31,836 INFO L226 Difference]: Without dead ends: 3805 [2022-03-15 16:17:31,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 447 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86266 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=51954, Invalid=149198, Unknown=0, NotChecked=0, Total=201152 [2022-03-15 16:17:31,844 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1202 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 2758 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1202 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 3171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 2758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:31,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1202 Valid, 251 Invalid, 3171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 2758 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-15 16:17:31,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2022-03-15 16:17:31,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 336. [2022-03-15 16:17:31,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.0776119402985076) internal successors, (696), 335 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:31,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 696 transitions. [2022-03-15 16:17:31,857 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 696 transitions. Word has length 80 [2022-03-15 16:17:31,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:31,857 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 696 transitions. [2022-03-15 16:17:31,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.422222222222222) internal successors, (218), 89 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:31,857 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 696 transitions. [2022-03-15 16:17:31,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-15 16:17:31,857 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:31,858 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:31,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:32,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:32,071 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:17:32,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:32,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1887884599, now seen corresponding path program 49 times [2022-03-15 16:17:32,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:32,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821627982] [2022-03-15 16:17:32,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:32,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:32,316 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:32,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821627982] [2022-03-15 16:17:32,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821627982] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:32,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487192507] [2022-03-15 16:17:32,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:17:32,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:32,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:32,323 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) [2022-03-15 16:17:32,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 16:17:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:32,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 16:17:32,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:32,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:32,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487192507] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:32,882 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:32,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 20 [2022-03-15 16:17:32,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269977043] [2022-03-15 16:17:32,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:32,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:17:32,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:32,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:17:32,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:17:32,890 INFO L87 Difference]: Start difference. First operand 336 states and 696 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 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) [2022-03-15 16:17:33,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:33,441 INFO L93 Difference]: Finished difference Result 1047 states and 2064 transitions. [2022-03-15 16:17:33,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:17:33,442 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 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) Word has length 82 [2022-03-15 16:17:33,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:33,443 INFO L225 Difference]: With dead ends: 1047 [2022-03-15 16:17:33,443 INFO L226 Difference]: Without dead ends: 930 [2022-03-15 16:17:33,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:17:33,444 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 155 mSDsluCounter, 3136 mSDsCounter, 0 mSdLazyCounter, 1964 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 2330 SdHoareTripleChecker+Invalid, 1965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:33,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 2330 Invalid, 1965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1964 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:17:33,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-03-15 16:17:33,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 705. [2022-03-15 16:17:33,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 2.15625) internal successors, (1518), 704 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1518 transitions. [2022-03-15 16:17:33,452 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1518 transitions. Word has length 82 [2022-03-15 16:17:33,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:33,452 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 1518 transitions. [2022-03-15 16:17:33,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 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) [2022-03-15 16:17:33,452 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1518 transitions. [2022-03-15 16:17:33,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-15 16:17:33,453 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:33,453 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:33,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-15 16:17:33,669 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,SelfDestructingSolverStorable51 [2022-03-15 16:17:33,669 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:17:33,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:33,669 INFO L85 PathProgramCache]: Analyzing trace with hash -2121692363, now seen corresponding path program 50 times [2022-03-15 16:17:33,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:33,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240354908] [2022-03-15 16:17:33,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:33,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:34,231 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:34,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240354908] [2022-03-15 16:17:34,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240354908] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:34,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631181037] [2022-03-15 16:17:34,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:17:34,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:34,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:34,232 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) [2022-03-15 16:17:34,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 16:17:34,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:17:34,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:34,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 16:17:34,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:35,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:36,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631181037] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:36,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:36,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 95 [2022-03-15 16:17:36,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034521610] [2022-03-15 16:17:36,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:36,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-15 16:17:36,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:36,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-15 16:17:36,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1613, Invalid=7507, Unknown=0, NotChecked=0, Total=9120 [2022-03-15 16:17:36,034 INFO L87 Difference]: Start difference. First operand 705 states and 1518 transitions. Second operand has 96 states, 96 states have (on average 2.09375) internal successors, (201), 95 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:04,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:04,066 INFO L93 Difference]: Finished difference Result 8117 states and 15536 transitions. [2022-03-15 16:18:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 573 states. [2022-03-15 16:18:04,066 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.09375) internal successors, (201), 95 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-03-15 16:18:04,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:04,073 INFO L225 Difference]: With dead ends: 8117 [2022-03-15 16:18:04,073 INFO L226 Difference]: Without dead ends: 5924 [2022-03-15 16:18:04,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 663 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203453 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=107652, Invalid=333908, Unknown=0, NotChecked=0, Total=441560 [2022-03-15 16:18:04,088 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1542 mSDsluCounter, 1593 mSDsCounter, 0 mSdLazyCounter, 4473 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1542 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 4791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 4473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:04,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1542 Valid, 695 Invalid, 4791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 4473 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-15 16:18:04,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5924 states. [2022-03-15 16:18:04,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5924 to 422. [2022-03-15 16:18:04,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.0641330166270784) internal successors, (869), 421 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:04,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 869 transitions. [2022-03-15 16:18:04,108 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 869 transitions. Word has length 84 [2022-03-15 16:18:04,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:04,109 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 869 transitions. [2022-03-15 16:18:04,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.09375) internal successors, (201), 95 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:04,109 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 869 transitions. [2022-03-15 16:18:04,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-15 16:18:04,109 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:04,109 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:04,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-15 16:18:04,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:04,310 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:04,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:04,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1012428007, now seen corresponding path program 51 times [2022-03-15 16:18:04,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:04,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498250232] [2022-03-15 16:18:04,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:04,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:04,608 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:04,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498250232] [2022-03-15 16:18:04,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498250232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:04,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695985708] [2022-03-15 16:18:04,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:18:04,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:04,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:04,610 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) [2022-03-15 16:18:04,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 16:18:04,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2022-03-15 16:18:04,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:04,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 16:18:04,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:05,746 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:05,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:06,706 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:06,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695985708] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:06,707 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:06,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39, 39] total 94 [2022-03-15 16:18:06,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035588024] [2022-03-15 16:18:06,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:06,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-15 16:18:06,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:06,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-15 16:18:06,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2120, Invalid=6810, Unknown=0, NotChecked=0, Total=8930 [2022-03-15 16:18:06,709 INFO L87 Difference]: Start difference. First operand 422 states and 869 transitions. Second operand has 95 states, 95 states have (on average 2.4210526315789473) internal successors, (230), 94 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:21,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:21,678 INFO L93 Difference]: Finished difference Result 4229 states and 8433 transitions. [2022-03-15 16:18:21,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 402 states. [2022-03-15 16:18:21,678 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.4210526315789473) internal successors, (230), 94 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-03-15 16:18:21,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:21,682 INFO L225 Difference]: With dead ends: 4229 [2022-03-15 16:18:21,682 INFO L226 Difference]: Without dead ends: 4225 [2022-03-15 16:18:21,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 491 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105897 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=62539, Invalid=180017, Unknown=0, NotChecked=0, Total=242556 [2022-03-15 16:18:21,693 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1012 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 3171 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 3423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 3171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:21,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1012 Valid, 287 Invalid, 3423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 3171 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-15 16:18:21,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2022-03-15 16:18:21,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 354. [2022-03-15 16:18:21,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.0793201133144477) internal successors, (734), 353 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:21,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 734 transitions. [2022-03-15 16:18:21,708 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 734 transitions. Word has length 84 [2022-03-15 16:18:21,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:21,708 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 734 transitions. [2022-03-15 16:18:21,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.4210526315789473) internal successors, (230), 94 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:21,708 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 734 transitions. [2022-03-15 16:18:21,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-15 16:18:21,709 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:21,709 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:21,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-15 16:18:21,909 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,SelfDestructingSolverStorable53 [2022-03-15 16:18:21,909 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:21,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:21,909 INFO L85 PathProgramCache]: Analyzing trace with hash 239879411, now seen corresponding path program 52 times [2022-03-15 16:18:21,910 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:21,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734947948] [2022-03-15 16:18:21,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:21,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:22,142 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:22,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734947948] [2022-03-15 16:18:22,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734947948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:22,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268332444] [2022-03-15 16:18:22,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:18:22,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:22,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:22,144 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) [2022-03-15 16:18:22,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 16:18:22,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:18:22,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:22,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-15 16:18:22,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:22,448 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:22,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:22,673 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:22,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268332444] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:22,674 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:22,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 21 [2022-03-15 16:18:22,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245018787] [2022-03-15 16:18:22,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:22,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:18:22,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:22,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:18:22,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:18:22,674 INFO L87 Difference]: Start difference. First operand 354 states and 734 transitions. Second operand has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:23,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:23,283 INFO L93 Difference]: Finished difference Result 1106 states and 2181 transitions. [2022-03-15 16:18:23,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:18:23,283 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-03-15 16:18:23,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:23,285 INFO L225 Difference]: With dead ends: 1106 [2022-03-15 16:18:23,285 INFO L226 Difference]: Without dead ends: 983 [2022-03-15 16:18:23,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 187 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:18:23,285 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 164 mSDsluCounter, 3500 mSDsCounter, 0 mSdLazyCounter, 2187 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 2592 SdHoareTripleChecker+Invalid, 2188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:23,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 2592 Invalid, 2188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2187 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:18:23,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-03-15 16:18:23,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 745. [2022-03-15 16:18:23,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 2.157258064516129) internal successors, (1605), 744 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:23,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1605 transitions. [2022-03-15 16:18:23,292 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1605 transitions. Word has length 86 [2022-03-15 16:18:23,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:23,292 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 1605 transitions. [2022-03-15 16:18:23,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:23,292 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1605 transitions. [2022-03-15 16:18:23,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-15 16:18:23,293 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:23,293 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:23,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-15 16:18:23,509 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,SelfDestructingSolverStorable54 [2022-03-15 16:18:23,509 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:23,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:23,510 INFO L85 PathProgramCache]: Analyzing trace with hash -756560911, now seen corresponding path program 53 times [2022-03-15 16:18:23,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:23,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209264213] [2022-03-15 16:18:23,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:23,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:24,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:24,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209264213] [2022-03-15 16:18:24,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209264213] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:24,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882362002] [2022-03-15 16:18:24,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:18:24,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:24,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:24,130 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) [2022-03-15 16:18:24,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 16:18:24,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-03-15 16:18:24,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:24,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:18:24,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:25,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:26,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882362002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:26,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:26,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 100 [2022-03-15 16:18:26,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791579317] [2022-03-15 16:18:26,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:26,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-03-15 16:18:26,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:26,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-03-15 16:18:26,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1778, Invalid=8322, Unknown=0, NotChecked=0, Total=10100 [2022-03-15 16:18:26,113 INFO L87 Difference]: Start difference. First operand 745 states and 1605 transitions. Second operand has 101 states, 101 states have (on average 2.089108910891089) internal successors, (211), 100 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:59,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:59,478 INFO L93 Difference]: Finished difference Result 8953 states and 17132 transitions. [2022-03-15 16:18:59,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 633 states. [2022-03-15 16:18:59,478 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.089108910891089) internal successors, (211), 100 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-03-15 16:18:59,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:59,485 INFO L225 Difference]: With dead ends: 8953 [2022-03-15 16:18:59,485 INFO L226 Difference]: Without dead ends: 6520 [2022-03-15 16:18:59,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 728 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249299 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=129908, Invalid=402262, Unknown=0, NotChecked=0, Total=532170 [2022-03-15 16:18:59,504 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1805 mSDsluCounter, 1844 mSDsCounter, 0 mSdLazyCounter, 5091 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1805 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 5454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 5091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:59,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1805 Valid, 789 Invalid, 5454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 5091 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-15 16:18:59,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6520 states. [2022-03-15 16:18:59,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6520 to 444. [2022-03-15 16:18:59,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.0654627539503387) internal successors, (915), 443 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:59,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 915 transitions. [2022-03-15 16:18:59,529 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 915 transitions. Word has length 88 [2022-03-15 16:18:59,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:59,529 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 915 transitions. [2022-03-15 16:18:59,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.089108910891089) internal successors, (211), 100 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:59,529 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 915 transitions. [2022-03-15 16:18:59,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-15 16:18:59,530 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:59,530 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:59,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-15 16:18:59,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:59,744 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:59,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:59,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1445729767, now seen corresponding path program 54 times [2022-03-15 16:18:59,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:59,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039966975] [2022-03-15 16:18:59,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:59,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:00,057 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:00,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:00,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039966975] [2022-03-15 16:19:00,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039966975] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:00,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181077522] [2022-03-15 16:19:00,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:19:00,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:00,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:00,060 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) [2022-03-15 16:19:00,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 16:19:00,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-15 16:19:00,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:00,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:19:00,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:01,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:02,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181077522] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:02,342 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:02,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41, 41] total 99 [2022-03-15 16:19:02,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846442451] [2022-03-15 16:19:02,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:02,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-15 16:19:02,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:02,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-15 16:19:02,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2342, Invalid=7558, Unknown=0, NotChecked=0, Total=9900 [2022-03-15 16:19:02,344 INFO L87 Difference]: Start difference. First operand 444 states and 915 transitions. Second operand has 100 states, 100 states have (on average 2.42) internal successors, (242), 99 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:19,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:19,573 INFO L93 Difference]: Finished difference Result 4671 states and 9317 transitions. [2022-03-15 16:19:19,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 443 states. [2022-03-15 16:19:19,574 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.42) internal successors, (242), 99 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-03-15 16:19:19,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:19,578 INFO L225 Difference]: With dead ends: 4671 [2022-03-15 16:19:19,578 INFO L226 Difference]: Without dead ends: 4667 [2022-03-15 16:19:19,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 537 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128721 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=74651, Invalid=215331, Unknown=0, NotChecked=0, Total=289982 [2022-03-15 16:19:19,591 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1531 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 3292 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1531 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 3732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 3292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:19,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1531 Valid, 298 Invalid, 3732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 3292 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-15 16:19:19,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2022-03-15 16:19:19,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 372. [2022-03-15 16:19:19,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.0808625336927222) internal successors, (772), 371 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:19,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 772 transitions. [2022-03-15 16:19:19,606 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 772 transitions. Word has length 88 [2022-03-15 16:19:19,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:19,606 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 772 transitions. [2022-03-15 16:19:19,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.42) internal successors, (242), 99 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:19,607 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 772 transitions. [2022-03-15 16:19:19,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-15 16:19:19,607 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:19,607 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:19,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:19,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:19,823 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:19,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:19,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2128787793, now seen corresponding path program 55 times [2022-03-15 16:19:19,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:19,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126692665] [2022-03-15 16:19:19,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:19,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:20,089 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:20,089 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:20,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126692665] [2022-03-15 16:19:20,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126692665] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:20,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517173792] [2022-03-15 16:19:20,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:19:20,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:20,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:20,090 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) [2022-03-15 16:19:20,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-15 16:19:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:20,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-15 16:19:20,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:20,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:20,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517173792] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:20,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:20,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2022-03-15 16:19:20,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542193484] [2022-03-15 16:19:20,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:20,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:19:20,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:20,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:19:20,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:19:20,680 INFO L87 Difference]: Start difference. First operand 372 states and 772 transitions. Second operand has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:21,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:21,335 INFO L93 Difference]: Finished difference Result 1165 states and 2298 transitions. [2022-03-15 16:19:21,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 16:19:21,336 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-03-15 16:19:21,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:21,337 INFO L225 Difference]: With dead ends: 1165 [2022-03-15 16:19:21,337 INFO L226 Difference]: Without dead ends: 1036 [2022-03-15 16:19:21,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 196 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:19:21,337 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 173 mSDsluCounter, 3884 mSDsCounter, 0 mSdLazyCounter, 2422 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 2868 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:21,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 2868 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2422 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:19:21,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-03-15 16:19:21,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 785. [2022-03-15 16:19:21,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.1581632653061225) internal successors, (1692), 784 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:21,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1692 transitions. [2022-03-15 16:19:21,344 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1692 transitions. Word has length 90 [2022-03-15 16:19:21,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:21,344 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 1692 transitions. [2022-03-15 16:19:21,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:21,345 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1692 transitions. [2022-03-15 16:19:21,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-15 16:19:21,345 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:21,345 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:21,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:21,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:21,546 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:21,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:21,546 INFO L85 PathProgramCache]: Analyzing trace with hash -293527891, now seen corresponding path program 56 times [2022-03-15 16:19:21,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:21,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48159949] [2022-03-15 16:19:21,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:21,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:21,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:22,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:22,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48159949] [2022-03-15 16:19:22,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48159949] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:22,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865745557] [2022-03-15 16:19:22,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:19:22,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:22,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:22,152 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) [2022-03-15 16:19:22,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-15 16:19:22,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:19:22,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:22,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-15 16:19:22,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:23,468 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:23,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:24,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865745557] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:24,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:24,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 105 [2022-03-15 16:19:24,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755968738] [2022-03-15 16:19:24,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:24,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-03-15 16:19:24,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:24,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-03-15 16:19:24,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1951, Invalid=9179, Unknown=0, NotChecked=0, Total=11130 [2022-03-15 16:19:24,251 INFO L87 Difference]: Start difference. First operand 785 states and 1692 transitions. Second operand has 106 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:04,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:04,299 INFO L93 Difference]: Finished difference Result 9829 states and 18804 transitions. [2022-03-15 16:20:04,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 696 states. [2022-03-15 16:20:04,299 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-03-15 16:20:04,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:04,307 INFO L225 Difference]: With dead ends: 9829 [2022-03-15 16:20:04,307 INFO L226 Difference]: Without dead ends: 7144 [2022-03-15 16:20:04,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 918 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 796 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302538 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=155454, Invalid=480552, Unknown=0, NotChecked=0, Total=636006 [2022-03-15 16:20:04,329 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2440 mSDsluCounter, 1880 mSDsCounter, 0 mSdLazyCounter, 5220 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2440 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 5672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 5220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:04,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2440 Valid, 844 Invalid, 5672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 5220 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-15 16:20:04,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7144 states. [2022-03-15 16:20:04,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7144 to 466. [2022-03-15 16:20:04,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.066666666666667) internal successors, (961), 465 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:04,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 961 transitions. [2022-03-15 16:20:04,357 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 961 transitions. Word has length 92 [2022-03-15 16:20:04,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:04,357 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 961 transitions. [2022-03-15 16:20:04,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:04,357 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 961 transitions. [2022-03-15 16:20:04,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-15 16:20:04,358 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:04,358 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:04,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-15 16:20:04,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-15 16:20:04,579 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:20:04,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:04,580 INFO L85 PathProgramCache]: Analyzing trace with hash -226373657, now seen corresponding path program 57 times [2022-03-15 16:20:04,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:04,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038657340] [2022-03-15 16:20:04,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:04,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:04,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:04,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038657340] [2022-03-15 16:20:04,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038657340] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:04,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443522251] [2022-03-15 16:20:04,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:20:04,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:04,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:04,911 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) [2022-03-15 16:20:04,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-15 16:20:04,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-03-15 16:20:04,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:04,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-15 16:20:04,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:06,238 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:06,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:07,407 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:07,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443522251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:07,407 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:07,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 43, 43] total 104 [2022-03-15 16:20:07,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036188909] [2022-03-15 16:20:07,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:07,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-03-15 16:20:07,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:07,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-03-15 16:20:07,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2575, Invalid=8345, Unknown=0, NotChecked=0, Total=10920 [2022-03-15 16:20:07,410 INFO L87 Difference]: Start difference. First operand 466 states and 961 transitions. Second operand has 105 states, 105 states have (on average 2.419047619047619) internal successors, (254), 104 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:27,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:27,301 INFO L93 Difference]: Finished difference Result 5135 states and 10245 transitions. [2022-03-15 16:20:27,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 486 states. [2022-03-15 16:20:27,301 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.419047619047619) internal successors, (254), 104 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-03-15 16:20:27,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:27,306 INFO L225 Difference]: With dead ends: 5135 [2022-03-15 16:20:27,306 INFO L226 Difference]: Without dead ends: 5131 [2022-03-15 16:20:27,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 585 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155069 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=88429, Invalid=255553, Unknown=0, NotChecked=0, Total=343982 [2022-03-15 16:20:27,318 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1144 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 3493 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1144 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 3798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 3493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:27,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1144 Valid, 312 Invalid, 3798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 3493 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-15 16:20:27,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5131 states. [2022-03-15 16:20:27,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5131 to 390. [2022-03-15 16:20:27,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.082262210796915) internal successors, (810), 389 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:27,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 810 transitions. [2022-03-15 16:20:27,334 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 810 transitions. Word has length 92 [2022-03-15 16:20:27,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:27,334 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 810 transitions. [2022-03-15 16:20:27,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.419047619047619) internal successors, (254), 104 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:27,334 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 810 transitions. [2022-03-15 16:20:27,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-15 16:20:27,335 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:27,335 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:27,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-15 16:20:27,535 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,SelfDestructingSolverStorable59 [2022-03-15 16:20:27,536 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:20:27,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:27,536 INFO L85 PathProgramCache]: Analyzing trace with hash 464312939, now seen corresponding path program 58 times [2022-03-15 16:20:27,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:27,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965602512] [2022-03-15 16:20:27,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:27,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:27,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:27,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965602512] [2022-03-15 16:20:27,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965602512] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:27,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111385434] [2022-03-15 16:20:27,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:20:27,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:27,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:27,876 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) [2022-03-15 16:20:27,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-15 16:20:27,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:20:27,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:27,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-15 16:20:27,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:28,164 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:28,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:28,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111385434] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:28,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:28,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 23 [2022-03-15 16:20:28,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494439206] [2022-03-15 16:20:28,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:28,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:20:28,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:28,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:20:28,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:20:28,423 INFO L87 Difference]: Start difference. First operand 390 states and 810 transitions. Second operand has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:29,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:29,159 INFO L93 Difference]: Finished difference Result 1224 states and 2415 transitions. [2022-03-15 16:20:29,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:20:29,159 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-03-15 16:20:29,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:29,161 INFO L225 Difference]: With dead ends: 1224 [2022-03-15 16:20:29,161 INFO L226 Difference]: Without dead ends: 1089 [2022-03-15 16:20:29,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 205 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:20:29,161 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 182 mSDsluCounter, 4288 mSDsCounter, 0 mSdLazyCounter, 2669 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 3158 SdHoareTripleChecker+Invalid, 2670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:29,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 3158 Invalid, 2670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2669 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:20:29,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2022-03-15 16:20:29,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 825. [2022-03-15 16:20:29,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.158980582524272) internal successors, (1779), 824 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:29,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1779 transitions. [2022-03-15 16:20:29,169 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1779 transitions. Word has length 94 [2022-03-15 16:20:29,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:29,169 INFO L470 AbstractCegarLoop]: Abstraction has 825 states and 1779 transitions. [2022-03-15 16:20:29,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:29,169 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1779 transitions. [2022-03-15 16:20:29,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-15 16:20:29,170 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:29,170 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:29,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-15 16:20:29,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:29,370 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:20:29,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:29,370 INFO L85 PathProgramCache]: Analyzing trace with hash 55083881, now seen corresponding path program 59 times [2022-03-15 16:20:29,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:29,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440536202] [2022-03-15 16:20:29,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:29,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:30,010 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:30,011 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:30,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440536202] [2022-03-15 16:20:30,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440536202] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:30,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351140792] [2022-03-15 16:20:30,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:20:30,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:30,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:30,012 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) [2022-03-15 16:20:30,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-15 16:20:30,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-03-15 16:20:30,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:30,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 16:20:30,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:31,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:32,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351140792] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:32,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:32,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 110 [2022-03-15 16:20:32,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958808871] [2022-03-15 16:20:32,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:32,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-03-15 16:20:32,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:32,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-03-15 16:20:32,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2132, Invalid=10078, Unknown=0, NotChecked=0, Total=12210 [2022-03-15 16:20:32,273 INFO L87 Difference]: Start difference. First operand 825 states and 1779 transitions. Second operand has 111 states, 111 states have (on average 2.081081081081081) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:18,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:18,305 INFO L93 Difference]: Finished difference Result 10745 states and 20552 transitions. [2022-03-15 16:21:18,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 762 states. [2022-03-15 16:21:18,305 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.081081081081081) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-03-15 16:21:18,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:18,314 INFO L225 Difference]: With dead ends: 10745 [2022-03-15 16:21:18,314 INFO L226 Difference]: Without dead ends: 7796 [2022-03-15 16:21:18,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 994 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 867 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363935 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=184600, Invalid=569692, Unknown=0, NotChecked=0, Total=754292 [2022-03-15 16:21:18,344 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1611 mSDsluCounter, 2252 mSDsCounter, 0 mSdLazyCounter, 6520 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1611 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 6864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 6520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:18,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1611 Valid, 933 Invalid, 6864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 6520 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-15 16:21:18,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7796 states. [2022-03-15 16:21:18,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7796 to 488. [2022-03-15 16:21:18,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 2.0677618069815193) internal successors, (1007), 487 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:18,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1007 transitions. [2022-03-15 16:21:18,373 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1007 transitions. Word has length 96 [2022-03-15 16:21:18,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:18,373 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 1007 transitions. [2022-03-15 16:21:18,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.081081081081081) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:18,373 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1007 transitions. [2022-03-15 16:21:18,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-15 16:21:18,374 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:18,374 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:18,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-15 16:21:18,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:18,587 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:18,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:18,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1250482919, now seen corresponding path program 60 times [2022-03-15 16:21:18,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:18,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576075574] [2022-03-15 16:21:18,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:18,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:18,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:18,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576075574] [2022-03-15 16:21:18,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576075574] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:18,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738607082] [2022-03-15 16:21:18,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:21:18,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:18,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:18,996 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) [2022-03-15 16:21:18,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-15 16:21:19,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-03-15 16:21:19,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:19,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 16:21:19,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:20,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:21,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738607082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:21,623 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:21,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 45, 45] total 109 [2022-03-15 16:21:21,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799460409] [2022-03-15 16:21:21,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:21,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-03-15 16:21:21,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:21,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-03-15 16:21:21,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2819, Invalid=9171, Unknown=0, NotChecked=0, Total=11990 [2022-03-15 16:21:21,625 INFO L87 Difference]: Start difference. First operand 488 states and 1007 transitions. Second operand has 110 states, 110 states have (on average 2.418181818181818) internal successors, (266), 109 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:45,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:45,207 INFO L93 Difference]: Finished difference Result 5621 states and 11217 transitions. [2022-03-15 16:21:45,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 531 states. [2022-03-15 16:21:45,207 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.418181818181818) internal successors, (266), 109 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-03-15 16:21:45,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:45,212 INFO L225 Difference]: With dead ends: 5621 [2022-03-15 16:21:45,212 INFO L226 Difference]: Without dead ends: 5617 [2022-03-15 16:21:45,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 635 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185289 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=104018, Invalid=301114, Unknown=0, NotChecked=0, Total=405132 [2022-03-15 16:21:45,229 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1720 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 3564 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1720 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 3994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 3564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:45,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1720 Valid, 330 Invalid, 3994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 3564 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-15 16:21:45,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5617 states. [2022-03-15 16:21:45,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5617 to 408. [2022-03-15 16:21:45,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.0835380835380835) internal successors, (848), 407 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:45,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 848 transitions. [2022-03-15 16:21:45,247 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 848 transitions. Word has length 96 [2022-03-15 16:21:45,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:45,247 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 848 transitions. [2022-03-15 16:21:45,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.418181818181818) internal successors, (266), 109 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:45,247 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 848 transitions. [2022-03-15 16:21:45,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-15 16:21:45,248 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:45,248 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:45,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-15 16:21:45,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:45,452 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:45,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:45,452 INFO L85 PathProgramCache]: Analyzing trace with hash 472776743, now seen corresponding path program 61 times [2022-03-15 16:21:45,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:45,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333908636] [2022-03-15 16:21:45,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:45,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:45,821 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:45,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333908636] [2022-03-15 16:21:45,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333908636] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:45,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22023090] [2022-03-15 16:21:45,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:21:45,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:45,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:45,822 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) [2022-03-15 16:21:45,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-15 16:21:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:45,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-15 16:21:45,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:46,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:46,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22023090] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:46,381 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:46,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 24 [2022-03-15 16:21:46,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892439819] [2022-03-15 16:21:46,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:46,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:21:46,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:46,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:21:46,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:21:46,382 INFO L87 Difference]: Start difference. First operand 408 states and 848 transitions. Second operand has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:47,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:47,169 INFO L93 Difference]: Finished difference Result 1283 states and 2532 transitions. [2022-03-15 16:21:47,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 16:21:47,169 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-03-15 16:21:47,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:47,170 INFO L225 Difference]: With dead ends: 1283 [2022-03-15 16:21:47,170 INFO L226 Difference]: Without dead ends: 1142 [2022-03-15 16:21:47,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 214 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:21:47,171 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 191 mSDsluCounter, 4712 mSDsCounter, 0 mSdLazyCounter, 2928 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 3462 SdHoareTripleChecker+Invalid, 2929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:47,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 3462 Invalid, 2929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2928 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:21:47,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-03-15 16:21:47,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 865. [2022-03-15 16:21:47,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 2.1597222222222223) internal successors, (1866), 864 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:47,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1866 transitions. [2022-03-15 16:21:47,183 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1866 transitions. Word has length 98 [2022-03-15 16:21:47,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:47,183 INFO L470 AbstractCegarLoop]: Abstraction has 865 states and 1866 transitions. [2022-03-15 16:21:47,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:47,183 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1866 transitions. [2022-03-15 16:21:47,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-15 16:21:47,184 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:47,184 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:47,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-15 16:21:47,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:47,385 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:47,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:47,385 INFO L85 PathProgramCache]: Analyzing trace with hash 196147749, now seen corresponding path program 62 times [2022-03-15 16:21:47,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:47,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142007375] [2022-03-15 16:21:47,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:47,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:48,115 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:48,115 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:48,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142007375] [2022-03-15 16:21:48,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142007375] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:48,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634896369] [2022-03-15 16:21:48,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:21:48,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:48,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:48,116 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) [2022-03-15 16:21:48,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-15 16:21:48,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:21:48,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:48,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 16:21:48,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:49,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:50,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634896369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:50,523 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:50,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 115 [2022-03-15 16:21:50,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004493771] [2022-03-15 16:21:50,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:50,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-03-15 16:21:50,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:50,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-03-15 16:21:50,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2321, Invalid=11019, Unknown=0, NotChecked=0, Total=13340 [2022-03-15 16:21:50,526 INFO L87 Difference]: Start difference. First operand 865 states and 1866 transitions. Second operand has 116 states, 116 states have (on average 2.0775862068965516) internal successors, (241), 115 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) [2022-03-15 16:22:44,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:44,639 INFO L93 Difference]: Finished difference Result 11701 states and 22376 transitions. [2022-03-15 16:22:44,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 831 states. [2022-03-15 16:22:44,639 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0775862068965516) internal successors, (241), 115 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) Word has length 100 [2022-03-15 16:22:44,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:44,648 INFO L225 Difference]: With dead ends: 11701 [2022-03-15 16:22:44,648 INFO L226 Difference]: Without dead ends: 8476 [2022-03-15 16:22:44,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1073 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 941 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434284 ImplicationChecksByTransitivity, 36.8s TimeCoverageRelationStatistics Valid=217670, Invalid=670636, Unknown=0, NotChecked=0, Total=888306 [2022-03-15 16:22:44,679 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1966 mSDsluCounter, 2198 mSDsCounter, 0 mSdLazyCounter, 6012 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1966 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 6389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 6012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:44,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1966 Valid, 931 Invalid, 6389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 6012 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-15 16:22:44,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8476 states. [2022-03-15 16:22:44,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8476 to 510. [2022-03-15 16:22:44,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 2.068762278978389) internal successors, (1053), 509 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:44,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1053 transitions. [2022-03-15 16:22:44,706 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1053 transitions. Word has length 100 [2022-03-15 16:22:44,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:44,706 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 1053 transitions. [2022-03-15 16:22:44,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0775862068965516) internal successors, (241), 115 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) [2022-03-15 16:22:44,706 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1053 transitions. [2022-03-15 16:22:44,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-15 16:22:44,707 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:44,707 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:44,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-15 16:22:44,907 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,SelfDestructingSolverStorable64 [2022-03-15 16:22:44,907 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:44,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:44,908 INFO L85 PathProgramCache]: Analyzing trace with hash -991922457, now seen corresponding path program 63 times [2022-03-15 16:22:44,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:44,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881261267] [2022-03-15 16:22:44,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:44,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:45,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:45,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881261267] [2022-03-15 16:22:45,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881261267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:45,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826131747] [2022-03-15 16:22:45,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:22:45,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:45,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:45,275 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) [2022-03-15 16:22:45,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-15 16:22:45,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-03-15 16:22:45,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:45,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 16:22:45,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:46,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:48,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826131747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:48,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:48,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 47, 47] total 114 [2022-03-15 16:22:48,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003623646] [2022-03-15 16:22:48,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:48,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-03-15 16:22:48,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:48,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-03-15 16:22:48,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3074, Invalid=10036, Unknown=0, NotChecked=0, Total=13110 [2022-03-15 16:22:48,062 INFO L87 Difference]: Start difference. First operand 510 states and 1053 transitions. Second operand has 115 states, 115 states have (on average 2.417391304347826) internal successors, (278), 114 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:14,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:14,555 INFO L93 Difference]: Finished difference Result 6129 states and 12233 transitions. [2022-03-15 16:23:14,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 578 states. [2022-03-15 16:23:14,555 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.417391304347826) internal successors, (278), 114 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-03-15 16:23:14,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:14,561 INFO L225 Difference]: With dead ends: 6129 [2022-03-15 16:23:14,561 INFO L226 Difference]: Without dead ends: 6125 [2022-03-15 16:23:14,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 687 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219745 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=121569, Invalid=352463, Unknown=0, NotChecked=0, Total=474032 [2022-03-15 16:23:14,580 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1846 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 3465 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1846 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 3911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 3465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:14,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1846 Valid, 331 Invalid, 3911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 3465 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-15 16:23:14,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6125 states. [2022-03-15 16:23:14,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6125 to 426. [2022-03-15 16:23:14,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.084705882352941) internal successors, (886), 425 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:14,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 886 transitions. [2022-03-15 16:23:14,598 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 886 transitions. Word has length 100 [2022-03-15 16:23:14,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:14,598 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 886 transitions. [2022-03-15 16:23:14,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.417391304347826) internal successors, (278), 114 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:14,599 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 886 transitions. [2022-03-15 16:23:14,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-15 16:23:14,599 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:14,599 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:14,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-15 16:23:14,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:14,800 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:23:14,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:14,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1403799581, now seen corresponding path program 64 times [2022-03-15 16:23:14,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:14,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809288242] [2022-03-15 16:23:14,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:14,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:15,103 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:15,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809288242] [2022-03-15 16:23:15,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809288242] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:15,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179980920] [2022-03-15 16:23:15,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:23:15,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:15,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:15,105 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) [2022-03-15 16:23:15,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-15 16:23:15,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:23:15,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:23:15,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-15 16:23:15,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:15,459 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:15,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:15,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179980920] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:15,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:15,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 25 [2022-03-15 16:23:15,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672286991] [2022-03-15 16:23:15,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:15,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:23:15,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:15,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:23:15,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:23:15,725 INFO L87 Difference]: Start difference. First operand 426 states and 886 transitions. Second operand has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:16,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:16,593 INFO L93 Difference]: Finished difference Result 1342 states and 2649 transitions. [2022-03-15 16:23:16,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:23:16,593 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-03-15 16:23:16,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:16,594 INFO L225 Difference]: With dead ends: 1342 [2022-03-15 16:23:16,595 INFO L226 Difference]: Without dead ends: 1195 [2022-03-15 16:23:16,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 223 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:23:16,595 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 200 mSDsluCounter, 5156 mSDsCounter, 0 mSdLazyCounter, 3199 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 3780 SdHoareTripleChecker+Invalid, 3200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:16,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 3780 Invalid, 3200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3199 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:23:16,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-03-15 16:23:16,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 905. [2022-03-15 16:23:16,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.1603982300884956) internal successors, (1953), 904 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:16,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1953 transitions. [2022-03-15 16:23:16,604 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1953 transitions. Word has length 102 [2022-03-15 16:23:16,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:16,604 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1953 transitions. [2022-03-15 16:23:16,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:16,604 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1953 transitions. [2022-03-15 16:23:16,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-15 16:23:16,605 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:16,605 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:16,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-15 16:23:16,805 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,SelfDestructingSolverStorable66 [2022-03-15 16:23:16,805 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:23:16,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:16,805 INFO L85 PathProgramCache]: Analyzing trace with hash -844266783, now seen corresponding path program 65 times [2022-03-15 16:23:16,806 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:16,806 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128844932] [2022-03-15 16:23:16,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:16,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:17,549 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:17,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128844932] [2022-03-15 16:23:17,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128844932] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:17,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67427733] [2022-03-15 16:23:17,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:23:17,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:17,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:17,550 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) [2022-03-15 16:23:17,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-15 16:23:17,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-03-15 16:23:17,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:23:17,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:23:17,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:19,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:20,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67427733] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:20,104 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:20,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 120 [2022-03-15 16:23:20,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074425833] [2022-03-15 16:23:20,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:20,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-03-15 16:23:20,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:20,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-03-15 16:23:20,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2518, Invalid=12002, Unknown=0, NotChecked=0, Total=14520 [2022-03-15 16:23:20,106 INFO L87 Difference]: Start difference. First operand 905 states and 1953 transitions. Second operand has 121 states, 121 states have (on average 2.074380165289256) internal successors, (251), 120 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:23,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:23,253 INFO L93 Difference]: Finished difference Result 12697 states and 24276 transitions. [2022-03-15 16:24:23,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 903 states. [2022-03-15 16:24:23,253 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.074380165289256) internal successors, (251), 120 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2022-03-15 16:24:23,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:23,263 INFO L225 Difference]: With dead ends: 12697 [2022-03-15 16:24:23,263 INFO L226 Difference]: Without dead ends: 9184 [2022-03-15 16:24:23,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1155 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 1018 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514425 ImplicationChecksByTransitivity, 41.7s TimeCoverageRelationStatistics Valid=255002, Invalid=784378, Unknown=0, NotChecked=0, Total=1039380 [2022-03-15 16:24:23,302 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2075 mSDsluCounter, 2530 mSDsCounter, 0 mSdLazyCounter, 7087 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2075 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 7555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 7087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:23,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2075 Valid, 1078 Invalid, 7555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 7087 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-03-15 16:24:23,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9184 states. [2022-03-15 16:24:23,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9184 to 532. [2022-03-15 16:24:23,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.0696798493408664) internal successors, (1099), 531 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:23,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1099 transitions. [2022-03-15 16:24:23,337 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1099 transitions. Word has length 104 [2022-03-15 16:24:23,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:23,337 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 1099 transitions. [2022-03-15 16:24:23,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.074380165289256) internal successors, (251), 120 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:23,338 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1099 transitions. [2022-03-15 16:24:23,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-15 16:24:23,338 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:23,338 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:23,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-15 16:24:23,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-15 16:24:23,539 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:24:23,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:23,539 INFO L85 PathProgramCache]: Analyzing trace with hash 966255591, now seen corresponding path program 66 times [2022-03-15 16:24:23,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:23,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485501625] [2022-03-15 16:24:23,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:23,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:23,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:23,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485501625] [2022-03-15 16:24:23,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485501625] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:23,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192905795] [2022-03-15 16:24:23,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:24:23,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:23,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:23,954 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) [2022-03-15 16:24:23,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-15 16:24:24,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2022-03-15 16:24:24,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:24,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:24:24,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:25,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:27,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192905795] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:27,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:27,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 49, 49] total 119 [2022-03-15 16:24:27,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414301101] [2022-03-15 16:24:27,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:27,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-03-15 16:24:27,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:27,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-03-15 16:24:27,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3340, Invalid=10940, Unknown=0, NotChecked=0, Total=14280 [2022-03-15 16:24:27,034 INFO L87 Difference]: Start difference. First operand 532 states and 1099 transitions. Second operand has 120 states, 120 states have (on average 2.4166666666666665) internal successors, (290), 119 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:58,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:58,670 INFO L93 Difference]: Finished difference Result 6659 states and 13293 transitions. [2022-03-15 16:24:58,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 627 states. [2022-03-15 16:24:58,671 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.4166666666666665) internal successors, (290), 119 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2022-03-15 16:24:58,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:58,678 INFO L225 Difference]: With dead ends: 6659 [2022-03-15 16:24:58,678 INFO L226 Difference]: Without dead ends: 6655 [2022-03-15 16:24:58,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 741 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258818 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=141239, Invalid=410067, Unknown=0, NotChecked=0, Total=551306 [2022-03-15 16:24:58,699 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1211 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 4546 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1211 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 4831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 4546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:58,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1211 Valid, 395 Invalid, 4831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 4546 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-15 16:24:58,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6655 states. [2022-03-15 16:24:58,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6655 to 444. [2022-03-15 16:24:58,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.0857787810383748) internal successors, (924), 443 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:58,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 924 transitions. [2022-03-15 16:24:58,723 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 924 transitions. Word has length 104 [2022-03-15 16:24:58,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:58,723 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 924 transitions. [2022-03-15 16:24:58,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.4166666666666665) internal successors, (290), 119 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:58,723 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 924 transitions. [2022-03-15 16:24:58,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-15 16:24:58,724 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:58,724 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:58,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-15 16:24:58,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-15 16:24:58,925 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:24:58,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:58,925 INFO L85 PathProgramCache]: Analyzing trace with hash -514784865, now seen corresponding path program 67 times [2022-03-15 16:24:58,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:58,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302911471] [2022-03-15 16:24:58,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:58,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:59,261 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:59,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302911471] [2022-03-15 16:24:59,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302911471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:59,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150370750] [2022-03-15 16:24:59,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:24:59,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:59,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:59,262 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) [2022-03-15 16:24:59,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-15 16:24:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:59,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-15 16:24:59,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:59,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:59,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:59,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150370750] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:59,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:59,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 26 [2022-03-15 16:24:59,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185404151] [2022-03-15 16:24:59,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:59,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:24:59,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:59,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:24:59,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:24:59,904 INFO L87 Difference]: Start difference. First operand 444 states and 924 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:00,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:25:00,878 INFO L93 Difference]: Finished difference Result 1401 states and 2766 transitions. [2022-03-15 16:25:00,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:25:00,878 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-03-15 16:25:00,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:25:00,880 INFO L225 Difference]: With dead ends: 1401 [2022-03-15 16:25:00,880 INFO L226 Difference]: Without dead ends: 1248 [2022-03-15 16:25:00,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 232 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:25:00,880 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 209 mSDsluCounter, 5620 mSDsCounter, 0 mSdLazyCounter, 3482 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 4112 SdHoareTripleChecker+Invalid, 3483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:25:00,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 4112 Invalid, 3483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3482 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:25:00,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-03-15 16:25:00,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 945. [2022-03-15 16:25:00,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 2.1610169491525424) internal successors, (2040), 944 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:00,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 2040 transitions. [2022-03-15 16:25:00,888 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 2040 transitions. Word has length 106 [2022-03-15 16:25:00,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:25:00,888 INFO L470 AbstractCegarLoop]: Abstraction has 945 states and 2040 transitions. [2022-03-15 16:25:00,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:00,889 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 2040 transitions. [2022-03-15 16:25:00,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-15 16:25:00,889 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:25:00,889 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:25:00,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-15 16:25:01,090 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,SelfDestructingSolverStorable69 [2022-03-15 16:25:01,090 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:25:01,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:25:01,090 INFO L85 PathProgramCache]: Analyzing trace with hash -625926755, now seen corresponding path program 68 times [2022-03-15 16:25:01,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:25:01,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818480424] [2022-03-15 16:25:01,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:25:01,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:25:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:25:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:01,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:25:01,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818480424] [2022-03-15 16:25:01,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818480424] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:25:01,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538368416] [2022-03-15 16:25:01,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:25:01,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:25:01,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:25:01,911 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) [2022-03-15 16:25:01,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-15 16:25:01,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:25:01,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:25:01,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:25:01,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:25:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:03,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:25:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:04,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538368416] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:25:04,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:25:04,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 125 [2022-03-15 16:25:04,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161005057] [2022-03-15 16:25:04,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:25:04,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-03-15 16:25:04,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:25:04,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-03-15 16:25:04,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2723, Invalid=13027, Unknown=0, NotChecked=0, Total=15750 [2022-03-15 16:25:04,712 INFO L87 Difference]: Start difference. First operand 945 states and 2040 transitions. Second operand has 126 states, 126 states have (on average 2.0714285714285716) internal successors, (261), 125 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-03-15 16:25:49,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 696 states. [2022-03-15 16:25:49,431 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 [2022-03-15 16:25:49,431 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:25:49,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 816 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325627 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=179427, Invalid=488879, Unknown=0, NotChecked=0, Total=668306 [2022-03-15 16:25:49,438 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2148 mSDsluCounter, 2096 mSDsCounter, 0 mSdLazyCounter, 6408 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2148 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 6878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 6408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:25:49,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2148 Valid, 782 Invalid, 6878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 6408 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-15 16:25:49,439 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 16:25:49,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-15 16:25:49,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:25:49,641 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (945states) and FLOYD_HOARE automaton (currently 696 states, 126 states before enhancement),while ReachableStatesComputation was computing reachable states (8468 states constructed, input type IntersectNwa). [2022-03-15 16:25:49,642 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 16:25:49,642 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 16:25:49,647 INFO L732 BasicCegarLoop]: Path program histogram: [68, 2, 1] [2022-03-15 16:25:49,649 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 16:25:49,649 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 16:25:49,650 INFO L202 PluginConnector]: Adding new model figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 04:25:49 BasicIcfg [2022-03-15 16:25:49,650 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 16:25:49,650 INFO L158 Benchmark]: Toolchain (without parser) took 747136.54ms. Allocated memory was 197.1MB in the beginning and 2.0GB in the end (delta: 1.8GB). Free memory was 162.0MB in the beginning and 676.6MB in the end (delta: -514.6MB). Peak memory consumption was 1.2GB. Max. memory is 8.0GB. [2022-03-15 16:25:49,650 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 197.1MB. Free memory is still 163.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:25:49,650 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.42ms. Allocated memory is still 197.1MB. Free memory was 161.9MB in the beginning and 160.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 16:25:49,650 INFO L158 Benchmark]: Boogie Preprocessor took 12.65ms. Allocated memory is still 197.1MB. Free memory was 160.4MB in the beginning and 159.5MB in the end (delta: 860.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 16:25:49,650 INFO L158 Benchmark]: RCFGBuilder took 161.15ms. Allocated memory is still 197.1MB. Free memory was 159.4MB in the beginning and 150.6MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-15 16:25:49,650 INFO L158 Benchmark]: TraceAbstraction took 746934.58ms. Allocated memory was 197.1MB in the beginning and 2.0GB in the end (delta: 1.8GB). Free memory was 150.2MB in the beginning and 676.6MB in the end (delta: -526.4MB). Peak memory consumption was 1.2GB. Max. memory is 8.0GB. [2022-03-15 16:25:49,651 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 0.11ms. Allocated memory is still 197.1MB. Free memory is still 163.1MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.42ms. Allocated memory is still 197.1MB. Free memory was 161.9MB in the beginning and 160.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 12.65ms. Allocated memory is still 197.1MB. Free memory was 160.4MB in the beginning and 159.5MB in the end (delta: 860.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 161.15ms. Allocated memory is still 197.1MB. Free memory was 159.4MB in the beginning and 150.6MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 746934.58ms. Allocated memory was 197.1MB in the beginning and 2.0GB in the end (delta: 1.8GB). Free memory was 150.2MB in the beginning and 676.6MB in the end (delta: -526.4MB). Peak memory consumption was 1.2GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (945states) and FLOYD_HOARE automaton (currently 696 states, 126 states before enhancement),while ReachableStatesComputation was computing reachable states (8468 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (945states) and FLOYD_HOARE automaton (currently 696 states, 126 states before enhancement),while ReachableStatesComputation was computing reachable states (8468 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (945states) and FLOYD_HOARE automaton (currently 696 states, 126 states before enhancement),while ReachableStatesComputation was computing reachable states (8468 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 31 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 746.9s, OverallIterations: 71, TraceHistogramMax: 24, PathProgramHistogramMax: 68, EmptinessCheckTime: 0.0s, AutomataDifference: 644.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 47339 SdHoareTripleChecker+Valid, 65.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 47339 mSDsluCounter, 50930 SdHoareTripleChecker+Invalid, 54.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 83118 mSDsCounter, 10497 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 143222 IncrementalHoareTripleChecker+Invalid, 153719 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10497 mSolverCounterUnsat, 2666 mSDtfsCounter, 143222 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 24293 GetRequests, 6903 SyntacticMatches, 115 SemanticMatches, 17275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4508553 ImplicationChecksByTransitivity, 487.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=945occurred in iteration=70, InterpolantAutomatonStates: 13772, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 70 MinimizatonAttempts, 130948 StatesRemovedByMinimization, 70 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 83.9s InterpolantComputationTime, 8586 NumberOfCodeBlocks, 8586 NumberOfCodeBlocksAsserted, 613 NumberOfCheckSat, 12655 ConstructedInterpolants, 0 QuantifiedInterpolants, 99032 SizeOfPredicates, 345 NumberOfNonLiveVariables, 11017 ConjunctsInSsa, 2461 ConjunctsInUnsatCore, 209 InterpolantComputations, 3 PerfectInterpolantSequences, 26012/77971 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